Topics


hooking up a 9-volt battery to a lazer pointer

Have you ever had a lazer pointer that was really fun, but then ran out of batteries? those little replacement batteries are hard to find. while I was supprised there weren't any instructables on this, I'll be posting one soon. I know how to use a 9-volt battery to power the lazer pointer again. this fuel cell is easy to find, and easy to work with. comments? are you interested?

Topic by mexx.admin    |  last reply


Cigarette Odor

Hi, I need help in getting rid of the cigarette odor from my room. Thank you for reading this. Elearner

Topic by Elearner    |  last reply


Why do my feet sometimes smell like malt vinegar? Answered

It's not every day or with all shoes, or only after eating cod at the pub...

Question    |  last reply


I observed suddenly my car stops while driving, steering wheel becomes hard and speedometer stop working, why? Answered

My car model is Honda CITY 2005 its dolphin type and i don't have any clue about this, please help me! thank you.

Question by SunilB5    |  last reply


Diagonally cutting across a plywood cylinder?

I want to make a couple of identical circular wedged speaker enclosures by cutting a large drum shell (16in by 16in floor tom) in half diagonally and then capping the open sides with discs, what would be the best/easiest method of holding the shell in place and making an accurate straight diagonal cut?i have access to a maker space but i haven't been in since their recent refit so i'm not sure what cutting machines they now have...

Question by ambientvoid    |  last reply


Can I get reasonable energy by placing a working LCD TV screen panel in sunlight and use it as a solar panel?

I have been given a large Sharp AQUOS G Series LCD TV to pull apart. I read recently that if you place LEDs in sunlight they will act like miniature solar panels and give of some usable electricity. What Id like to know is I place a more advanced light emitting device such as the LCD TV screen in the direct sun light will it produce more usable energy? Even if it was10 percent that of good solar panel, recycling LCD screens from the dump might be worth while? Thanks for your help!

Question by jojabo7    |  last reply


bubble wall?

Hi everyone! I am not a tech .. I am just a girl who loves to create odd things and gets really excited about making cool freaky lights in my house. I would like to find an inexpensive way to build a bubble light wall.. like make it big and part of the wall itself. I have some concept of what I need to do already, but am perplexed at how to build the tank itself .. like an 1nch or so deep .. but if anyone has any good ideas for this I would really love to hear them. also... would it be better to use panels or one large tank .. or if there is anything premade that i could convert into this. Thanks =)

Topic by lil devils x    |  last reply


Flash Powder Problems!!!!!

Every time I use flash powder from firecrackers to try to make a big one all it does is burn up. No matter how hard I try to compress the flash powder all it does is burn up when it is supposed to blow up. Any tips?

Topic by joeskater26    |  last reply


Instructables Maker Buddy Instagram Sweepstakes

We're hosting our first-ever Instagram Sweepstakes! This is your chance to win a phone video gimbal for you and a buddy! This nifty gimbal is great for boosting your storytelling for Instructables posts and Instagram stories! (Sorry folks, limited to the US only)Unlock your inner vlogger and head to our Instagram page for Instructions on how to enter: View this post on Instagram A post shared by Instructables.com (@instructables) on Dec 13, 2019 at 11:13am PST Official Rules BelowInstructables Maker Buddy 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. Sweepstakes Description: Comment on the Instructables Maker Buddy 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.General Conditions: The Instructables Maker Buddy Sweepstakes (the “Sweepstakes”) is sponsored by Autodesk, Inc. (the “Sponsor”). The Sweepstakes will start on [December 13, 2019 at 12:00 AM (PT)] (“Start Date”) and end on [December 16 2019 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.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-trademarks/privacy-statement, and other policies applicable to and available for review on the Instructables website at https://www.instructables.com/ (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. 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.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 Maker Buddy 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. Winner Selection; Odds of Winning: On or around December 18 2019, 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. Prize: The total estimated retail value of all of the prizes to be awarded in the Sweepstakes is $262. 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$131) EVO Shift Hand held 3axis gimbalInstructables T-ShirtInstructables NotebookInstructables PinPrize Pack #2 (Estimated Retail Value: USD$131) EVO Shift Hand held 3axis gimbalInstructables T-ShirtInstructables NotebookInstructables PinEvo Gimbals 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. 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.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.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.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. 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.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.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.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. 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.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.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.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.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.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 December 18, 2019. 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 Maker Buddy SweepstakesAudrey LoveAutodesk, Inc.111 McInnis ParkwaySan Rafael, CA 94903All 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 (310) 396-1167These Official Rules will be posted on the Instructables Site during the Entry Period and for six (6) weeks thereafter. 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 audreyobscura  


How do I fix my jukebox? (1976 Wurlitzer Baltic)

Hello, lovely people!I have a 1976 Wurlitzer Baltic jukebox that has started to misbehave. The needle arm lowers, then jerks slightly, coming down pretty much in the middle of the song, then at the end of the song, the arm is supposed to raise back up, and the record should be returned to the carriage, but now it's stopped doing that.I've spoken to a couple of jukebox servicing-type-people and they've said it'd cost more than the jukebox is worth to get it properly serviced and fixed (it's not a popular model), so I turn to you guys. I'm happy to do the work myself (if possible), but I want to properly understand what's actually wrong with it before I start poking around and potentially making it worse.Some sub-standard video of the the problem here and here, and I've included the only copy of the service manual I could find. Before it came to me, the jukebox lived in a student union bar for many years, so I imagine it wasn't particularly well taken care of. I love this machine very much, and I hate that it's become basically unusable. Any advice or help you can give would be very gratefully received.Many thanks in advance,Kath

Question by wakefiek    |  last reply


How do I make a circuit that acts like a set of radio buttons, i.e only one LED can be selected at a time.

I'm trying to make a timing light for use in toastmasters and would like to know of any IC's that can help me out. I've already come up with 2 possible solutions, but both seem more complicated than necessary. All I want is to have 3 LEDs with 3 associated push buttons. Any time an LED is selected via a button, any LED that was already on turns off, so that only one LED is on at a time. A rotary switch would be perfect for selecting one LED at a time, however I am looking for a low profile solution, and also something that can be used with one hand while attached to a small light weight device. It seems like there should be an IC for this, but I don't have much experience with them and don't know what this functionality is called. Any advice is appreciated. Edit: I'll also mention that I'm looking for a solution under $50 and that uses parts that I can source locally (both possible solutions mentioned above meet these requirements so I'm not very flexible on this).

Question by NoFiller    |  last reply



Battery run bluetooth class d amp - help me fix the noise problem.

Hello, I am designing a small bluetooth battery powered portable speaker enclosure/boombox. At the core of this design is a cctv li-ion battery that has 12v and 5v USB output ports. Its a great start to a boombox, or at least I thought it was. From that battery, I am powering two things. A parts express Stereo Bluetooth Module, (running on the 5v USB) and a Lepai 2020 tripath amp, running on the 12v Perfect you say. Thats what I said. Plug it all together.... huge huge huge garbage noise, with digital clicks and beeps. All three components work fine on their own. The amp plays cleanly with bluetooth modules that have internal lithium batteries, the bluetooth module sends a clean signal to amps not sharing a power source. I had a proficient audio repair man attempt to filter out the noise with resistors placed in numerous places, but it only slightly lessened the noise. Unfortunately I didn't document what he tried. I have attached a photo of the setup (without the speaker attached) I noted one thing... that if one was to connect the bluetooth using the rca input to the amp, if you only touched the internal rod to the inside of the female rca jack on the amp, keeping the outer shielding free from the amp, it would clearly make the noise, with no change in the noise when you pushed the plug all the way on, touching the outer shielding. That seems of interest. Yes? Let me know if I can clarify any more of this. Any help would be most appreciated! Thanks, Tor

Question by torclausen    |  last reply


import NFL win/loss data in to Excel? Answered

Hi, i have 2 Sheets in excel with the team names going Across & Down to form a matrix. 1 Sheet for Home Games, 1 Sheet for Away. is there any way to import that data into excel. (Picture to Show Layout)

Question by furby    |  last reply


Microcontroller help!

So I'm working on a project to build a binary clock style watch, though I have very limited experience and knowledge about circuitry and microcontrollers. As of right now I have found a relatively simple project on this site I wish to replicate and downsize to fit in the size of a watch. The design of the circuit is based off the layout in this project:https://www.instructables.com/id/Simple-Binary-Clo...Now I have read up on microcontrollers and microprocessors. I also read some stuff about oscillators and how they can work to essentially synchronize the internal clocks of microcontrollers making them more accurate for clock uses. First is this true that a crystal oscillator can improve the accuracy of a microcontroller? And if so, how could I add a 16.000 Mhz crystal oscillator to the circuit presented above? (I want to use a 16.000 Mhz oscillator because the code written for the microcontroller is based on the 16 Mhz internal clock, so this should line up fine)Thanks if you can answer these questions!

Topic by Tman179    |  last reply


Circuitry help needed!

So I'm working on a project to build a binary clock style watch. I have found a fairly simple system to replicate though I plan to downsize the circuit to fit within roughly a 40x40mm area, the height I am not too concerned about right now. Here is the link to the project I plan to replicate:https://www.instructables.com/id/Simple-Binary-Clo...Now with the circuit presented I plan to break it into two boards(possibly three). The top board would utilize 2.8x3.2mm LED chips and connect them properly for the ATtiny and shift register. The second board would house the resistors, ATtiny, shift register, and buttons. It would connect to the LED board via vertical wires that would pass through the LED board and hold it directly above. On the bottom of the second board would be the battery holder and wires to directly connect the positive and negative leads to the needed inputs from the backside of the board. This would result in the second and third boards being back to back. (And I do plan on designing and etching my own boards for this project)So my questions for you are:I want to add a 16.000 Mhz crystal oscillator to the circuit to increase the accuracy of the internal clock of the ATtiny, so where would I add it in?How could I reduce the output power from the battery to run the system on minimal power so that my battery can last a year or longer?And is there such thing as a dual sided pre-sensitized pcb board I could use to make the circuits?

Question by Tman179    |  last reply


Can I fill my tires with water so that I know where they're leaking from if they're punctured?

I suspect my tires are punctured and Can I fill my tires with water so that I know where they're leaking from if they're punctured?

Question by Jaime Kathy    |  last reply


I have a Galaxy bench grinder 6" on which the push- pull switch has failed

Assembley diagram for BGS8-076 PUSH OFF-PULL ON switch, can anyone help

Question by MarkS773    |  last reply


How do you enable the hdmi port on your computer?

I have a laptop with a hdmi port I have read elsewhere that I need to 'enable' it in order for it to be used How do I do this? and is it an input or an output or both?

Question by Jareadx    |  last reply


IGBT ZVS Induction Heater?

Among the many tutorials for building an induction heater out on the internet, there are two primary types. Some heaters use a ZVS circuit, and are quite simple but generally limited to a power of around 1000 watts, not enough to melt most metals. Other heaters use PLL controllers and coupling transformers to add charge the primary coil/capacitor loop, and these can be much more powerful but are significantly more complicated (and expensive) to build. It seems the limiting factor in the power of the ZVS circuits is that they can use only 2 MOSFETs, and each must conduct large amounts of current. However, if these could be replaced with IGBTs, which could conduct far more current, a much more powerful ZVS induction heater could be built. Is there any reason IGBTs couldn't be used for a ZVS heating circuit?

Topic by PleaseWork55    |  last reply


Driving Simulator - Google maps

A perspective version of 2D Driving Simulator on Google Maps work-in-progress, using new Map3D class of Google Maps API for Flash.http://geoquake.jp/en/webgame/DrivingSimulatorPerspective/(choice of car or bus)

Topic by lemonie    |  last reply


Why doesn't my windmill generator seem to charge the batteries?

Hi there, I figured Id post here because I have no one to ask and answers aren't obvious from googling. The connection is as follows: - (0 Volts to 40 Volts open voltage) Windmill to a 12 Volt Battery. - (0 Volts to 20 Volts open voltage) Solar Panel to a 12 Volt Battery. A solar panel has an open voltage @ 19.95 Vdc and delivering 0 amps.  The panel is not connected.   Then I connect the panel to the 12 Volt Battery.  Now, the solar panel now shows a voltage of 14 V and delivering 2 amps into the battery. That makes sense to me.  When connecting the solar panel to the battery, the system is now "on load", so the voltage drops.  But because the voltage drops, the amperage is being sent into the battery. ---- Now,  The windmill has an open voltage between 0 and 40 vdc.  On average it shows 20 volts when spinning. 40 volts when its faster.  Its known that it takes 14.1 volts to start charging a battery.   So, now lets assume the windmill is spinning @ 40 volts open voltage.   I connect the windmill to the battery.  For under a second, I see amperage go from the windmill to the battery.   The amperage amount is 3 amps for 1/4 a second, 0.6 2/4 of a second, then eventually 0. The voltage after connecting the windmill to the battery is the same as the battery voltage.  In my eyes, its not charging the battery, because amperage dropped to 0. As a side note, as soon as I connect the windmill to the battery, the generator/turbine, also slows down in speed.   I am also curious to know why it is slowing down as well.   Anyone have any ideas? - U

Question by useful1    |  last reply


How to drop voltage on a 12v car battery to 6v for an old tractor of with 6v

I have an old tractor with a 6v system and i would like to put a 12v battery in it and for a couple other projects i would also like to know how to do this. thanks ron fancher

Question by flagman12    |  last reply


Where can I buy cheap land and legally live in a tent or yurt full-time?

I was wondering if anyone knew of a state or town in the US where I could buy a small, cheap piece of land and legally live in a tent or a yurt full-time? I really didnt even know where to begin looking for advice on this....So Im hoping some awesome person on this website will have ideas. These are the things I am more specifically looking for: I would like to move to an area that doesn't get much (if any) snow. I would like to buy no more then about 5 acres in the woods somewhere, and do NOT need utilities or buildings, and I would be fine living on logged land and possibly "problem land". The land would have to have access by road...And preferably no further then 30-40 minutes from a town. Oh, and I won't live in Florida. If anyone has any ideas or suggestions, please let me know! Thank you!! Ryan

Question by Findnfreedom    |  last reply


K'nex: The bane of modern DIY

Okay, We all know that K'nex is fun, and nearly everyone remembers playing with them when they were young. BUT, I have found that nearly every time that I try to find an Instructable on ANYTHING half or more of the title results come up as something like this "Seuper-Ultra Awsum L33T K'nex thing". We all know that K'nex is fun, but is it really necessary, that every time that your 8 year old son, (or, 8 year old self for that matter) builds something out of K'nex that looks remotely like ANYTHING you go post an Instructable on it. Now, I am not trying to bash on K'nex here, in fact, I love them, but I hate when people think in is necessary to torment the rest of the world with their primitive creations. Then again, this is just my opinion, please post your own. Long days, and pleasant nights, Aztof Du'Reth

Topic by Aztof    |  last reply


Has anybody tried painting LEDs?

Because the colors available just aren't enough and we want more. *glances at collection of smt LEDs then at collection of nail polishes* The odds of me blowing up an LED or setting something on fire are slim, right?

Topic by aliasjanedoe    |  last reply


How do I enter a contest with an existing instructable?

I made an instructable and want to enter it in the fashion contest, but when I click ENTER NOW!, all it says is create a new instructable. Any ideas on what I'm doing wrong and how to enter? Thank you.

Topic by Farm Fashion    |  last reply


I can't find my instructable

Hello!  I've seen it's been there a couple of times, but I don't know what should I do. I wanted to publish my instructable , but it didn't show up in recent, Also I can't find it with keywords. Only way it can be seen is through my profile. I read something about filters. What should I do to don't end in them?  Thanks everybody for answers! Eldalote

Topic by Eldalote    |  last reply


Vintage Sewing Machine Repair

I acquired a older sewing machine at a thrift shop, but it needs a little work. There appear to be two issues, possibly interrelated:-The motor makes a strange intermittent screeching noise after the machine has spun up for a few seconds, and smells like ozone. I think the commutator is arcing. I'm not entirely sure though, I'm no expert on universal motors.-The hand wheel sticks at one point during the revolution. This occurs when the needle, as well as the feed dogs, are fully up.I'm guessing the sticking is demanding too much toque from the motor, causing the weird sound and smell. Regardless, de-gumming the thing and getting smooth motion seems to be the logical first step. I've applied mineral oil to all the moving parts I could find that looked like they would benefit from it. Now the motion is extra smooth, until it sticks, just as bad, and at exactly the same place.I'm a bit stumped. Any ideas on what I should try next?

Question by RelaxedSoup  


Which tools are a must have as a rookie?

I want to start building some furniture to start a workshop and to storage stuff in my own room. What did you found really useful at the beginning?

Question by Aarphel    |  last reply


Advice to build a tank to film dunking a basketball!

Hello!Here’s my challenge! I need your help. Could you recommend a build for this project?I’m looking to build a solution so I can film myself dunking a basketball. I would like the shot to follow me as I approach the hoop from about 10-15 feet away. My idea is a tank with a mounted GoPro onto it, possibly on a tabletop tripod as well.My budget is $50-100. The tank would need to move simultaneously with me as I approach the hoop. I thought perhaps a line tracking sensor could work, I could lay a piece of contrast tape on the solid colored basketball court. Or if I can program a movement with proper timing. Whichever is easier.I chose a tank versus car so that it would reduce vibration and steadier shot. Also a tank is sturdier so in case the ball flies over and hits the tank and camera.I don’t have any programming or robotics experience, but I’m a quick learner. I’d rather not tinker too much, and just want to have a working solution so I can focus on dunking!thanks for your help!Bhere’s a possibly chassis: OTTFF Robot Tank Chassis Track Compatible with Arduino Tank Aluminum Alloy Chassis Raspberry DIY STEM - Speed of 20m / min Maximum Load 2kg https://www.amazon.com/dp/B07C2Q63XG/ref=cm_sw_r_...

Question by bsee20  


Microphone re: Firestart tv and concerns of privacy

I have one of those new 55 in Firestart Tvs . Do I have privacy and security knowing the microphone is not spying on me? Is there any hidden cameras in these tv.s. I really wish I hadn't bought this type either.I don't use it and hate when I accidently press microphone. Going to try to get help getting the microphone out.

Topic by SE60    |  last reply


Hang glider

I'm thinking about building a hang glider, just for low altitude ( nothing more than 30-0 feet) but i have no experience, any suggestions for building?

Topic by hedgiehog    |  last reply


Best way to carve circles?

I’m carving a walking stick into a snake I need to carve the scales of the snake (6mm) I have bought many attachments now but they don’t fit onto my dremel or drill I can only find bits that will make a complete hole which I don’t want Can anyone help?

Question by Jasmindolly    |  last reply


Can't enter competitions

Howdy, I've recently published an Instructable and I can't enter it in any comps. The 'ible doesn't appear when I go to the competition site and try to enter it. Any help would be much appreciated.

Topic by lonesoulsurfer    |  last reply


How to enter?

I entered the converse back-to-school contest last night, but my instructable hasn't appeared in the recent entry area in the converse back to school contest. Is there some kind of criteria or set of rules that I missed? Is it just waiting to be checked by a moderator? Can entries get rejected?

Topic by Lizander    |  last reply


Will letting a pressure washer run without water will tear up the insides of the pump? Answered

Im repurposing it to maybe be a vacuum pump. The outside connections fell to peices and we were going to throw it out, so I might as well recycle it.

Question by The Ideanator    |  last reply


Where, in the US, could a person get away with living in a large tent for free? Answered

I am looking for ideas (of ANY kind) on where in the U.S. I could live (FULL -TIME) in a decent size tent FOR FREE. Is there land that I can live on for free in my tent?? I would like to stay in areas where it doesnt get too cold year round, and doesn't snow at all....But that isn't "set in stone". I really would like to just get away from the crazy, busy city and all that comes with it...And I want to live as free as possible. And by "free", I mean I would like to live rent free outdoors. Once I am able to do that, I think I will feel more free as a human being. :) Thank you for any ideas or suggestions!! ~~~~~~~~~~~~~NEWLY ADDED TO THIS TOPIC FROM AUTHOR:~~~~~~~~~~~ I also posted this in reply to someone's message to me on this site...But I wanted to make sure everyone else read this too because it gives more info on what I am trying to do: This is just gonna sound crazy...But I have 2 cats that I will be bringing with me on the road. I refuse to leave them behind cuz they have been with me through a lot of things in my life, and they are like my kids now! lol! So I have to make sure they have a living space to run around in and get proper excersize (hence, why I am choosing to live in a large canvas tent that will be about the same size as my studio apt that I currently live in). I am choosing to live in a canvas tent because I believe that it will be the CHEAPEST, safest, sturdiest, large enough structure for me and the "kids" to live in for a while. I am also planning on buying a van to travel in for this adventure. I think it will be the easiest and CHEAPEST way to transport me, my cats, and the large canvas tent to where I want to go.                                            

Question by Findnfreedom    |  last reply


Ethercon/ dmx tester

I have this:I have ethercon I have xlr 3 pin male and female 1= ground 2=negative 3= positiveI have dmx 5 pin male and female 1= ground 2=negative 3= positive 4= spare negative 5= spare positiveEthercon to 4 pair dmx/ xlrPinout ethernet to 4 pair dmx/xlr : start with ethernet pin 1-8 and shieldethernet p1= p2 xlr (xlr 2)ethernet p2= p3 xlr (xlr 2)ethernet p3= p2 xlr (xlr 3)ethernet p4= p3 xlr (xlr 1)ethernet p5= p2 xlr (xlr 1)ethernet p6= p3 xlr (xlr 3)ethernet p7= p2 xlr ( xlr 4)ethernet p8= p3 xlr ( xlr 4i like to make this: a tester to test both ends of ethercon, male and female xlr 3 pin, male and female dmx 5 pin.but also ethercon to xlr 3 pin 1, 2, 3 and 4 / dmx 5 pin 1,2,3 and 4xlr 3 pin male to dmx 5 pin femalexlr 3 pin female to dmx 5 pin maledmx 5 pin male to xlr 3 pin femaledmx 5 pin female to xlr 3 pin malethe tester contains 2 times 9 leds 1 side is 8 green leds the other side is 8 red leds, led number 9 on both ends is ground and is color green and red hopefully not too much info but this is what i like to make, a fast en cheap tester.

Question by HectorS76  


Full Size Bunk Beds with corner Stairs

Does anyone have plans for building full size bunk beds? I am looking to build two sets of beds in an L shape with one set of steps going up to both tops. Stairs will be in between the two beds.

Question by ingrambrad5  


How to make 4G/LTE signal booster ?

Hello,I need your advice regarding making 4G/LTE signal booster or some small antenna that would contribute 4 - 5 db boost for 4G signal.so if you can suggest what I can do, but it needs to work.because on google you can find a lot diy projects that are not working...Thank you

Question by Chief.Wolfinjo    |  last reply


FPV Video Transmition with Raspberry pi 3 B V1.2 + OpenCV + MAVLink

Hello, everyone!I would like to conceive a system for image recognition for my drone using raspberry pi 3 B. I see this system as an alternative to the one I was trying to use with the receiver RC832, the transmitter TS832 and an USB Grabber Easycap, because I had a lot of trouble trying make it work. The problem was that I couldn't at all stream the video with opencv using this.So, I was guessing if there is a way of using the transmitter and receiver TS832 and RC832 with the raspberry pi in order to send the video for my laptop. This video has to be integrated with my programs of autonomous flight using MAVLink.

Question by Livia000    |  last reply


Peltier thermoelectric heat pump, can it be used as Solar Generator?.

Can a 40 mm square Peltier thermoelectric heat pump be used as a solar generator It operates on 13 Vdc @ 5 Amps. Operating at 13 Vdc, we measured the hot side at 190 Deg. F and the cold side at 55 Deg F. I have a 6 foot reflector dish and can add Reok led tracker. How many watts will it generate if it does?. Thanks for your help

Question by talei1    |  last reply



Where can we find more detailed pictures of the Tesla Radio?

We are trying to build the Tesla Radio for a science fair and can't get any noise from it.  Is there any other photos that we can see to check our connections?  The diode is getting no reaction.  We read that we have to hit it from a specific direction but none seem to work.  Any suggestions?

Question by notaek98    |  last reply


how to build a tesla radio? Answered

I need to make tesla radio as a fun project.

Question by nerd7473    |  last reply


Batch file zip

I need a batch file that will zip up text file with a password that resides on a network drive. Can some one help me with this?

Topic by computerguy    |  last reply


can i connect 2 amplifiers together (parallel) with the same inputs to increase the output power? Answered

If i have 2 of the same amplifiers or very similar, can i connect them to the same inputs and join the outputs together. will this increase the output power of the system? they are both old amps and are expendable. i have some fairly powerful speakers that will take double plus what the amp already puts out. - headphone to component audio cable (L/R) - split both the L and R channels - connect to amps and adjust to similar settings - connect both the R outputs into one speaker (making sure to match the +/-ve ) and same again with the L outputs.

Question by grimgroper    |  last reply


PVC pipe frame for a 3d printer Answered

Hello, I would like to know if anyone has any advise about building a 3d printer with 1/2 inch pvc piping. The pipe will be used for the rails, because they are cheaper than metal rods. I want to modify t connectors so that they are what slides along the pipe.The pipe will be parallel, and held together by right angle elbows. I will mount it on a flat board. Is there any problems I may encounter? Thanks for any help.

Question by jbaker22    |  last reply


Why did my avocado split?

I did something totally different. I tried the toothpicks insert in the avocado...waited forever. Nothing. Then I just stuck it in a potted soil container (say about 3 weeks) and I water it mostly everyday...(moist). Then I noticed that my seed (pointed side up) cracked all the way down and it looks kinda brown, like mush. I do notice that a small "root" is sneaking out...Is this the process? What do I do now?  This is my first time ever growing an avocado. Thanks so much.

Question by Gardengurl    |  last reply