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  1. donkey

    precise speedometer

    so I got to thinking about a project I have in mind but to actually get it to work I need a speedometer and odometer. the idea is pretty easy plug a rotary encoder on the axle code a little bit and use some awesome calculations to get the end result... however there are a few issues with this...
  2. donkey

    2 batteries selector

    hey all was wondering if someone could help me out. I want to make a few items that need constant power but was using batteries. I thought about it and have devised a cunning plan but need some help with the design (As usual) so lets say i have 2 9volt batteries, I want the circuit to pick 1 (am...
  3. donkey

    new app

    dunno if anyone will use this but https://123d.circuits.io/ can help out desigining things. might be a good idea for people to upload their arduino questions so we can review it
  4. donkey

    slip ring connectors

    donkey submitted a new Showcase Item: slip ring connectors Read more about this showcase item here...
  5. donkey

    so i got a new toy

    Thanks to the wonderful Mongrel shark, I have a working 3d printer.. currently printing gears. next is an aluminium forge then liquid metal for t1000's I mean decorations....
  6. donkey

    making a game

    so I was surfing around my usual haunts and saw http://www.instructables.com/id/Quick-Connect-Circuits/ it got me thinking about a dominoes styles game that makes a circuit...... it is also a good idea for getting kids involved without soldering (well after you made the tiles for them)
  7. donkey

    How To Annoy Those Helping You Out

    so I am the lowest level of electronic Jedi (or sith) on here. but I review posts from time to time to learn things. one thing I find more annoying than anything is when people post a long winded explanation of an item, going into details about the weather, the brand of multimeter they used, the...
  8. donkey

    can i dodgy up a slipring connector?

    hey peoples. anyone know how to make a home made slip ring connector? I was hoping for 8 wires including data. I originally looked at headphone plugs and sockets but they stopped at 4, and am assuming would get noise on the line for data as always your help is appreciated.
  9. donkey

    robotic arm revisited

    hey guys, I have made some great design progress with the robotic arm. so now I am hoping to make the prototype. I am going to be using arduino's and motor shield as the code for most of what I want to do is out there. however I thought I would use a head end computer. I have 2 raspberry pi's...
  10. donkey

    am I mean????

    I live life saying exactly what's on my mind, except at Christmas.... below are a list of things I have done recently that makes me think I might be mean. A male approached a coffee shop where I work, the shop was closed and they were simply cleaning up. the male said "I would like a coffee...
  11. donkey

    Electronics for robotic arm

    ok so I am an arduino fan cos I suck at soldering. but anyway I am hoping people can help me out. I have the following design in my head raspberry pi - USB hub- arduino 1 -motor controller and rotary encoder, the last 2 will be repeated for each segment of the arm. can anyone tell me any issues...
  12. donkey

    recreating the wheel... or a 3d printer

    donkey submitted a new Showcase Item: recreating the wheel... or a 3d printer Read more about this showcase item here...
  13. donkey

    special connector i think

    ok so the bad picture above shows 2 cylinders that rotate independently of each other. I want to run a cord through the middle(red line) but imagine that each end has a connector. what I want is the wire in the middle not to twist so that both ends can turn continuously. besides making one...
  14. donkey

    electronic apps

    So anyway in my search to become the overlord of electronics I figure I would start... you now... learning and stuff. one thing I haven't found yet and hopefully we have a smart guy on here to do it, is a camera app for electronics. something that you can scan a part number and it pulls up a...
  15. donkey

    silly idea

    hey guys want to build a modified H-bridge which is actually a double H-bridge maybe even a triple a normal H-bridge gives a forward and reverse voltage and PWM. I am going to add a 3rd and 4th for left and right with PWM. and then maybe up and down too how would I read the outputs in a single...
  16. donkey

    recording computers

    Hey guys, trying to find a program like fraps but with a difference. what I want to do is plug a USB into a computer with a program on it... open the program without installing anything (cept temp stuff) record a short video back onto the USB close it down and go no there is nothing secret...
  17. donkey

    touch pad for fun

    ok so I got an idea for something that I am hoping to get working soon the difference between this guy and my design (he has code and schematic in description) is he uses an earth strap on his and with mine I was going to put a brass plate over the top with a small spacer(double sided tape)...
  18. donkey

    so I am going to get real annoying

    hey guys trying to give up on that nicotine stuff so you might see me around a bit while I try to stop urges making me do weird things like make a rail gun and take on the overlord Ra........ or something similiar
  19. donkey

    Arduino question

    ok people just very simply if I used an arduino mega and used every pin (54 in total from memory) how would it read all the sensors at once without drawing too many amps? am trying to make a gamepad with a few buttons and axes and they will be getting pressed or toggled in unison some times so...
  20. donkey

    telephone circuits

    hey people, I know there is an easier way to do this than I can think of so tell me, how can I make an intercom system with ringing phones? I am using it to replicate an EWIS setup for training purposes and am currently going with a 2 amplifiers to make life easy (but not cheap) I want to do a...
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