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Welcome to the Instructables Teachers Hub!

Welcome to the new home for all things Teacher related on Instructables. We hope you'll explore the new features and come back often to find and share projects, inspiration, and classroom resources. As you explore the new Teachers Hub, you'll see it's easy to find projects by subject or grade level and sort them to find all the best and freshest projects.Be sure to spend some time in the new Teacher Forum. It's a great place to connect with fellow teachers and make new friends! You could start by introducing yourself here or finding a topic that interests you and join the conversation there. :)We'll be working to continuously update and support your needs in this new area of the Instructables community, so thank you in advance for your valued feedback and suggestions.

Topic by WeTeachThemSTEM    |  last reply


Welcome to Instructables

On this page you can find links to some of our most frequently asked questions. What is this site? Instructables is a community for people who like to make things. Our community shares what they make in a step-by-step format that we call an Instructable.How do I post an Instructable? We offer a free and easy online class to coach you through posting your first Instructable or you can just wing it and start a new one today. How do I get help improving my Instructable?Ask the community for help in The Clinic. How does my Instructable get featured? The best way to get your projects featured is by following the Featuring Guidelines. Where can I learn more about contests? Our Contest FAQ has all of the information that you need to know about contests. What contests are launching soon? Check out our list of upcoming contests. Are you on social media? Yes! Follow us on Pinterest, Instagram and Twitter. How do I contact Instructables directly? The best way to contact us is through our Contact Page.

Topic by randofo    |  last reply


How to make a single frequency am radio receiver?

I know how to make a 1 mhz am radio transmitter, so now I want to make a 1 mhz radio receiver to receive audio. I would prefer to not have to wind any coils and just make solid state with few components. Do I need to have a coil to receive the radio waves? Also can someone link me to an explanation or explain how I can demodulate with a 1 mhz crystal oscillator. I don't want a link to 'how to make an am radio' I can do that myself. I just want to know A. how to receive the radio signals hopefully without a coil (only using a variable cap?) and B. How I can demodulate using a crystal oscillator. Can I somehow receive the signal using an oscillator like was done with a 555 timer here https://www.instructables.com/id/555-timer-radio/ Links to schematics / pictures of schematics must appreciated? Thank you

Question by sk8aseth    |  last reply


Textfile much bigger in size than originnally posted

Hi all,I recently posted this Instructable: https://www.instructables.com/id/USB-to-Serial-TTL...I attached the program as textfile (.txt) since it did not accept the '.jal' extension since the program is actually written in JAL. The strange thing is that if you download this textfile it is 106 Mbyte in size! The original text file is only 8 kbyte. I also uploaded a hexfile (.hex) which does not have this problem.Does anybody know why the Instructable website converts a 8 kbyte textfile to a 106 Mbyte textfile? If I open this file in Notepad++ it opens after quite some time but the contents seems to be OK.Kind regards,Rob

Question by RobBest    |  last reply


How to connect small toy motor to solar panel?

I've a school project to submit and the thing I'm making involves connecting a small toy motor that I salvaged,  to a solar panel from the same toy (pictures attached) . They came attached to gether but I accidentally got them to separate. The wire was joined (?) with panel by a glue and that was the one that got lose. I can't seem to get the circuit to close now. I only tried holding it in place by hand though. Before I use insulation tape, I need to confirm. Is there anything I'm missing? I live in an arid place with hardly any clouds, so sunlight is not a problem.

Question by zaekr    |  last reply


Electrical hum when stepping up usb to 9v

Hi. I'm wanting to power some lights with usb. I'm using a 5v to 9v step-up board to get the correct voltage. This works, however, the step-up board makes a humming noise. Is there a way to eliminate the hum? Thanks!

Question by aliasjanedoe    |  last reply


LED's and Arduino Question,,,,

LED's and Arduino Question,,,, I am looking to install LED lights (a LOT) in a 1:18 diecast car. I'm slowly grasping the wire schematics, and feel the install wont be too tough (yeah right)... But, I am looking for a way to turn the lights on/off. Since I will put lights (or extend fiber optics to) tail lights, blinkers (front and rear) brake lights, fog lights, running (marker) lights, head lights, and a bevy of interior point lights via a Fiber Optic layout. My main question is the lighting controls. As you can see, I need to be able to switch a variety of lights, in different modes,,, Blinking for 4-way, blinking for turn signal, all on, just running lights on, and brakes lights on....Anyone care (dare) to step in? Similar to this... http://youtu.be/WbqQ0tUtX3U

Question by vwluvrs    |  last reply


Self home energy aduit? ?

Does anyone have a printable checklist, maybe even a speradsheet that is/can be use to calculate and track home energy use?  I want to do a self energy audit and be able to track energy use over time.  I've looked on google and can't find anything like that, most are just guides for what to look for, nothing to actually use to document info with. 

Question by RedneckEngineer    |  last reply


Rate my drawing

Gandalf

Topic by darrendinnegan    |  last reply


Fishing the traditional way

A while ago I had a very bad day of fishing in terms of catching something for my frying pan or freezer.Same story for the old bloke sitting a few meters away from me.So we decided to pass some time with useless chats about our previous record fish we caught.While the old bloke changed bait I noticed that he did not have a hook at the end of the line.....What is that contraption and how do you catch fish with it?Old bloke laughed and said he goes hunting a lot too and always keeps the antlers from deer and such.Instead of a hook he used a round and pointy bar with a little notch slightly off the middle.Couldn't figure out how this possibly could hook a fish, so got a bigger laugh for it this time :("Make a loose fist, put it in and then pull on the line." he said and I was dumb enough to assume it would not work :(Figure it out by getting two bleeding pricks...Fish swallows the "stick" inside the bait and one there is some pull one pointy end will always get stuck.The other moves until there is no room to move anymore and the fish is spiked up for good.Only downside is that one you get a fish too big it might not grab - bad luck then LOLThis approach instead of steel hooks reminded me of the bamboo fishing poles my grandfather used to make.Be it for eel, trout, carp or even from the boat for pollock and sardine - he loved his bamboo.Even made me my fisrt fly fishing rod from a piece of bamboo :)The old guy however had more than hand made rods or horn needles as hooks.When his hands were still as good as his eyes he even made flies from these horn sticks!He explained the process to me but I never had the patience for normal flies and doing this with horn sticks and estimating how big the biggest fish might be while making sure it is neither too heavy nor fails to float...What I really liked about this otherwise wasted fishing day was the stories I got from the old man."You don't need fancy or oversensitive gear to fish, a safety pin and some packing coad do just fine if you are hungry!"Best story was how he caught a 2m gummy shark with a hand line meant to catch some sardines for bait.I could really his 3 hour struggle to get the thing on board LOLWhat are your most successfull old school or just plain weird catches with something a real sports fisherman would not even touch to cast?

Topic by Downunder35m    |  last reply


Polarity of fan motor?

Recently I had occasion to change the small fan that cool the aluminum fins just above the exturder. Not paying too much attention to the polarity of the 12 volt supply voltage, I figured that if was turning the wrong way, I could easily change the plus and minus connection. When I fired up the controller, I thought it was turning the wrong way and I changed the polarity. It then wouldn't turn at all. Changing it back to the original polarity, it worked fine. It is normal to have the fan polarized, and if so, what is the proper direction of air flow?Alan

Question by agil0629    |  last reply


How do you know if a capacitor is finished charging to its full potential capacidence?

How do you know if a capacitor is finished charging to its full potential? Also if you were to have a group of capacitors linked together in a series or parallel fashion how could you determine whether or not the capacitors were charged completely? I am mainly referring to polarized capacitors. 

Question by Dr. Kreap    |  last reply


How do I get Notepad up?

Okay. So apparently, my school has figured out how to keep you from deleting the source from web pages so you can use the empty source thing as notepad. Does anyone know any other way to get notepad up? The regular notepad program is blocked too.

Topic by mbudde    |  last reply


How can I make the most of my homemade stocks/broths?

Hello everyone,,I've been enjoying making vegetable broth/chicken stock over the past month or so, and it's made for some filling soups. However, I find that whatever I make soup with overpowers the broth so much that I can't appreciate the flavors of the broth. For example, I like to make a simple Minestrone. The broth tastes fantastic, but the potatoes and green beans I add to the soup leave no room for the broth to stand out. Is that just how soups work?That aside, I'd like to find other simple soup recipes so I can use all this stock I keep making..

Question by Devabhai    |  last reply


Instructables Makey Makey Instagram Sweepstakes Official Rules

View this post on Instagram A post shared by Instructables.com (@instructables) on Feb 21, 2020 at 10:46am PST We're holding a second Instagram sweepstakes! Official rules below:INSTRUCTABLES MAKEY MAKEY SWEEPSTAKES OFFICIAL RULES (THE “OFFICIAL RULES”)PLEASE REVIEW THESE OFFICIAL RULES BEFORE ENTERING THE SWEEPSTAKES. NO PURCHASE OR PAYMENT OF ANY KIND IS NECESSARY TO ENTER OR WIN. A PURCHASE OR PAYMENT WILL NOT IMPROVE YOUR CHANCES OF WINNING. VOID WHERE PROHIBITED BY LAW. ENTRANTS WHO ARE MINORS: YOU MUST OBTAIN THE CONSENT OF YOUR PARENT OR LEGAL GUARDIAN BEFORE ENTERING THE SWEEPSTAKES AND PARTICIPATE UNDER THEIR SUPERVISION.1. Sweepstakes Description: Comment on the Instructables Makey Makey Sweepstakes Instagram post, tag a friend who you think would also love the Prize and add the tag #InstructablesSweepstakes, and you will be entered into a random drawing to receive the prizes described below, all as further described in these Official Rules. 2. General Conditions: The Instructables Makey Makey Sweepstakes (the “Sweepstakes”) is sponsored by Autodesk, Inc. (the “Sponsor”). The Sweepstakes will start on February 21, 2020 at 11 AM PT (“Start Date”) and end on February 23, 2020 at 11:59 PM PT. (the “Entry Period”). Entry in the Sweepstakes does not constitute entry into any other promotion, sweepstakes, or contest. The distribution of the prize(s) will be at the sole determination of the Sponsor to the individual(s) deemed the winner(s) of the Sweepstakes by the Sponsor in accordance with these Official Rules. 3. Acceptance of the Official Rules; Site Policies; Laws: By entering the Sweepstakes, those who enter the Sweepstakes (each, an “Entrant”) unconditionally accept and agree to abide by the terms of these Official Rules and by the decisions of Sponsor relating to the Sweepstakes, which are final and binding in all respects. The Sweepstakes shall be governed by these Official Rules and is subject to applicable federal, state, and local statutes, rules, regulations, and other laws (each a “Law”). The Sweepstakes is void where prohibited or restricted by law. The collection, use, and disclosure of information obtained online from Entrants in the Sweepstakes is governed by Sponsor's Privacy Statement, which may be viewed at https://www.autodesk.com/company/legal-notices-tr... and other policies applicable to and available for review on the Instructables website at https://www.autodesk.com/company/legal-notices-tr... (the “Instructables Site”) (collectively, the “Policies”). In the event there is an inconsistency between any of the Policies or any Sweepstakes promotional materials and the terms and conditions of these Official Rules, these Official Rules will prevail and govern. 4. Eligibility: Entrants must be natural persons age 13 or older who are legal residents of the fifty (50) United States, the District of Columbia or Canada (excluding Quebec) at the time of entry. If on the Start Date you are a “minor,” meaning that you are under the age of majority in your jurisdiction, you must obtain permission from your parent or legal guardian, and your parent or legal guardian must consent to be bound by these Official Rules as if he or she were an entrant, before you submit an entry. Sponsor reserves the right to require minors to submit proof of parental/guardian permission and consent to these Official Rules at any time, without which they may be immediately disqualified from the Sweepstakes. In addition, Sponsor, its affiliated organizations, advertising and promotion agencies, the prize providers, any other company or organization involved with the design, sponsorship, or operation of the Sweepstakes, and each of their respective officers, directors, employees, and agents (collectively, the “Sponsor Parties”), and immediate family and household members of such individuals, are NOT eligible to enter the Sweepstakes. “Immediate family members” shall mean a person’s spouse and a person’s and their spouse’s parents, step-parents, legal guardians, children, step-children, siblings, and step-siblings, and each of their respective spouses. “Household members” shall mean those people who share the same residence, whether or not related. Participation in the Sweepstakes is voluntary, and is not intended to, and shall not be deemed to create, any employment, agency, partnership, joint venture, franchise, fiduciary, or similar relationship between Sponsor and any Entrant. 5. How to Enter: Only persons who meet the eligibility criteria stated in Section 4 above should enter the Sweepstakes, and only those persons will be eligible for the chance to win a prize. No purchase or payment is necessary to enter or win the Sweepstakes. A complete entry will include, any information required in these Rules. All entries must be received by the end of the Entry Period. Incomplete, unreadable, late, or unintelligible entries are void and will be disqualified. In order to win, Entrants residing in Canada also will be required to answer a time-limited mathematical skill-testing question to be administered via telephone. Limit of one (1) entry per Entrant during the Entry Period. In case of multiple entries received from any person, email address, or social media account, only the first entry received from such person, email address, or social media account will be considered. In the event of a dispute as to the identity or eligibility of an Entrant, the entry will be deemed to be made by the “Authorized Account Holder” of the email or social media account used at the time of entry provided he/she is eligible according to these Official Rules. The “Authorized Account Holder” is defined as the natural person to whom the applicable internet service provider or other organization (such as a business or educational institution) has assigned the account. An Entrant may not use multiple email or social media accounts to enter, and if an Entrant does so, all of such Entrant’s entries may be disqualified. To enter the Sweepstakes, during the Entry Period you must comment on the Makey Makey Sweepstakes post made by Instructables on the Start Date to the Instructables Instagram page, tag a friend who you think would also love the Prize and add the tag #InstructablesSweepstakes, and you will be entered into a random drawing to receive the prizes described below. THE PERSON TAGGED IN YOUR ENTRY WILL NOT BE ELIGIBLE TO WIN A PRIZE BASED ON YOUR ENTRY, BUT THEY MAY CHOOSE TO SEPARATELY ENTER THE SWEEPSTAKES BY SUBMITTING THEIR OWN ENTRY.For clarity, completion of one of the tasks as directed above does NOT entitle Entrants to a prize, but entitles eligible Entrants to enter a random drawing for a chance to win a prize.6. Winner Selection; Odds of Winning: On or around February 24, 2020 at Sponsor’s offices, Sponsor will randomly select from the pool of eligible Entrants one (1) Sweepstakes winner(s) (the “Winner”). The odds of winning the prize depend on the total number of eligible Entrants who enter the Sweepstakes. 7. Prize: The total estimated retail value of all of the prizes to be awarded in the Sweepstakes is $162.00 USD. One (1) Winner will be awarded the following prizes with the following estimated retail value. The Winner may choose to keep both prize packs or share one with a friend: Prize Pack #1 (Estimated Retail Value: USD$81.00) Instructables T-Shirt Instructables Notebook Instructables PinMakey Makey Inventor Kit Prize Pack #2 (Estimated Retail Value: USD$81.00) Makey Makey Inventor Kit Instructables T-ShirtInstructables Notebook Instructables PinMakey Makey is not a sponsor of, and is not affiliated with, the Sweepstakes.The prize(s) may include one or more gift cards, gift certificates, stored-value cards, similar cards or certificates (whether in physical, electronic, or other form), or other items or services, which may be redeemed or received only at or through participating retailers or other locations. Each Entrant acknowledges that acceptance and use of any such prize are subject to all eligibility criteria, expiration dates, service or dormancy fees, use restrictions, and all other terms and conditions (if any) imposed by the issuer or provider of any such prize. Neither Sponsor nor any of its parents, subsidiaries, or affiliates is the issuer or provider of any such prize, and none of them are responsible for establishing those terms and conditions, for disclosing or explaining any of those terms and conditions to the Entrants, or for any Winner’s failure to comply with any of them. If a Winner does not comply with all of those terms and conditions, or if a Winner does not have access to a participating location, such Winner may not be able to obtain the maximum value, or any value, from his or her prize. 8. General Prize Conditions: All details and other restrictions of the prize(s) not specified in these Official Rules will be determined by the Sponsor in its sole discretion. No prize is exchangeable, assignable, redeemable for cash or otherwise transferable, except at Sponsor’s sole and absolute discretion. Sponsor reserves the right to substitute for any prize one or more items or services of equal or greater estimated retail value. The value of each prize may be taxable to each Winner as income. If required, an IRS Form 1099 will be issued by Sponsor in the name of each Winner for the value of the prize(s) received. Each Winner is solely responsible for complying with any and all applicable federal, state, provincial, local, or other statutes, regulations, rules, or other laws of any jurisdiction and for bearing any personal income taxes (including reporting consequences thereof), VAT, customs duties, withholding taxes, or other taxes, fees, insurance, surcharges, or other costs relating to the applicable prize(s) and for any other liabilities incurred in connection with any prize. THE PRIZE IS AWARDED BY SPONSOR “AS IS.” THE SPONSOR PARTIES DO NOT MAKE AND HEREBY DISCLAIM ANY WARRANTIES, WHETHER EXPRESS, IMPLIED, OR STATUTORY (INCLUDING WITHOUT LIMITATION IMPLIED AND STATUTORY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, OR NON-INFRINGEMENT) WITH REGARD TO THE SWEEPSTAKES, PRIZE OR ANY PORTION(S) THEREOF. 9. Winner Notification and Prize Claim: Within five (5) working days after the drawing, each Winner will be notified via Instagram message to the Instagram account provided in his or her Sweepstakes entry (a “Prize Notification”). Sponsor shall have no liability for any Prize Notification that is lost, intercepted, or not received by the potential winner for any reason. In order to claim a prize, each Winner may be required to provide his or her full permanent mailing address information and social security number or tax identification number for purposes of compliance with tax regulations. Upon Sponsor’s request, each Winner must also sign and return a release of liability, declaration of eligibility, and/or a publicity release. If a potential winner does not respond within forty-eight (48) hours of the Prize Notification (or a shorter time if required by exigencies), if the prize(s) or Prize Notification is returned as unclaimed or undeliverable to such potential winner, if a potential winner fails to comply with any of the verification or release requirements identified in this Section within fourteen (14) days of request, or if the potential winner is found to be ineligible, has not complied with these Official Rules, or declines the prize(s) for any reason prior to award, such potential winner will be disqualified and forfeit his or her prize, and an alternate Winner may be selected by the Sponsor from the pool of remaining eligible Entrants. Sponsor may successively attempt to contact up to five (5) potential winners in accordance with such procedure, and if there is still no confirmed winner of a prize after such attempts have been made, Sponsor may announce an alternate means for awarding that prize. The Winner must take possession of the applicable prize in the manner directed by Sponsor. Failure by the Winner to comply with any of the foregoing may result in disqualification. It is the sole responsibility of Entrants to notify Sponsor of any changes in name or contact information. In the case of a minor, Sponsor may award the prize to such minor’s named parent or legal guardian. 10. Representations: By entering the Sweepstakes, each Entrant represents to Sponsor that: (i) the Entrant meets all eligibility requirements of the Sweepstakes; and (ii) Entrant understands and agrees that he or she shall not become, through participation in the Sweepstakes, an employee, agent, partner, joint venture, franchisee, or fiduciary of Sponsor. 11. Release of Liability: To the maximum extent permitted by law, by entering the Sweepstakes, each Entrant agrees that neither the Sponsor Parties, nor any prize manufacturer or provider, nor any advertising or social media platform, such as Facebook or Twitter, on which the Sweepstakes may be advertised or through which it is accessed, is responsible for and, to the maximum extent permitted by law, each Entrant releases and holds harmless the Sponsor Parties, each such prize manufacturer or provider, and each such advertising or social media platform, from any and all responsibility, liability, claims, injuries, damages (including but not limited to direct, indirect, incidental, consequential, punitive, statutory, or other damages), losses, costs, or expenses of any kind (including, but not limited to, personal injury, death, or damage to or loss of property) arising out of or resulting from: (i) any violation by such Entrant of these Official Rules, the Policies, or applicable law; (ii) Entrant’s participation in the Sweepstakes; (iii) Entrant’s acceptance, possession, receipt, and/or use of any prize (or any portion of any prize) or the sharing or gifting of any prize with any other person; (iv) any printing or typographical errors in any Sweepstakes materials; (v) any problems or technical malfunctions (errors, omissions, interruptions, deletions, defects, failure to capture information or delays in operation or transmission) whether caused by Entrant, printing errors, human error or by any computer, telephone, modem, satellite, online system, server, or other communications equipment or provider associated with or utilized in the Sweepstakes, including any incorrect, incomplete, inaccurate, or garbled information resulting therefrom; (vi) any damage to Entrant’s equipment (such as a computer system or mobile device) caused by accessing the Instructables Site or participating in the Sweepstakes; (vii) miscommunications, or any failed, jumbled, delayed, or misdirected computer, telephone, cable, or other transmissions; (viii) any entry, e-mail, prize package or other material or correspondence that has been tampered with or that is stolen, misdirected, incomplete, lost, late, non-conforming, ineligible, or damaged; (ix) any failure of any postal or delivery service; (x) any other technical or human error that may occur in the administration of the Sweepstakes; or (xi) any events beyond Sponsor’s reasonable control. 12. LIMITATION OF LIABILITY: NEITHER SPONSOR NOR ANY OTHER SPONSOR PARTY SHALL BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE SWEEPSTAKES, ANY PRIZE, OR THESE OFFICIAL RULES, HOWSOEVER CAUSED, WHETHER ARISING IN TORT, CONTRACT, STRICT LIABILITY, OR OTHER LEGAL THEORY, AND REGARDLESS OF WHETHER SUCH SPONSOR PARTY WAS ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, AND ALL SUCH DAMAGES ARE HEREBY DISCLAIMED AND EXCLUDED. 13. Disqualification: Sponsor reserves the right, in its sole and absolute discretion, to disqualify any Entrant who Sponsor determines, in its sole discretion, (i) has tampered with the participation process, the operation of the Sweepstakes, or affiliated websites; (ii) has acted in an unsporting or disruptive manner, to disrupt or undermine the legitimate operation of the Sweepstakes, or with intent to annoy, abuse, threaten or harass another person; or (iii) is otherwise in violation of these Official Rules, the Policies, or any applicable Laws. Sponsor reserves the right to seek damages and other remedies from any such person to the fullest extent permitted by Law. 14. Termination/Modification: Sponsor reserves the right, at its sole discretion, to suspend, modify, or terminate the Sweepstakes at any time for any reason, including without limitation in the event of fraud or abuse, or due to natural disaster; equipment failure; civil disturbance; fraud; technical, administrative, financial, or other difficulties; technical problems (such as a computer virus/ bug); unauthorized intervention that corrupts the administration, security, fairness, integrity or proper functioning of the Sweepstakes; or other causes not within the control of the Sponsor. In addition, if, in the exclusive judgment of Sponsor, the Sweepstakes (or any portion thereof) becomes compromised in any way, Sponsor reserves the right, at its sole discretion, to cancel any method of entry, to void any entries submitted fraudulently, and/or to select winners from among all non-suspect eligible entries received prior to act that compromised the promotion. Should the Sweepstakes ever be terminated before the drawing, notice will be given on the Instructables Instagram page, and Sponsor will make alternative arrangements to award the prizes. Any such changes will become effective upon notice via online posting on the Instructables Instagram page or other means of wide dissemination. 15. Use of Winner’s Information: All personal information collected by Sponsor (including without limitation, an Entrant’s name, biographical data, and city and state of residence) may be used for by Sponsor, or any third party chosen by Sponsor, of any and all information related to the Sweepstakes, including any personal information obtained through the Sweepstakes, for Sweepstakes administration, and other purposes, except to the extent prohibited by law. Without limiting the foregoing, by entering the Sweepstakes, each Entrant grants to Sponsor and each of its respective designees the right to use and publish the Entrant’s name, and state of residence, along with any other information provided by Entrant, both electronically (for example, on the Internet) and in print, in connection with the Sweepstakes at any time, except to the extent prohibited by law. By accepting a prize, the Winner acknowledges and grants to Sponsor and each of its respective designees, without additional compensation or consideration, notification or permission, the right to publicize his or her name, address (city and state of residence), likeness, photograph, voice, company name, and biographical material in any media now known or hereafter devised, throughout the world, in perpetuity, except to the extent prohibited by law. Other than as set forth in these Official Rules, Sponsor will treat any personal information supplied in connection with the Sweepstakes in accordance with the Policies. Please refer to the Policies for important information regarding the collection, use, and disclosure of personal information by Sponsor. 16. License Grant: Any data or information included in entries must not infringe the intellectual property, industrial property, privacy, publicity, or other rights of any third party, and must be suitable for publication to a general audience (i.e. it may not be obscene, indecent, defamatory, hateful, or inappropriate, as determined in Sponsor’s sole discretion). By submitting an entry, each Entrant irrevocably grants Sponsor and its designees the unconditional, irrevocable, and perpetual right and permission, royalty-free, to use any data, information, images, content, or materials included in such entry, in any media now known or hereafter devised, throughout the world for any purpose. Sponsor is not obligated to use any of the above-mentioned data, information, images, content, or materials, but may do so and may edit them in Sponsor’s sole discretion, without further obligation, credit, or compensation. Each Entrant waives all intellectual property rights, privacy/publicity rights or other legal or moral rights that might preclude the Sponsor’s use of the entry or exercise of any rights granted to Sponsor, and agrees not to sue or assert any claim against the Sponsor Parties with respect to such use. 17. Interpretation: The invalidity or unenforceability of any provision of these Official Rules shall not affect the validity or enforceability of any other provision. If any provision of these Official Rules is held by a court of competent jurisdiction to be invalid, illegal, or otherwise unenforceable, such provision will be modified by such court to the minimum extent necessary to make it enforceable while preserving to the maximum extent possible the original intent of Sponsor, and the remaining parts of these Official Rules will remain in full force and effect. Sponsor’s failure to enforce any term of these Official Rules shall not constitute a waiver of that term. 18. Disputes: Except where prohibited, each Entrant agrees that: (i) any and all disputes, claims, and causes of action arising out of or connected with these Official Rules, this Sweepstakes, or any prize shall be resolved individually, without resort to any form of class action, and exclusively by the state courts located in Marin County, California and each Entrant irrevocably waives any objection to the venue and jurisdiction of such courts; (ii) any and all claims made by Entrant, and any and all judgments and awards in favor of Entrant, shall be limited to actual out-of-pocket costs incurred, including costs associated with entering this Sweepstakes, but in no event attorneys' fees; and (iii) under no circumstances will Entrant be permitted to obtain awards for, and Entrant hereby waives all rights to claim, indirect, punitive, incidental and consequential damages and any other damages, other than for actual out-of-pocket expenses, and any and all rights to have damages multiplied or otherwise increased. All disputes concerning the Sweepstakes, the construction, validity, interpretation and enforceability of these Official Rules, or the rights and obligations of each Entrant and Sponsor in connection with these Official Rules or the Sweepstakes shall be governed by, and construed in accordance with, the Laws of the State of California and applicable United States federal law, without giving effect to any choice of law or conflict of law rules (whether of California or any other jurisdiction), that would cause the application of the Laws of any jurisdiction other than California. 19. No Endorsement: Nothing contained in these Official Rules or in any of the Sweepstakes materials should be construed as an endorsement by Sponsor of any third party, product, or service. Prize suppliers are not sponsors of the Sweepstakes. 20. Social Media: The Sweepstakes may be advertised on or accessed through one or more social media platforms, such as Facebook, Instagram or Twitter. However, the Sweepstakes is in no way sponsored, endorsed, or administered by, or associated with, any such platforms. When entering the Sweepstakes, Entrants are providing information to Sponsor and not to such platforms. Entrants agree to comply with all terms and policies governing such platforms in connection with the Sweepstakes. 21. Questions/Winner’s List/Official Rules: The name of the Winner will be posted on a post on the Instructables Instagram page or a dedicated page of the Instructables Site on or after February 24, 2020. The name of the Winner also may be obtained after that date by mailing a written request, along with a self-addressed stamped envelope, (Vermont residents may omit the return postage) to: Winner’s List – Instructables Makey Makey Sweepstakes Jessy Ellenberger Autodesk, Inc. 111 McInnis Parkway San Rafael, CA 94903 All such requests must be received no later than six (6) months after the end of the Entry Period. Questions regarding the Sweepstakes may be directed to Sponsor at: service@instructables.com or (415) 507-5000 These Official Rules will be posted on the Instructables Site during the Entry Period and for six (6) weeks thereafter.22. Intellectual Property: AUTODESK, and Instructables are trademarks or registered trademarks of Autodesk, Inc. in the United States and other jurisdictions. Other brands may be the trademarks of their respective owners. These Official Rules, the Instructables Site, and all other Sweepstakes-related materials and code may be protected by Sponsor’s or third-party copyrights or other rights. Copying or unauthorized use of any copyrighted materials, trademarks, or any other intellectual property without the express written consent of the owner is strictly prohibited.

Topic by jessyratfink  


Is there a way to make an ultrasound-to-sound "audio spotlight" DIY?

Http://en.wikipedia.org/wiki/Sound_from_ultrasoundThe Holosonics Audio Spot Light sells for $2,500, and the competing Sennhieser AudioBeam sells for $4,500.Is it possible to do something like this home-made?

Question by endolith    |  last reply


What is the most flammable aerosol spray( that is cheap) for use with a potato gun? Answered

I just need some sort of fuel to use to launch my potato gun?

Question by uniboob tom    |  last reply


Is this site a scam or is it good? Answered

The site  is: http://horizonnashville.com/ I just wanted to know because i sent them a song and they sent me some information and a contract. The email says: Congratulations! We are impressed with your song lyrics (BLANK) and I’m happy to tell you that we have accepted them to be set to music and Professionally Recorded! We have many credentials and accomplishments and we hope to add your song to our list. With sales, radio air-play, television, motion pictures and live performances a prolific songwriter can easily earn in excess of One Million Dollars! Please open and read the attached letter and contract. Our contract is for your benefit. It protects you as 100% owner of your words and provides that you receive all money that they may earn, in addition to, our "Cash Bonuses"! I look forward to a rewarding relationship. Respectfully, Ronnie James President, Horizon Music (615) 417-1945 www.horizonnashville.com The contract says:                                                                                      SONG RECORDING CONTRACT                                                                                                                                                                                                                           Date: May 25, 2011 Songwriter: Vincent Dolliole I would like for Horizon Music to produce a professional recording of my song listed below: (Blank)                                                                                                                                                     Horizon Music agrees: 1. To compose music for the Songwriter’s words and produce a professional song recording using five Nashville musicians and one Nashville singer. 2. To provide the Songwriter with two compact disc copies of the completed song within approximately three weeks from the date that their contribution is received in full for that song. 3. To submit the song to music industry professionals as Horizon Music deems appropriate. 4. To ensure that the songwriter is paid 100% of all money that may be earned by their words from sales, radio airplay, television, motion pictures, live performances and to pay $80,000.00 Cash Bonus for each song that reaches the Number One position and $20,000.00 Cash Bonus for each song that reaches the Top Ten position in the internationally recognized Billboard Magazine Chart. 5. To edit the Songwriter’s words only for phrasing and commercial time allotment and to protect them from plagiarism to the best of our ability.                                                                     Songwriter agrees: 1. To make a one-time contribution of $369.00 for the song listed above to be professionally recorded. 2. To make a partial payment of $_______________________ (minimum $123.00) and send the balance in payments that are convenient for my budget. I understand that I may use a personal check, money order or use my charge card below. 3. Please charge my: Name on Credit Card: ____________________________ Amount $_________________ Card Number: _______________________________________________ Expiration date: _______________ Check song style preference: ____ Country ____ Pop ____ Christian ____ Rhythm & Blues ____ Rock Print, sign and mail one copy of this contract with your contribution to: Horizon Music, P.O. Box 292006, Nashville, TN, 37229 If you do not have a printer, e-mail us your regular address and we will send you copies by regular mail. _____________________________________ _________________________________ Songwriter’s Signature Ronnie James, President

Question by VinceJDJ    |  last reply


movie ideas anyone??

Hi I'm a filmmaker (i work for Stop Motion Pictures) and am really looking for movie ideas because right now I have nothing! I have movie making block. Any idea I choose to use you will be credited. It will probably not be made in a while I'm working on getting my camera and tools. Please share any ideas! Even stupid ones!

Question by amakerguy    |  last reply


Can we interface SIM800 module with USB to TTL Converter?

I think it is tuff but not impossible.

Question by tandondilip9    |  last reply


How can I build a 150MHz clock?

HI, I need a clock oscillator of 150 MHz for a project. This oscillator must be built up from components and ics and not from a microcontroller. so i have tried to simulate many quartz crystal colspitt oscillators, only I am unable to build high frequency ones.

Question by SirBroccoli    |  last reply


Where can I find soldering instructions for this DIY project?

I bought this kit a year ago. I sat down yesterday to try and build it, but then realized that there are some parts that I'm not sure where or how they go. This kit never came with an instruction sheet. I have a photo showing all the parts and a photo showing what it's supposed to look like when done. I've been searching the net for hours and can't find any instructions. Can anyone help me?

Question by magicka    |  last reply


Can a 9 volt battery generate enough current through Nichrome wire to heat it up?

My son is trying to create a battery powered electric blanket using one or two 9 volt batteries with some Nichrome wire. Will he be able to generate enough current to cause the Nichrome wire to heat up properly? He would appreciate any tips on what wire length he needs or what other options he has for a voltage source. He really wants to make it using a battery.

Question by StuCazzo    |  last reply


LED TORCH CONVERSION(not perversion)

Hello, I have a massive 2million candle power halogen Torch ,approximate diameter of 1.5 Feet,and i want to convert it from Halogen into Led by replacing the Bulb ,??? any ideas of where to start without taking it to Pieces (and finding ive got Pieces leftover !!!!!!!!!!) Thanks, HAIRYGSHOCK63

Question by Hairygshock63    |  last reply


3D printed vortex tube for spot cooling

These tubes are available as industrial supplies by the dozen but quite costly.Tried a few designs available on the net but either they are next to impossible to print using FDM or fail to provide any significant temperature difference.Just to be clear: If amient air temp is 25°C then I would like to get below zero on the cold end.And well, I would like to be able to salvage a small fridge compressor with considerably less air flow than a shop compressor.Now to the problem(s) I face:1: The temp on the cold end is affected by both the length of the tube and by how much air can escape on the hot side.Makes finding a suitable diameter and length quite tricky if you don't have fancy simulation software at your disposal :(2: The standard cylindrical design for the "engine" is not really that efficient :(To make them work a lot of pressure is required, usually they won't do anything below 85PSI and most require about as much air volume as a little air grinder.3: 3D printed parts with complex insides are a true pain to clean, seal and make sturdy enough to last more than a few minutes under these conditions.I am currently experimenting with PETG as it is a bit more temp resistant and stronger.My understanding of these vortex tubes is that the outer vortex, created by the engine, travels up the tube.At the outlet valve the vortext is split so that the fastest and hottest air escapes while the colder air is directed dow, through the outer vortex and at a significantly lower speed for the rotation.Scientists can't really agree on the directions and spin of the inner and outer vortex :(My theory is that the hot air is created by a pressure increase towards the end of the tube.As this also expands the air, the inner vortex will be choked off so to say.Only option for it is to go through and by doing so loosing a lot of pressure on the exit - the stream cools down.The circulation around the vortex spin however means that speeds of well over the speed of sound are reached.I can only assume that at this speed there will also be some energy exchange happening based on the static electricity created where the two stream "rub" against each other.So far only models with a finely sanded inner tube actually performed at all.Will one day have to try using a thick plastic straw as a liner...Questions:1. Do you think a complex, conical nozzle is required?The commercial ones all use them.However I tend to think that a slotted approach might be better.Instead of adjusting the gap of the needle valve two half cylinders with slots can create a finely adjustable outlet.Way easier to desing if all parts shall be printable....2. If 1 is not a a real requirement:How to best design the slots for the correct air flow??In the direction of the rotation?Straight?Or even against the rotation so the air will be forced out onlyby the pressure but not by direction?3. Is there any easy workaround for Sketchup that would allow me to create sphere with the required channels along the inner wall to create a fast vortex?I can do screw, nut and bolts, a sphere is no problem either.But I can't seem to find a way to comine both techniques so they work on the inside of a sphere :(Why a sphere you wonder? ;)I like harmony for these things a an egg or a sphere is way more harmonic than a cylinder.On top of that it would allow to create a vortex to my specs instead of chance.Ideally the "threads" would get a smaller pitch with every turn.This forces the airstream to not olny increase in speed (decreasing diameter) but also to be "compressed" before even entering the tube section.The inner stream would pass through a tube inside this sphere, after passing through the tiny gap the upgoing airstream created.My hope is that such a design would allow for the low flow rates of a fridge compressor while being quite small in size as well.Anyone with good ideas or tips?

Question by Downunder35m    |  last reply


Glue need 2 glue silicone sheet to glass

Hi , I bought 7" square silicone flat pot holders and I want to glue them to the bottom of my Wide mouth gallon sized glass jars to protect them from breaking easilyWhat kind of glue can I use? A glue that will not seep thru the glass.. polluting my water I am using the jars for holding distilled water Thank you 4 your assistance

Question by gerimac    |  last reply


Please help with repairing my LED light bar there are a total of 60 1w leds but 2 sets of 3 LEDs are dimmed.

I was wandering if you could give me a bit of advice on repairing my LED roof light bar, there is issue with 2 sets of 3 LEDs. there are a total of 60 3w leds and for some reason (probably condensation) 2 sets of 3 LEDs (one in the middle and one in the end) get dimmed. Any advice would be greatly appreciated.

Question by survivel82    |  last reply


Hillside Trolley

I have a cabin on an island but have many steps to negotiate when carrying (usually heavy) goods, totes, supplies, materials, etc., etc.Looking at making a hillside trolley to transport materials (not necessarily humans) up a 100 foot slope. Has anyone attempted this? Something like in the picture.Thanks.

Question by dwleo    |  last reply


Squishy Silicone (shore hardness 30-10) with 4 ingredients

I owe my findings to the maker of "Oomoo" and community of hobbyists; thank you everybody! I needed squishy silicone, and the random knowledge I found here helped me with the puzzle pieces. The pink rectangle that you see in the pictures has the consistency of a gummy bear (shore hardness ~10). Grab: GE Silicone 1 caulk (or equivalent) Caulk Gun Odorless Mineral Spirits Baby Oil (Mineral oil) Acrylic Paint Sandwich zip baggies (medium large will help you) Cutting tool Mold negative (I use play doh because I only need basic shapes) Try to avoid glass... Don't use glass. A way to measure Tablespoons ADVISORY- your silicone (should) smell of vinegar and your mineral spirits will be potent of fumes.. and flammable. Use ventilation and protect your eyes. Your only saving grace is the baby oil scent. Okay. Grab the (new) silicone caulk and cut the whole pointy tip off of the tube, making a flush cylinder. Load that bad boy in the gun. Open a plastic baggie, and fill it with: 2 tbsp Mineral Spirits 1 tbsp Baby Oil (Mineral oil) Then shoot one full shot of silicone directly into the oily puddle of liquid. Close the baggie, leaving a little air. Find a way to mix it. I lay the bag on a smooth table and repeatedly iron the baggie with my pinky. You have 20+ minutes pot time, so be thorough. You should now have a clear 'spit' like liquid that runs, similar the two liquids you just mixed. Open the bag. Add: 1 drop acrylic/oil paint Close it, and repeat the mixing until your color is even throughout the liquid. Turn your baggie sideways and cut a small triangle from one of the bottom corners. Carefully tilt the bag like an icing baster and pour the silicone into your mold negative. This method is clean and offers control. You can squeeze ALL of your mix into the pour, as well as combat air bubbles. Don't touch it for 3 hours. Better yet, leave it for three days. It takes this long for the shrinkage to happen. You can avoid shrinkage if you use xylene instead of mineral spirits, but it is not available to me. The color will become opaque in this time as well. You now have very squishy silicone. I have tried many other pours and I can't manage to get the cured squishy consistency without mixing a liquid to start. A goop is preferable to me because I can use it a caulk, still, allowing me to 'draw' silicone positives. To achieve a shore hardness of ~30 Repeat the steps above, but now use: 1 tbsp Mineral Spirits 1 tbsp Baby Oil (mineral spirits) This will have an initially 'goopier' mix, and you will have similar pot/cure time, but no shrinkage. It will be oily until you repeatedly dry it. The picture of four silicone squares illustrates my last advice. Each mix has only one drop of the same pink acrylic paint. You may want to experiment with how much color you want. Far Left: the gummy bear mix 2:1 softest Inner Left: the hardness 30 mix 1:1 Inner Right: FAILURE did not cure (1/2 tbsp baby oil, 1tbsp mineral spirits) Far Right: FAILURE did not cure (2 tbsp baby oil, 1 tbsp mineral spirits) toughest The two squares on the right could have been made with just silicone, mineral spirits and NO baby oil. Maybe, add ~3 drops of glycerin and I could have had the same hardness AND a thurough cure, but I want the squishy. Hopefully this helps.

Topic by VRPlanesWalker    |  last reply


Non-toxic, natural, cheap and WATER-PROOF adhesive or glue, is this impossible?

I'm a quality engineer working for a company in Turkey, the company collects the coaldust ( powder form of the coal )  from all the cities of Turkey and makes them briquettes by pressing with very powerful machines. Of course we use some adhesives for mechanical strength of the briquettes. We use CMC (a kind of cellulose) and this material is soluable in water. So our briquettes are not very durable under rain or moisture. Now I have to change the binder or adhesive materials in order to produce waterproof briquettes. I dont know how it's possible. I have to use nontoxic natural materials, and cheap as well. Last week I tried to do something but we were unlucky maybe. I tried to use Technical Gelatin and Alum (Al. Sulphate ) together, the briquettes seemed very good after production but they were not durable when I left them in a cup of water. So I have to find a solution now. Can you help me about that? I'd be very pleased. Thanks.

Question by enisdogru    |  last reply



Does anyone know how to make a homemade tunnel for kids to play in? Answered

I am looking to make a tunnel for relatively cheap that my nephews can play in. Any ideas?

Question    |  last reply


List of Upcoming Contests (updated 12/16/19)

Hello everyone! Below is a partial list of the 2020 contest calendar. Keep in mind that this list is subject to change and contests will continue to be added throughout the year. The contests below are already in planning, and I've left off ones that we're still trying to decide on. The months indicate when the contests will be launching. All contests will launch near the beginning of each month. Keep in mind that the list below is not set in stone. All contests and dates are subject to change!JanuaryCoffee Speed ChallengeKids Solving Problems Contest Makey Makey Contest Wearables Contest Raspberry Pi Contest Fix It Contest Warm and Fuzzy Challenge Snow Challenge Magnets ChallengeFebruaryRope & String Speed ChallengeAfter School Challenge Meat Free Meals Challenge Crazy 4 Coding Challenge Fiber Arts Contest Heart Contest Paper Contest Trash to Treasure ContestMarchWire Speed ChallengeStorytelling ChallengePCB "badge" ChallengeSpring Cleaning ContestSoft Robots Contest3D Printed ContestWoodworking ContestAprilRubber Band Speed ChallengeIndoor Plants ChallengeSpace ChallengeLeather ChallengeTea ChallengeCars and Motor Vehicles ContestArduino ContestFirst Time Authors Contest *All contests and dates are subject to change. Please leave suggestions for prizes here. You can also leave suggestions about contests here. Have a contest question? Check the Contest FAQ!

Topic by randofo    |  last reply


Rate My Drawing!

This is a portrait I drew of a friend of mine. It took me about 2-3 hours to complete. Please tell me what you think, thank you :)

Topic by FoxyPenguin94    |  last reply


Webcam module pins layout

Which are the pins of this camera HP PN 692893?thanks!

Topic by christ479    |  last reply


What kinds of contests do YOU want to see on Instructables?

Hi everyone! As we're planning contests for the next year, we wanted to get suggestions and feedback on the types of contests we're running. :DIs there a contest we ran years ago you'd like to see again? Any contests you're sick of? A weekly challenge you'd like us to expand on? Do you want the contests to be more specific or more open ended?We're trying to shake things up in contest-land - so any and all suggestions are welcome! I'm especially interested in what types of tech contests you guys would like to see, as well as ideas for food contests. P.S. For anyone wondering about weekly challenges - we're still trying to figure out a way to do it that makes it easy for you guys to enter and easy for the editors here to run. But I promise we are discussing it! :)Have prize suggestions? Check this topic. Want to get a preview of some of our upcoming contests?

Topic by randofo    |  last reply


Convert 5VDC to 3.7VDC?

Hi everybody ! I'm currently working on a speaker project, and I want it to be powered by 4x 18650 3400mAh 3.7V batteries in parallel, but when they are recharged (with a separated 18650 wall charger), I want to be able to power my speaker from a wall power supply. The idea is to get the 5v power supply voltage down to something between 3.7v and 4.2v, in order to mimic the battery voltage. I already chose this one which is a 10amp-capable power supply in order to be sure to always give the speaker enough current (speaker current consumption is between 0,55 at medium volume and 3 amps a maximum volume). I first thought that i would use this board to convert 5v to 3,7v but it's only able to output 1.25 amps max so I need to figure out a way to convert 5v to 3.7-4.2v without loosing a lot of current. I've heard of low dropout regulator (LDO) but I cannot find one capable of delivering 4amps or more... Any help is appreciated ! Mahot

Question by boulou    |  last reply


How to make pet bowls without a kiln.? Answered

I want to make pet bowls from something like polymer clay. i know that polymer is not food safe. Any other suggestions on how to make pet bowls (food or water) without having to fire ceramics? Thanks for the help! :)

Question by silverart    |  last reply


Lithium Ion battery for CPAP machine?

I'm trying to figure out how to power a CPAP machine (this one) for a few nights of backpacking/camping. Does anyone know how to hook it up to a lithium ion battery (and what type to get) with out forking over all my money to the medical supply industry? I'm dying to go backpacking for at least a night or two. any help would be appreciated.

Question by nickbakes    |  last reply


"Open source" marketing research, anyone?

                                  Calling any and all market research buffs!   "I need help finding my target market, but I can't afford to pay the giants in the business who have many many years of experience and probably have an agenda."   I'm sure that has been said, and heard, many times, and now its my turn. I had a thought recently about how I could find a market for a product I'm working on. Since I intend to release it openly, I want most of the side stuff the project spits out along the way to be open as well.   My idea centers around a collaborative and "smart" marketing research system. Of course there would be problems inherent to the system (trolls and SPAM, for instance) that could be remedied in a similar fashion to Wikipedia or Kickstarter. Now that I've put this idea out there, who wants to make it happen?

Topic by The Ideanator    |  last reply


Help wanted in designing a switching circuit.

I have 3 inkbird controllers monitoring 3 beer fermenters. When any of the fermenters require chilling the Inkbird switches 230v to a pump. Problem is that there is a combination of any one on at a time or all three at once or none on. I can’t connect all 3 outputs together to drive the pump as the inkbirds will get damaged. Can anybody draw me a circuit whereby if any combination of of inkbirds switch 230v only one output is switched to the pump. Have attached a diagram showing all outputs connected together but have been told that mains connected across the Inkbird output will probably damage it.

Topic by CBBC    |  last reply


Re-using Smart TV board from dead TV to make another TV smarter...

Hi, I have just bought LG 47GA6400 TV but I damaged LCD screen (CRD31092201) when I was assembling it.  I couldn't find low cost LCD to replace and I started wondering how I can reuse any remaining parts of this TV. Actually there are many people like me wondering what to do with dead Smart TV. Few years ago you would receive a standard advice – throw it away. But today Smart TV parts are powerful and with your help might be re-used again... Here is an example: My LG TV has mainboard with dual core CPU,  Google TV inside and cool remote controller with QWERTY keyboard and tons of applications.... I wish I could reuse it with other, not so smart LCD TV I have.  The only problem, how to connect Smart TV mainboard to a HDMI.  It doesn't have HDMI out, it has only input ports and one LCD interface cable.... Is it a crazy idea to convert LCD interface back to HDMI or VGA ? Can you create an instructables to show how to do that ?

Topic by alexgontcharov    |  last reply


Make: *** [main.o] Error 1

Hi, I have these problems when upload program on ATmega32 microcontroller message:the file [$(workspace_loc/name/release)/name.hex] for the flash memory does not exist or is not readable error on the console:make: *** [main.o] Error 1Please, help me

Question by ashraf.diab22.ad  


Sanding wood smooth without losing rustic saw marks

I've searched for an answer but can't find one. Hoping someone can help me out with this. I recently picked up some old wood boards, about 3" thick, 4' long, and a foot wide. They're fairly old and have that warm weathered look of old raw wood. On one side you can see the nice circular saw marks from when they were milled. They're also very splintery, and I got plenty of splinters when I moved them. My goal: preserve their rustic beauty while making them into usable wood for furniture. I want the surface smooth enough that splinters aren't an issue. How can I sand the boards so they are smoother a micro level, but don't lose the beautiful saw marks? Ideally I'd keep that weathered color, but I suspect I'll lose at least some of that due to sanding and will have to fake it with stain. Thanks a ton for any help! Josh

Topic by joshme    |  last reply


Smallest lower power LED light project

I want to try to put two LED lights on my glasses, the idea would be to write some software to turn it on and of and notify about stuff usps trackingI was wondering what would be the smallest project possible Is there any resource where people just induced a current to light a small led maybe? showbox

Topic by stevejock1    |  last reply


What projects could I do with an industrial electric motor (1 to 7.5 HP)? Answered

My local Habitat for Humanity ReStore has a bunch of used Baldor Brand AC motors for $40. Power ranges from 1HP to 7.5 HP. It seems like a good deal since these things retail for a couple of hundred. I was wondering what I could use one of these for. Also, could I just wire one of these things up to a wall outlet to make it run, or would I need some kind of controller. What considerations should I take in picking which motor to buy? power? 3 phase vs 1 phase? etc?

Question by waltbosz    |  last reply


What is this tool for?

Can anyone tell me what this tool is for?   I came across it all rusted and thought it was some type of pliers or cutter. After I cleaned it up I could tell it was probably neither. What I thought was a plier jaw is actually one piece and does not close and what i thought maybe the cutting blade, actually had lines and numbers, like a ruler. The one small screw that the spring is attached to, will allow you to adjust how far the jaw/cutter will close and the other screw, when loosened a bit allows you to slide the little metal 'arm' in or out, like a measuring template. It has some fancy designs on the handles as you can see and the only marking says "Made in Western Germany".

Question by millsy22    |  last reply


Food Grade epoxy for making bongs, water pipe? Answered

Hello, Im thinking about trying to make a bong or water pipe out of epoxy resin, what kind of food grade resin should I use? I cant find answer anywhere as it should be quite safe and should not give any additional taste? FOR TOBACCO & LEGAL USE ONLY!

Question by ArnasL    |  last reply


programming a stealth USB caps locker problems? Answered

I have a problem programming my stealth USB caps locker (link)  the PCB is ready, the components soldered on, and ive made connections to my ghetto programmer. now, i opened programmers notepad and wanted to program it, but now it just gives a whole load of errors: > "make.exe" program set -e; avr-gcc -MM -mmcu=attiny45 -I. -g -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=main.lst  -std=gnu99 main.c \     | sed 's,\(.*\)\.o[ :]*,\1.o \1.d : ,g' > main.d; \     [ -s main.d ] || rm -f main.d main.c:19:20: error: usbdrv.h: No such file or directory main.c:20:21: error: oddebug.h: No such file or directory Compiling: main.c avr-gcc -c -mmcu=attiny45 -I. -g -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=main.lst  -std=gnu99 main.c -o main.o In file included from main.c:16: c:/winavr-20090313/lib/gcc/../../avr/include/util/delay.h:85:3: warning: #warning "F_CPU not defined for " main.c:19:20: error: usbdrv.h: No such file or directory main.c:20:21: error: oddebug.h: No such file or directory main.c:25: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'reportBuffer' main.c:26: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'idleRate' main.c:27: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'reportCount' main.c:33: error: 'USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH' undeclared here (not in a function) main.c: In function 'buildReport': main.c:65: error: 'uchar' undeclared (first use in this function) main.c:65: error: (Each undeclared identifier is reported only once main.c:65: error: for each function it appears in.) main.c:65: error: expected ';' before 'key' main.c:68: error: 'reportCount' undeclared (first use in this function) main.c:69: error: 'key' undeclared (first use in this function) main.c:73: error: 'reportBuffer' undeclared (first use in this function) main.c: In function 'timerPoll': main.c:87: error: 'reportCount' undeclared (first use in this function) main.c: At top level: main.c:104: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'usbFunctionSetup' main.c: In function 'calibrateOscillator': main.c:143: error: 'uchar' undeclared (first use in this function) main.c:143: error: expected ';' before 'step' main.c:144: error: expected ';' before 'trialValue' main.c:149: error: 'trialValue' undeclared (first use in this function) main.c:149: error: 'step' undeclared (first use in this function) main.c:150: warning: implicit declaration of function 'usbMeasureFrameLength' main.c:157: error: 'optimumValue' undeclared (first use in this function) main.c: In function 'main': main.c:193: error: 'uchar' undeclared (first use in this function) main.c:193: error: expected ';' before 'i' main.c:194: error: expected ';' before 'calibrationValue' main.c:196: error: 'calibrationValue' undeclared (first use in this function) main.c:200: warning: implicit declaration of function 'odDebugInit' main.c:201: warning: implicit declaration of function 'usbDeviceDisconnect' main.c:202: error: 'i' undeclared (first use in this function) main.c:205: warning: implicit declaration of function 'usbDeviceConnect' main.c:211: warning: implicit declaration of function 'usbInit' main.c:215: warning: implicit declaration of function 'usbPoll' main.c:222: warning: implicit declaration of function 'usbInterruptIsReady' main.c:222: error: 'reportCount' undeclared (first use in this function) main.c:224: warning: implicit declaration of function 'usbSetInterrupt' main.c:224: error: 'reportBuffer' undeclared (first use in this function) make.exe: *** [main.o] Error 1 > Process Exit Code: 2 > Time Taken: 00:03 maybe its this: ""Download capslocker.hex and use AVR Studio or a standalone programming tool to write into the ATTiny45 Flash. Oh, you'll also need to select the fuse for PLL/1k clock source." thats what the maker of this thingie said, but what is the fuse for PLL/1k clock source? could it be that? when i use the .hex file, i get about the same. whats the problem? i didnt change anything.

Question by godofal    |  last reply


I have an odd question about PVC glue? Answered

Hello my question is why dose the glue spin when it is dripped in water?  I work for a small plumbing and sewer company and I have noticed that every time the glue drips in a puddle it spins on the surface. It is pretty neat and I was curious as to why it dose that. 

Question by vince 09    |  last reply