Let's Make Robots!

DIY

Homemade digital compass

Some time ago OddBot posted this circuit for a homemade digital compass based on hall effect sensors:

Compass_Schematic.jpg

Unfortunately CircuitBurn couldn't make it work. However I'm inclined to try again. A cheap DIY compass would be great.

So if anyone has ANY idea as to how this could be achieved let's hear it. It could be an improvement on OddBot's circuits or something completely different and wacky :D

Homemade wheel encoder

Basically I just printed out one of these (laser printer recommended):

encoder_40_s.gif

...And attached it to a wheel (double sided tape recommended).

Then I hooked up one of these (a 2$ IR sensor: QRB1134):

qrb.jpg

...And attached it to the motor pointing towards the wheel.

Vacuum forming plastic parts.

Heres a few photos of my home made plastic vacuum former and its maiden test. If you don`t know what vacuum forming is check here, and youtube.

Essentially a sheet of heated plastic is placed over some kind of mould which then has the air sucked out from underneath it. The soft plastic schloops to the shape of the mould and when it cools you have yourself a robot part. It really does sound like schloop if you`re wondering.

P1000906-400.jpg

The Beast II - Evolution

Hi all,

 In case anyone wondered what happened with that dude with his wooden CNC machine, well I'm still kicking :)

I have finally reached a milestone with this guy, software seems fine, motors turn, everything is mounted back in it's place.

I have modified the Y axis to acomodate the Z axis, reprogrammed the motor controllers many times over and over, added radiators, killed and revived the arduino software .... etc, etc, ....

 And finally it came to this:

 

PAPERduino

This is a fully functional version of the Arduino. We eliminated the PCB and use paper and cardboard as support and the result is.. the PAPERduino :D

This is the the first version of the layout design, next we will try more designs, and another materials.

You just need to print the top and the bottom layout, and glue them to any kind of support you want. We hope that you start making your own boards. If you do, please share your photos with us, we would love to see them  ;)

DIY CNC router project

04/06 Update

Motors and driver chips arrived in a package with some stuff for other projects today. Can`t find much information about the motors online and they have some marks on the body but they should work great. I`ll breadboard a circuit up to test the motors later.

 P1000780-500.jpg

DIY Picaxe 28x1 USB Headphone Jack Programming Cable?

Hi, I'm somewhat new here.

 

I'm in the process of building my first Picaxe robot based on the 'Start Here' Bot. So far I've recieved  my motors and wheels from Pololu and my Picaxe 28x1 Starter Pack from Sparkfun Electronics. Sparkfun said that a programming cable wouldn't be included, but they charged quite a wad of cash for one, so I bought the kit anyway since I couldn't find it anywhere else relatively cheaply like I could here. The only other one I found cost like $60.00!

 

DIY wireless, possible or not?

Hi guys!

Sometime ago i had an idea in my mind about a DIY wireless link between, say, two MCUs. But the point is that i never tested it. I just wanted to know what you thought about it and if you think it could work (you are the electronic gurus after all :) )

It should work like this.

-Receiver has the antenna attached to the base of a darlington, and the signal received goes to the MCU (if not enough maybe i could make a bigger darlington, maybe three NPNs)

Thing-a-day: knit cook draw paint, make robots!

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On Thing-A-Day you can be part of a special, community driven makers experience. The topic is about making things share it with others on a daily basis throughout the February. In other words... experiment and fun with people who like to do so. I got the hint via Ranjit "Moonmilk" Bhatnagar. In his newsletter he wrote:

RC-servo to motor conversion   This is a smart little trick i had read about in the magazine "Elektor Electronics" a year ago. In 15 minutes you can turn your … Read more