Hackduino-like thing help!? Answered

First a little background to help you understand whats going on... I live in the Philippines, i grew up here and part of my hobby is Electronics. I usually scrounge up parts due to the fact that parts are kinda outta my reach and it's a shame to let all that money go to waste when i can find salvaged parts. Recently, i got the idea of programming and searched around 'ibles for pojects on TI's MCUs. Finding none, i thought it wouldn't be worth the effort to try to program one of these with lack of info so i thought "what about the arduino?". Arduinos are kinda popular here but one thing sets me back. Getting one. So since my mom won't let me get an arduino (i'm a High school student), i need to resort to making one. Most of my sample requests from Atmel have been denied so it's time to quit being a cheapskate just for arduino! (and for science yay!) I sourced some parts, haven't bought the most important ATmega328 (it's kinda big but better get it than upgrading) and i'm starting to prepare. I read the HackDuino and i just need some help and info such as: * How do i make an arduino using common electronic parts? * What schematic will i use that will allow me to upload using a serial port? * How will i prepare the chip without another arduino? (I heard about bootloaders and stuff) I have lots of questions, but if you know some arduino tips and facts, you may throw it in Thanks in advance

Question by beehard44 8 years ago  |  last reply 8 years ago


can i make an touch screen mp3 player

It uses this kit; http://www.liquidware.com/shop/show/SK/Starter+Kit and this SD Card Shield for Arduino and it has to be under $300 jnluding software

Question by taterkiller 9 years ago  |  last reply 8 years ago


How to make a homemade z board using arduino uno?

Hey Frnds! Well the quetion is clear from the heading. There is going to be a science exhibition in our school and we think that a homemade zboard can be a very good thing because noone knows about it in our school. (how sad it is....).           I'm a beginner in arduino but i figured out that we will store the values of S1 and S2 in two different varibles. Then test for which one is bigger. Then if S1 is bigger then we'll turn the motor forward else it will be turned backward. I know there is some mistake in this program because how we'll stop it if we want to. And i also dont know about the hardware of the z board. Can any one plz help. Like with the Motor Specifications, Force sensor values, powersupply, wheels ( are the rear wheels both free of each other or they are joined). Plz comment if you knwo any thing. I am in real help. Moreover i was going to buy a motor driver sheild from here : http://www.snapdeal.com/product/robomart-l293d-motor-plate-arduino/1675508201#bcrumbSearch:l293d  Is it compatible with arduino uno? Is it the same that is on adafruit.com. 

Question by 1101Snehil 4 years ago  |  last reply 4 years ago


telescope camera for homemade super low light camera

I want a camera that can shoot in extremely low light without long exposure times. it can be in black and white it would be nice if it did this with a very large lens so they make sensors for telescopes that are very sensitive, take very nice photos, are designedd to be hooked up to a computer and have whatever lens u stick in front of it work. i think we could use an arduino* a really big lens, and a telescope camera to build our own digital cameras with whatever outr special needs may be.

Topic by nicko0 6 years ago  |  last reply 6 years ago


that piece is this?

Eu quero  construir um  Arduino  e preciso de um  regulador de tensão  entre as peças  que eu tenho esse  é o mais  semelhante ao  que  encontramos  na internet

Question by ualbuquerque 4 years ago  |  last reply 4 years ago


(newsletter) Homemade Shampoo, Cryptex, RumbleMouse...

Sign-up for this newsletter: Welcome back! NEW Pocket-Sized Contest - Think small, and win a custom laser-etched Leatherman! Get in the Garden Contest - Enter any Instructable with a gardening theme and win an awesome computer-controlled indoor composting machine from NatureMill! Art of Sound Contest - Share any sound or music-related Instructable, and win an incredible custom hi-fi tower set with subwoofer, monster speakers, and more!! Get the LED Out! Contest - Closed for entries, but open for voting! Vote Now! RGBike POV - Open Project Make Your Own Seed Tapes Homemade Shampoo Double Helix DNA Model with LEDs Simple Sequencer Make an Onigiri (Rice Ball) Adjustable Modular Furniture Non-Slip iPod/phone Stand New contest! Get Started with Arduino Build an Alien Artifact DIY Audio Switch How to Cook with Herbs and Spices Win a cool computer-controlled indoor composter! Win these custom hi-fi speakers! Cryptex Design Audio for an iPhone Game Replace Low Voltage Halogens with LEDs RumbleMouse Sign-up for this newsletter:

Topic by fungus amungus 9 years ago


how to configure lcd nokia 3310 to an ATmega8 with bascom avr?

 

Question by Rendydevara 9 years ago  |  last reply 9 years ago


Where to get a cheap extruder? Answered

Where is the cheapest place to get an extruder for a 3D printer?  It must be premade (preferably a DC motor, not a stepper), and cannot require that I buy separate 3D printed parts.  Unfortunately, I cannot use Ebay, however, I can use most other online retailers.  It must be below $50, and if thats not possible, is there any way to make one with commonly avaliable parts (no 3D printed ones or milled parts), also cheap?  It does have to be fairly small, but need not use the premade spools of plastic, if an epoxy or solething else exists that would also work. (and I have already seen the glue gun extruder instructable here, that is far too big and heavy)  I know that most of this is a long shot, but I'm hoping someone knows/has heard of one of these.

Question by jduffy54 6 years ago  |  last reply 6 years ago


Can I use 741 op amps instead of 1 LM324 in a heart rate sensor?

Http://makezine.com/video/visualize-your-heartbeat-with-this-homemade-pulse-sensor/

Question by DangerousTim 4 years ago  |  last reply 4 years ago


How can I make my homemade 3x3 matrix show numbers like 2, 3, and 5 like the are shown on a dice?

I made a 3x3 matrix with my arduino, with transistors on the collums and the rows hooked up with wire, going to the output. I have a arduino, with 6 PWN outputs, luckily, and 14 total digital pins, and also 6 analog pins. So I need help having a 2 show up on my display, because it looks like a 4. and this is shown like it is on a standard dice. Soo... what am I doing wrong? I am just turning the collums and rows on and off to show lights and stuff. So ... help!

Question by chrisapalo 9 years ago  |  last reply 9 years ago


controlling coil using H-bridge...possible? Answered

Hi! Yesterday I bought a Nikko X-pander r/c car, for only $ 3, and I want to put my own electronics on it. I've seen that the front wheels are controlled by some sort of electromagnet that changes polarity to turn the wheels left or right. I already made my own homemade L298 module and I want to know if it's possible to use one channel of L298 driver to change the angle of the front wheels. Thanks.

Question by Timofte Andrei 5 years ago  |  last reply 5 years ago


Why won't my homemade phone charger work? Answered

I'm trying to make two projects. First I'm trying to charge my phone with 4 AA battery's connected in series. Second I have a solar panel I want to use to charge each of those AA's individually. Heres my plan as it stands. I hook up my solar panel to one rechargeable battery with a diode in-between so when its cloudy the battery doesn't put its juice into the solar panel. After I finish charging each battery I wire all four up in series and connect that directly with a charging chord for my phone. I defiantly do not understand this concept so help me were I go wrong. However I've run into some problems. When I cut the cord to my phone charger I found a string of wires under neath the first layer. after cutting deeper I found a red,black,green, and white wire. Assumeing the others didn't matter I attached the red and black wires to the positive and negative ends of my 5 volt emitting AA battery set up. My phone didn't register it was charging. After reconnecting all the wires to their original usb, and plugging that into the outlet the charger worked again. So my first question is why can't I just put voltage to the red and black wires and how do I make this work with my homemade battery pack. Secondly After hearing some awnsers I've become concerned that this AA set up will damage my phone if I don't have a device that cuts off the voltage when my phone is charged or when my batterys drain to low. How do I fix this easily and without having to buy special components. I have a beginners arduino set so I can spare any of the components in that. I,m sure I'll have more questions as I go along but this is it for now. Thanks so much for your input I need the help.

Question by inconceivable1 2 years ago  |  last reply 2 years ago


ATTiny85 programming error

Hi everyone, I'm having a bit of trouble with programming an ATTiny85 using an Arduino Uno.  I've previously been able to program them quite easily using the method shown here; http://highlowtech.org/?p=1695   I've tried using both a homemade programming shield and wiring a breadboard, but I get the same error each time; avrdude: Yikes!  Invalid device signature.          Double check connections and try again, or use -F to override          this check. I don't know what this means or how to fix it.  I know my wiring is good, the breadboard is at least quadruple checked and I have used the shield many many times before.  Any suggestions or ideas? ~Dudes

Topic by dudes 3 years ago  |  last reply 1 year ago


Woodpunk Lamp, 3D Stereoscope Camera, Optimus Prime Costume

Woodpunk Lamp 3D Stereoscope Camera Optimus Prime Costume Delicious Fruit Tart Pokemon Snuggie Costume RC Quadrotor Dark Knight Joker Makeup Make Hard Cider DIY Suspension Bridge Arduino RGB LED Tutorial Halloween Robotic Top Hat Homemade Tofu Simple Animatronic Hand Gorilla Tape Gorilla Mask Green Lantern Prop

Topic by randofo 8 years ago


(newsletter) EyeWriter, Remote-Control Lawnmower, Roof Coffee Cup

Sign-up for this newsletter: Welcome back! New: Homemade Holidays Contest - Make some holiday magic! Share your holiday projects and win an electronics-controlling Kymera magic wand or some custom 3D-printed sculptures from Shapeways! As the nights get longer, stay visible for the Light Up the Night! Contest. Win some cool clothes from Cordarounds with secret reflective powers! Help choose Arduino Contest finalists. Vote now! Starting this weekend: Homemade Holidays Food Contest - Share your tasty recipes! Want a more convenient version of Instructables with fewer ads? Get a Pro Membership! $6 Macro Tilt Lens Eggnog Recipe Remote-Control Lawnmower Illustrated Turducken Recipe Put the magic back in your holidays! The EyeWriter Waffled Pizza Pockets Arduino RFID Door Lock Walking Stick Storage Compartment Plastic Bottle-Legged Bed Arduino Laser Tag Use 35mm Film in a Box Camera Ethernet RJ-45 UTP Cable Tester Build Your Own 8/16-bit Sculptures! Buffalo Wings Recipe Gene Simmons Destroyer Costume Roof Coffee Cup Instructables.com - 82 2nd St. - San Francisco, CA Sign-up for this newsletter:

Topic by fungus amungus 9 years ago


3D Spherical Display, Tailgate Hot Tub, Turkey Recipe

3D Spherical Display Tailgate Hot Tub Ultimate Turkey Recipe Modular Pie Cosahedron 4-Minute Chocolate Mousse How to Microwave Corn Award-Winning Pumpkin Pie Homemade Pie Crust Easy Knit Hat Pattern Make Infused Oil Classic Gravy Recipe Blinking Bicyclist Armband Turn a Belt Into a Pen Mysterious Ring Magic Trick Installing Chair Rail Make a Backyard Path Arduino Music Responsive Light Instructables.com - 82 2nd St. - San Francisco, CA

Topic by randofo 8 years ago


(newsletter) Snow Globes, Skeeball, Improvised Gas Mask...

Dec 18, 2008 Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup1","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); } Welcome back! Get your tools ready for the biggest building competition of the year!The Craftsman Workshop of the Future Contest is open to any project that uses tools. Share your amazing ideas, and win $25,000 in Sears gift cards! Craftsman wants to see your workspace in the Workshop of the Future Contest: Show Your Space contest! Simply post pictures of your current space, or the space you wish you hand, and you're entered to win a weekly Craftsman tool prize! See who won this week! Help choose who wins the SANYO eneloop Battery Powered Contest by voting now! Homemade Holidays are here again! Sending some sweet custom gifts to friends and loved ones? Enter them in the Homemade Holidays: Holiday Gifts Contest and win some cool prizes! Decking the halls with some crafty creations? Enter them in the Homemade Holidays: Holiday Decorations Contest and win an awesome Dremel kit! See who won a prize in the Homemade Holidays: Holiday Card Contest! We've worked out a special deal for the Instructables community to get the Magnetic Sculpture Kit from the Maker Shed for 20% off until Dec. 19. After ordering, use this coupon code to get the discount: MAGNETIC Expandable Christmas Stocking by scoochmaroo Cardboard Cantilever Chair by wholman Imitation Alka Seltzer for Cheap by belsey 900,000 volt Van de Graaff Generator by nickademuss Any project that uses tools is eligible! All the best Christmas Instructables in one place! Garduino: Gardening + Arduino by liseman Make a cheap ice-skating rink by instructors GPS cup holder mount by botronics Hidden Christmas Tree Watering System by rickyspears Make a King Koopa Suit by Fylke Build a Heavy Duty Six-legged Robot! by rpantaleo Glass Whiteboard by johnpombrio Make Skeeball with Pizza Boxes and a PC by amonmillner Homemade Holidays Contests Share your gift ideas and win a Dremel kit Show off your crafty creations and win a Dremel kit! Bright Bike by theredproject Great Inexpensive Computer Desk by nickfarnell Light Bulb Snow Globes by itschrys Improvised Gas Mask by TimAnderson Now go make something awesome, and I'll see you next week! - Eric Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup2","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); }

Topic by fungus amungus 10 years ago


(newsletter) Fried Ice Cream, Treehouse, Werewolf Costume...

Sign-up for this newsletter: October 1, 2009 Welcome back! NEW: Arduino Contest - Make anything involving Arduino and win a sweet prize from Evil Mad Science or an Arduino Mega! Digital Days Photo Contest - Show us your best photo trick, tip, or homemade gadget to win a new Sony digital camera! Winners announced: See who won the Forbes Teach Me Fast Contest and the SINGER Kids Crafts Contest! Coming soon: Our most awesome Halloween Contest ever! Any Instructable published since the last Halloween contest is eligible! Want a more convenient version of Instructables with fewer ads? Get a Pro Membership! Laser Powered High- Speed Photography A Word Clock Fried Ice Cream Build a Treehouse Win sweet prizes from Evil Mad Science! Win a digital camera! Build a Polished Concrete Desk Star Trek 2009 Uhura Costume Make a Sewing Pattern with Tape Realistic Werewolf Costume "Garage Door Open" Indicator Make a 9 Doll from the Movie Make Plastic Bones Look Gross and Old $0 Camera Level See the winning videos! Winners announced! Projector Slide Window Hanging Zombie Burgers! Pumpkinseed Kayak - Easy and Light How to Sound a Shofar Now go make something awesome, and I'll see you next week! - Eric Instructables.com - 82 2nd St. - San Francisco, CA Sign-up for this newsletter:

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


(newsletter) Build a Lightsaber, Fiber Optic Ceiling, Steampunk Laptop

Sign-up for this newsletter: Welcome back! Arduino Contest - Make anything involving Arduino and win a sweet prize from Evil Mad Science or an Arduino Mega! Closes Sunday: Digital Days Photo Contest - Show us your best photo trick, tip, or homemade gadget to win a new Sony digital camera! Winners announced: See who won the Converse Back to School in Style Contest! Coming soon: Our most awesome Halloween Contest ever! Any Instructable published since the last Halloween contest is eligible! Want a more convenient version of Instructables with fewer ads? Get a Pro Membership! Create a Fiber Optic Starfield Ceiling Bedazzler: DIY Non- Lethal Weaponry Make a Werewolf Mask Mummy Dogs Get your outfit ready!   Closes this Sunday! Steampunk Veneer Laptop Mod Non-PV Solar Power Low Cost Halloween Pop-Up Character Build a Sweet Raised Clubhouse Build a Lightsaber Quick Roast Chicken The Office Worker's Portable Solar Oven Install a Ball Valve on a Cooler See who won!   Win sweet prizes from Evil Mad Science! Make an Indoor/ Outdoor Boomerang Hand-Solder a PowerPad IC Cheap and Quick iPhone Stand Make Your Own Lathe from Trash   Now go make something awesome, and I'll see you next week! - Eric Instructables.com - 82 2nd St. - San Francisco, CA Sign-up for this newsletter:

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


(newsletter) Automatic Cat Feeder, Silk Spectre Costume, Funnel Cake...

Sign-up for this newsletter: Welcome back! Mega Contest: It's our most awesome Halloween Contest ever! Any Instructable published since the last Halloween contest is eligible! Win great prizes from Singer, Dremel, Ponoko, Monkeylectric, Photojojo, and an Instructables Pro Membership! Arduino Contest - Make anything involving Arduino and win an Arduino Mega or a sweet prize from Evil Mad Science! Vote Now: Digital Days Photo Contest - Vote for your favorites! Want a more convenient version of Instructables with fewer ads? Get a Pro Membership! Cat Powered Auto Feeder Tasty Homemade Funnel Cake Loop Back Lacing Easy iPhone Alarm Clock Stand Dozens of great prizes in six categories!  Win sweet prizes from Evil Mad Science! Build a Wireless Camera Controller Silk Spectre Costume Analog Electricity Usage Meter Bunch of Grapes Dog Costume   Single HD Gyro Image Stabilizer Create a Realistic Burn with Makeup Pet-Resistant Chick Brooder Cheap and Easy Steampunk Keyboard Little costumes for the big day!  Turn your home into a House of Terror! Electronic Door Opener How to do a Flip Turn Create Real Working iPod Costumes Portable, Paperless, Digital Copier   Now go make something awesome, and I'll see you next week! - Eric Instructables.com - 82 2nd St. - San Francisco, CA Sign-up for this newsletter:

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


Want to find capacitive touch input for project

Hi there, I am working on a personal project and would like to find a capacitive touch input device which is roughly 5x30cm in size and will give me a x,y value for one or two fingers. The resolution does not need to be brilliant - 7 bit range in the x direction and maybe 5 bit in the y direction would be fine. Serial interface which I can use with my Arduino. I would also like to get a "pressure" for each - I know this is asking a lot but the "pressure" can roughly be guessed at not by actual pressure but by perhaps an increased/decreased capacitance or the amount of the surface being covered. I only need this to determine which of the two finger inputs is pressing hardest so again it doesn't need to be precise. Would anybody know of such a device? I mean - there must be companies producing these, I'd not want to go and have a custom one made for price considerations but surely there is something vaguely close. I have looked into the possibility of making one for myself but it appears I would struggle to do something this complex with my Arduino alone and the only IC which will do this with a homemade panel (not that I have the ability to create a capacitive panel with this many pads) seems to be QProx QT1081 which only accepts 8 inputs. Any pointers or ideas would be very gratefully received :) Cheers, Adam

Topic by Adam_D 8 years ago  |  last reply 8 years ago


Bringing old LCD screens back to life

When it comes to school projects, I always use my electrical knowledge to engineer some sort of out-of-the-box project. Being a freshman in highschool, most people are sort of amazed by my works. It's all basic stuff, really. I've been doing a lot of work with :EDs inside of these homemade posterboard boxes I've been making. After making one for each class, they're getting really old and they aren't too great looking. So I'd like to really give people a show. About two months ago, I got a 12 inch LCD screen from an old Compaq laptop. For reference, the screen (on the back casing) reads, "LCD MODULE AL LM-JK53-22NTR 10D40092527904". I cannot find many references to a pin-layout or a datasheet, but that's not too much of a problem. If it comes down to it, I will test each pin until I can get some progress. I am interested in using the screen to display data. I don't mind if colors aren't present other then black and white. Black and white works for my purposes. Is it possible to use this with an Arduino? With my initial research, I found that using a VGA card with a VESA Feature Connector will enable me to get the job done. I then run into two problems: 1) I cannot find one of these connectors, and 2) I am unsure if I could even make this work with an Arduino Uno. Any help is appreciated. If the project isn't possible, it's not the end of the world for me. By senior year, I probably will have built a full computer anyway :P ~Joe B.

Topic by freethetech 7 years ago  |  last reply 7 years ago


(newsletter) Bamboo Bike, Pacman Furniture, Beef Jerky...

Sign-up for this newsletter: September 24, 2009 Welcome back! Digital Days Photo Contest - Show us your best photo trick, tip, or homemade gadget to win a new Sony digital camera! VOTE NOW: Converse Back to School in Style Contest - Vote for your favorites! Coming soon: Arduino Contest and our most awesome Halloween Contest ever! Any Instructable published since the last Halloween contest is eligible! Want a more convenient version of Instructables with fewer ads? Get a Pro Membership! Print on Fabric with Citra-Solv Build a Greenhouse with Scrap Materials Make a Great Book Safe Bamboo Bike Frame Cup & Pot from Aluminum Bottles Brownie Recipe Bike Tire and Gear Belt Steampunk Mechanical Monocle Pickled Eggs Solar iPhone Charger for <$50 Beef Jerky Carry any Bottle with a Jug Knot Handle Vote for your favorites! Win a digital camera! Wooden Engagement Ring Mini Joystick with Fire Button Smell Graffiti Pacman Cushion Now go make something awesome, and I'll see you next week! - Eric Instructables.com - 82 2nd St. - San Francisco, CA Sign-up for this newsletter:

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


(newsletter) Touch Screen Glove, Break Board with Your Hands, In-wall USB Charger

  Art | Craft | Food | Games | Green | Home | Kids | Life | Music | Offbeat | Outdoors | Pets | Photo | Ride | Science | Tech Merry Contest-mas! We're celebrating the holiday season with a slew of great contests! New: show off your best drink in the Cocktails vs. Mocktails Contest, and win sweet prizes from Think Geek! Continuing: Enter your food, presents, or decorations in the Homemade Holidays and Holiday Food contests, and win a Kymera magic wand, Shapeways gift certificates, a food processor, fruit-pickers, and Instructables Pro memberships! And coming soon: a Gingerbread House Slideshow Contest! In-wall USB Charger Wood Pendant Necklace Candied Buddha's Hand Citron Gaming Coffee Table Make a Glove Work With a Touch Screen Electric Scooter Pushed by a Monkey Chocolate Pie Board Breaking Make Your Own Springs in Seconds Bookcase Door Bathroom Status Indicator Lights Duct Tape Hoodie Message in a Bottle Key Ring Wooden Induction Charger Secret Knock Detecting Door Lock Industrial Style Media Shelves Guides Gift Wrapping Ideas Solar Panels for Your Home Halloween Contest Winners Arduino Contest Winners Instructables.com - 82 2nd St. - San Francisco, CA

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


Project Collaboration?

I'm REALLY bored at work at the moment and need a personal project to distract me. The problem with past projects is I often run into problems or lose interest and they fall by the wayside. I was thinking that if the project was a collaboration I'd be more motivated and could call on people with better skills than me. Anyways I'll propose a few projects, and let me know if you are interested. Or if you've got an idea, post it up. I'd love to do something robotics related, but m programming skills aren't great. I can use "wrapper" environments, like Matlab and Arduino, but raw C++ isn't a strong point. I've got access to all the CAD stuff that would ever be needed, Pro/E, Solidworks, AutoCAD, ANSYS, Strand7. I've got some skills in and access to composite manufacturing, like carbon fibre and glass but no vacuum baggin facilities anymore. My first project idea is a bargraph type watch - kind of like the awesome binary watches here, but the time increments on a bargraph. I think only one bargraph to show the minutes would be necessary - you pretty much know the hour most of the time, and you could work it out using the minutes if it's around the hour. A ten segment display would give resolution of 6 minutes - good enough for most purposes. I could do the hardware layout and manufacturing for this project, but I don't think I could do the programming. how about a homemade SMS device? not the most practical when mobile phones are so small and cheap and would be WAY more fully featured, but I think it would be cool to have a homemade device that could at least send SMSs. Open source, single sided PCB, would be awesome. obviosuly as small as possible but maybe aim for something the size of a blackberry of treo? Not stylish maybe but maximum hacker cred thumb keyboard ---> microcontroller ---> cellular module&LCD GPS based car locator - I know this functionality exists in modern cars but certainly not my 1994 feroza - a box that sits in your car that SMSs you GPS coordinates if your car alarm is activated. I've been looking for this for ages in a commercial product but the prices are outrageous. Other more outlandish projects are a CNC machine and single sided, through-hole, no (or very little) programming MP3 player Any ideas?

Topic by trialex 12 years ago  |  last reply 12 years ago


(newsletter) Kilo-Lumen Bike Light, Sparkleball, Amazing Pumpkin Pie...

Nov 26, 2008 Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup1","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); } Welcome back! Making something sweet for the holidays? Then enter it in the Holiday Treats Contest and win a custom laser-etched rolling pin! Show us your best creation powered by AA, AAA, C, or D batteries and win a full set of eneloop rechargeable batteries in the SANYO eneloop Battery Powered Contest! Color a robot and send it in to help us decorate Eric's office!Coming very soon... our biggest contest yet! Any project using tools will be eligible, so start tinkering now! (no-melt) Sparkleball by sparkleball_lady Perfect Oven Sweet Potato Fries by jessyratfink Cook a Huge Dinner w/ Spreadsheets by canida Kilo-Lumen bike headlight by kc6qhp Win a sweet set of rechargeable batteries! Win a custom laser-engravedrolling pin! Homemade Flavored Marshmallows by cainunable Build a Greenhouse for under $25 by PondPlantGirl Turn a Photo into a Stencil! by Weissensteinburg Amazingly Smooth Pumpkin Pie by ewilhelm "Dead" Battery Lamp by zjharva Arduino Controlled Servo Robot by Stuart.Mcfarlan Modular Pie-cosahedron by turkey tek Bicycle Oil Lantern by alpacalypse Make a gift special with these customizable Instructables Vote for your favorites! How to make Soft Drinks by SFHandyman Bench Saw Table for a Wood Lathe by Phil B Cranberry Relish by LasVegas Hard Drive Persistence of Vision by vishnubob Now go make something awesome, and I'll see you next week! - Eric Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup2","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); }

Topic by fungus amungus 10 years ago


Gift exchange (Prodigity)

(I'm having difficulty posting this in the gift exchange, sorry if I miss-posted) Hi everyone, I'm looking forward to all the great gifts and 'ibles people are going to make =D I'm willing to make anything circuit board related, preferably digital i.e. analog. Though to see if I'm not getting over my head here I would like to hear what you would like to get if I were to make your gift. Thanks :) My skills include: Medium level of electrical engineering Here's a link to my featured Instructable: https://www.instructables.com/id/USB-NES-controller-with-an-arduino/ What I'd like to make for someone: ANYTHING circuit board related I'd be willing to make this size gift package for someone: Small, medium and large I'd be willing to receive a smaller or larger size gift package from someone than the one I make for someone else: Yes What I like: - Eco-friendly stuff (solar, wind, recycling, independent from net etc.) - Electric guitar stuff (e.g. Tape echo with cassette recorder, pedal, portable amp etc.) - Musical instrument (ranging from carrot ocarina to synth, pretty much all) - Lockpicks - Tools to help with soldering (Clamp, fume extractor, homemade liquid flux etc.) - Rain - Light (Lamp, wake-up light, visual feedback for email etc.) What I don't like: - Anything fragile (I like big, chunky and/or sturdy) - Fluorescent lamps I absolutely can't have: Fluorescent lamps Type of thing I'd love to receive: Anything from the 'What I like' list would be cool. Would you be willing to ship to an address outside your own country? Sure Confirm that are at least 18 years old or, if not, that you have the approval of a parent or guardian: Confirmed Let the DIY commence!

Topic by Prodigity 8 years ago


Automatic Irrigation using d1 mini

Hi Everyone, I reviewed different automatic irrigation system projects here in instructables and other sites as well and i decided to gather parts to do a simple small project myself. One thing that comes hard is the programming part as I don't know any programming language. I'm looking for some help with code merging, explanation and some general guidance. Could you please let me know, point me to right direction and tell me what you think and if requirements are actually achievable? What I would like to achieve: Intention of this project is to have manual and auto irrigation system which will: 1. Measure soil moisture and dependently on the value activate the usb pump which will water the plant (preferably analog output that will show the measurements in %) 2. Manual activating the pump via hardware button and via mobile phone with internet connection 3. Distance sensor which should measure how much water is left in the tank 4. Email notification with info when to water the plants and soil sensor data regardless of the automatic process that has already started 5. Email notification with info about the water in the tank when it’s near empty 6. Dashboard preferably inside the network (not using third party like blynk or others) with access from the internet (I have QNAP that I think can be used). 7. If possible – have amazon echo (Alexa) read the sensor data to tell me the values and comment if the plant should or shouldn’t be watered or the tank should be refiled or not as well as ability to ask Alexa to start or stop the irrigation Hardware: D1 mini: https://wiki.wemos.cc/products:d1:d1_mini Wemos V2 Relay shield: http://hobbycomponents.com/shields/865-wemos-v2-relay-shield My relay is slightly modified: 2 small wires soldered to the vcc and ground so that when it receives the signal on d1 pin it opens and current flows to female usb connector supposedly activating the usb water pump. All this can be stacked together even with soldered wires YL-69 sensor: http://www.oddwires.com/yl-69-soil-hygrometer-humidity-soil-moisture-detection-sensor/ Ultrasonic Distance Sensor (HC-SR04): https://thepihut.com/products/ultrasonic-distance-sensor-hcsr04 USB mini water pump: www.goo.gl/yUABDd Button x4 if needed: Board x4 if needed: sample codes used in other projects: https://randomnerdtutorials.com/guide-for-soil-moisture-sensor-yl-69-or-hl-69-with-the-arduino/ https://create.arduino.cc/projecthub/nekhbet/using-the-yl-39-yl-69-soil-humidity-sensor-with-arduino-968268 https://community.blynk.cc/t/irrigation-relay-with-timer-esp8266-wip/700 Alexa enabled homemade cat feeder example: https://www.hackster.io/darian-johnson/alexa-powered-automated-cat-feeder-9416d4 Thank you very much in advance for your help and support.

Topic by wube 1 year ago  |  last reply 1 year ago


(newsletter) 5-Minute Cake, Run Through World of Warcraft, Fake Scars...

Oct 23, 2008 Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup1","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); } Welcome back! Our book, The Best of Instructables, Volume 1, is now on sale! We selected over 120 of the best Instructables and put it into an awesome book. Check it out and buy a copy today! Enter the Party Like It's 1929! Contest! With the economy in the toilet we need to find clever ways to save money, live with less, and reuse what we've got. Remember the Great Depression? We can definitely do better this time around. Share your cash-stretching tips and tricks, and win something useful! The DIY Halloween Contest is scaring up awesome projects! We've partnered with some of your favorite websites to bring you the biggest and best Halloween contest ever -- and we've got tons of great prizes to give away. Show us your best costumes, treats, gadgets, jack-o-lanterns, and more! Check out the entries and get inspired for the best Maker holiday ever. The Hungry Scientist Contest and this round of Burning Questions close this weekend. Enter now to win a Kitchen Aid mixer, a super nice knife set, or a Le Creuset Enamel Cast Iron Cook Set for your food hack or a t-shirt for your Burning Answer!Stop by our office tonight for our Halloween open build night and make something awesome! The Best of Instructables - Video by ewilhelm Run Through the World of WarCraft by ManaEnergyPotion 5-minute Chocolate Cake by scoochmaroo Easy to do VERY convincing scar! by BlackDidThis Tons and tons of spooky andamazing prizes!Closes this weekend! Leather iPod Touch Case using Water! by gmjhowe Clear a clogged drain with SCIENCE! by fultron89 Eat a Sprouted Coconut by TimAnderson Little Zen Garden by itschrys Cookie Periodic Table by maicoh Reclaimed Wood Table by drocko Is Your Printer Spying on You? by EFForg Journal to Save Your Life by johnnyallenshaw 10 ways to gross out your guests Share your best money-saving tips! Make a Laptop Stand with a Coat Hanger by tullytully Make a Shirred Fabric Summer Dress by threadbanger Homemade Spaghetti by gregr Sewable Arduino Interface by Plusea Now go make something awesome, and I'll see you next week! - Eric Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; } window.open("/newsletter/newslettersignup?email=" + src.value,"newslettersignup2","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); }

Topic by fungus amungus 10 years ago  |  last reply 10 years ago


DIY Vanilla Extract, $50 Laser Cutter, Bullet Time...

Sign-up for our newsletter here. Jan. 3, 2008 Happy new year! We're kicking off our new year with the Lion Brand Yarn Slideshow Challenge. Enter photos of your yarn-based creations to win Lion Brand yarn, patches, and stickers! Don't forget to enter the Homemade Holidays Contest! There's a little over a week left to win great prizes from CRAFT magazine! The Laser Cutter Contest has just closed. Stay tuned to find out who the finalists are. Check out these cool instructables! Make DIY Vanilla Extract Quality vanilla is a tasty and essential cooking ingredient. By making our own extraction we get the highest quality product from the best beans. posted by ian on Jan 1, 2008 Hack mac laptop to be a mac tablet in 15 minutes Combine an old mac laptop and a Wacom tablet to get your own mac tablet. It may not be pretty, but it works and is easy to put together.posted by c4l3b on Jan 2, 2008 Laser cutter for under 50 dollars With a couple of broken scanners and $30 of materials you can be cutting stencils with your own laser cutter. posted by lamedust on Jan 1, 2008 How to Enter the Ghetto Matrix (DIY Bullet Time) A tutorial on how to build your own cheap, portable and hood-style bullet time camera rig on the cheap and the fly. posted by fi5e on Dec 31, 2007 Dollar Store Parabolic Mic This is a ridiculously easy way to build a very functional parabolic microphone using mostly items purchased from a dollar store. posted by jurtle on Jan 2, 2008 Show off your project and win Lion Brand yarn!Win great prizes from CRAFT magazine! Solid Wood Digital Clock How to build a wooden digital clock powered by an atmega168 (arduino) with a built-in alarm and games.posted by J_Hodgie on Dec 28, 2007 Build your own t-shirt printing press Have a great idea for a t-shirt? Here's how to make a press for making shirts similar to rubber stamping. posted by zieak on Jan 2, 2008 Time Lapse Intervalometer for SLRsCreate your own magical time lapse effect with a DIY timer.posted by eagleapex on Dec 30, 2007 Add INTERNAL Bluetooth Capability To Your iPod With a steady hand and some soldering skills you can be listening to music off your iPod without any dongles or wires. posted by fstedie on Dec 31, 2007 Autonomous, Wirelessly Controlled Hovercraft How to design and create a wirelessly controlled modular hovercraft, that can be controlled with an RC controller, or made completely autonomous. posted by bradpowers on Dec 31, 2007   Now go make something awesome, and I'll see you next week! - Eric

Topic by fungus amungus 11 years ago


PSU design (major revisions): Transformer calculations help?

Recently I have attempting to design a proper dual-rail power supply that will allow me to set a voltage as low as +-1V up to +-30V in 0.1V increments at (hopefully) 3 significant digits (at least for the lower voltage settings). Anyway, this supply is also going to be current limited to up to 5A,again, it can be set to just about anything. I plan on using an Arduino micro-controller to set the output. In order to do this, I plan on using the analogWrite functions, or better yet, a legit DAC. There will be 4 outputs from the Arduino that will set the power supply output by applying a 0-5V voltage on the input of the 2 current limits and 2 voltage sets. (one for the negative rail, one for the positive). However, I have kept running into the same problem: how do I plan on driving this linear power supply with up to 200W*? My first idea was to use a a MOT, due to their high-power capabilities, and re wind the secondary with the right number of turns to achieve this output. However, I have heard that these transformers are not optimal for continuous running due to their poor and cheap design. (losses are very high). My second idea was to search around for a 250VA transformer. However, even until now, the VA rating confuses me. How does VA compare to W? I know this has something to due with reactive power, real power, and apparent power. However, I have no intuition of any of these 'powers.' How would I go about calculating the correct size transformer for the job, also, I am going to assume this linear power supply has the properties of a resistive load, since it is rectified and smoothed with a filter capacitor, so practically nothing should react with the AC power. (unless there is something more to the full-bridge rectifier setup I am considering.) This is when I came across unwound toroidal cores found on eBay for $25, the perfect price range! However, this has raised more questions! to start off, beyond turns ratio, I do not know now many turns I need for the AC side of things. I know intuitively and from experience, mains-frequency transformers do not work with only one (or even few) winding(s). I think this has to do with saturation, but I'm no expert by any means. and the inductive reactance of the transformer's primary. How do I calculate losses, inductance, and other important parameters of a homemade transformer like this? Things get very nasty when I look back at rewinding an old transformer. Now I have all these questions about inductive reactance, power, currents, magnetic flux and saturation, but also, about determining the original power rating of something like a very old small welding transformer or one from a large 10A car-battery charger. Is it possible to approximate the power by measuring the dimensions of the core? How close will this approximation be?  After getting frustrated with this, I considered alternative approaches. What if I purchased 2 ~20V ~6A SMPS (switch mode power supplies) connected them in series, and connect the center tap of my linear supply to the joining point between the 2 SWPS's? Would this be unstable and be bad for the SMPS if a load was connected between the 'outputs' of this new center tapped supply? Would any sort of balancing be required? Also, a bigger problem includes how this will be connected to my linear PSU design. With a low voltage @ high currents, I would be wasting a LOT of power, power that has to be dissipated away from the transistors. This heat can approach 200W, which is company unreasonable! Anyway, I would them have to either a switching preregulator, or modify the SMPS's so the voltage can be controlled easily and varied between, say, 3V to 20V. absolute accuracy is not required, close enough, and rest of my PSU should handle it. This becomes seemingly impractical too, and many other considerations need to be made. What should I do? what are the calculations and factors I need to know? i do not have an LCR meter to measure inductance, so trial and error is out. Does anyone here have experience at this? Help would be greatly appreciated! *The 200W figure was calculated by taking 40V, (What I believe would be a safe to allow some slack for +-5V voltage drop across my 2 shunts and transistors) and multiplying it to 5A of current for the maximum power output. ------------------------------------------------------------------------------------------------------------------- I have added an image of my current design, and I have modularized it the best I could. The YELLOW is all my current power-management circuitry. Currently just a transformer with many taps, going to a currently-undesigned switch box that will change the voltage on the output, which is then rectified and enters a filtering capacitor, finally entering the circuit.  The GREEN field is the voltage set. It is the most major part of the PID feedback loop, along with the ORANGE field. It works simply by feeding a voltage to the positive of a op amp configured as a comparator, and with negative feedback from the output. It then outputs a signal to the transistor, turning it either more ON, or more OFF depending on how the output voltage compares to the +Vset. The negative portion is largely the same, but the input voltage needs to be inverted so the output voltage is set negative properly. I was not able to use less than 2 op amps for this portion, unfortunately. The ORANGE field is current set. It works by measuring the voltage drop across the shunt resistor, and outputting a unity voltage that is referenced to ground, instead of to the positive rail. (It took me forever to finalize and perfect that!!!) Anyway, this voltage is then fed into a op-amp configured as a comparator to drive the transistor. The BLUE field is my switching regulation topology, which is controlled by both the ORANGE and GREEN fields. Do you like my use of diodes as a super-simple voltage or current selection switch? the op amp that outputs a lower voltage is the one that gets 'listened to' by the transistors. This way, current and voltage mode enable properly. This does add a small problem when it comes to powering the op amps, all of them have to be powered off of slightly higher voltages to swing the full range due to the voltage drops of those diodes. In the PINK field is simply a single-transistor solution to a constant current load. This allows the regulator to be regulated even at very low voltage set levels. This is why I am able to achieve a +-0.5V on the output (at least within LTspice) Finally, and most unimportantly, the light PURPLE fields have a simple ultra high-gain difference amplifiers that will detect if the output current and current set are the same, and turn On or OFF the respective LEDs. The green LEDs are voltage-mode indicators, and the red LEDs are to show when current-limiting mode comes on.

Question by -max- 5 years ago  |  last reply 5 years ago


Making a better spot welder....

I am in the process of building a proper spot welder from scratch. Proper more in terms of the electrical and electronics part but not so much in looks ;) My problem now is to find useful info on what power levels are required for certain tasks. I realise that welding thin sheet metal won't need as much time and amps as welding a 3mm stainless steel rod - but what is a "good" power level? I watched a bunch of Youtube videos showing various approaches but for many it seems the producer had no clue about the difference between creating a short with burn marks and a weld... Especially when it comes to creating battery packs with a capacitor bank as the main power provider you can clearly see the device burns holes but does not really create a welded spot. On the other hand there are a few videos showing spot welder made from a MOT that seem to produce a proper melted and welded connection. When I used a proper spot welder at work it had timing settings, power levels and even a feature to adjust how the current rises.... Not to mention a gauge that checks the pressure and only activates the welder once the set point is reached... There is a ton of info out there that after a thausand words still tells you nothing you need to know :( So is there anyone here who can shed some light on the actual process of spot welding in easy words for everyone to follow? I am aiming for a max output of around 400A @ 1.5 -2.5V with an adjustable shunt in the transformer core to avoid oversaturating the core. In a later stage I will add power control over the primary side but until then it is only time control, from a few ms to a max of 5sec if the damn controller arrives one day. Big questions: 1. Is a power control really required or is it possible to cater from thin to thick just by using different timing settings? 2. Since a MOT is used for the power supply: Is it better to leave the shunts out to fully avoid saturation by adding an inductor in line with the primary or is it still better to adjust the shunts under load to get the maximum power possible? 3. Aluminium and other materials benefit from using AC but would be good to have a DC output too, if so then what materials really need DC? 4. All I could find is that copper is used for the electrodes, due to resistance and heat transfer - are there other options apart from using copper? 5. Tricky one: I would prefer to use the secondary winding as the new primary to avoid core saturation and to lower the load on the power outlet. Where can I find very thin copper bar material that I can coil up and insulate as I would quite a few more turns to get at least 1.5V out of it? Just don't like the idea of spending days rolling a copper bar thin enough.... For the advanced model at a much later stage: Of course I would like to be able to use a proper power control instead of a motor dimmer or similar. For obvious reasons an inverter microwave jumps to mind. But after checking one I noticed one big problem: there are not really that many windings on the primary of the transformer at all! Same way our modern switchmode power supplies only use a few turns these things do exactly the same. After some quick and dirty initial tests I realised that even a single turn of thick wire already results in over 20V on the secondary. Wasted a lot of wire and time making one coil with 5 turns less and one with 10 turns less but the system would not even start with it. Seems these things need a fixed inductivity on the primary that matches the frequency used, in my case 36kHz. Would love to overcome this problem so I can at least go down to a single turn to get under 5V on the output side as space is non existing on these inverters. Can I cheat? Do I need to change the circuit to match the new primary coil? Am I thinking in the wrong direction altogether here? And added bonus would be to be able to adjust the power from around 15% to 100%, so far the electronics don't allow anything below 45%. Is it possible to drive these inverters in resonance? (Ok, off topic as I would like to use this for a beefy HV supply) Last thoughts: I know people already used Arduinos and Raspberries with displays and all but so far I have not found anything that shows how to do it properly. Seems all that counts is to create connection one way or the other and to call it a spot weld even if it is just a burn hole from discharging a capacitor bank through a needle like electrode.... For obvious reasons I don't want to create just another spot welder that makes a professional pee himself laughing about it. IMHO nothing beats personal experience with something but I don't really like wasting my time by trying what other people alread did a long time ago. So if YOU already built a MOT based spot welder and used for more than a few spots I would love to hear from you! Let me know what type you used, what problems or shortcomings you noticed or where you feel it just does not work out the way you expected it. From simple things like always getting bad sparks or arcing, over how easy or hard it is to get consistand results to whatever really annoys you while using your homemade spot welder. I hope that your feedback here will help me to write an Instructable on building a spot welder that does what you expect it to do, not once or twice, but everytime you use it. Mechanics might vary the same way the electrode style does but the weld should always be a proper weld that won't tear apart ;)

Topic by Downunder35m 1 year ago