Let's Make Robots!


20Amp Motor Driver/Controller

I am looking for a 20 amp motor controller/driver. I prefer an IC, that way I can integrate my own driver circuitry, but if it is cheap (under 50) post it. I'd prefer if it could provide 20 amps per channel. It will be operating on 12VDC.

Servo controller using timeframes

I have four servos with the following specs:


What digital servo uses a Atmel 168 internally?

Several months ago I read a post on LMR about a digital servo that was controlled by a Atmel 168. Now when I say controlled, I don't mean hooking a servo to a microcontroller the normal way, I mean the motor controller board inside the servo had a Amtel 168 chip on it.

Just to clarify - I'm not trying to figure out how to control a servo with a microcontroller (like an arduino). I'm looking for a servo that uses an atmel chip on the controller board inside the servo.

Makes your servo moves in a smooth way
                          I’ve been working on this for a while and finally I have the courage to post the results. Read more

Controlling a DC Motor (Mabuchi FA-130)


I'm trying to run a Mabuchi FA-130 (#18100) DC Motor, it uses 3V and 2.1A when stalled. However, I did some measures and when I forced the motor to stall it consumed nearly 4A, but I think this was some sort of coincidence since It has never happened again.

I'm using a circuit similar to this one posted by Simon Z in his post:


(By Simon Z and taken from http://letsmakerobots.com/node/7990)

UGV Monster truck platform

I'm planning to build a UGV monster truck, based on a Tamiya Super Clodbuster. I've heard that it's a lot cheaper if you buy it in pieces. However, I ran into a bit of a dilemma. The stock monster truck comes with a speed controller. Do I need that too (I don't need any RC functions) or can a motor controller for Arduino or Basic Stamp do the job too. I already own a BS2 with BoE, but I would like to buy an Arduino because it's cheaper, open-source etc. Note: I'm still a beginner in robotics.

The Wii Nunchuck controller, might be a cool way to control your robot wirellesly, has a joystick, two buttons and an accelerometer inside. Related Links: Nunchuck … Read more

Led controller

Hi this is an led controller  there can only be one led on at a time it was on crocodileclips i don't know what its called but if anyone does that would be helpful. when A is high 0 is on if B is high 1 is on if A and B are high 2 is on and when A and C are high 3 is on or somthing like that.


Price: $40 USD
Hey guys, I just finished designing and building a microcontroller board. The microcontroller board is basically an Arduino with extra features. The Roboduino … Read more

A Playstation controller as remote controller

So, suppose i have a couple of those wireless radio serial modules.. I'd like to hook the receiver to my robot, and install the transmitter on a playstation controller. Now, given that i can make a protocol of my own, the question is: how can i interface with the controller buttons&joysticks ? i'd like expecially to read the analogic joysticks.. is it hard ? How is it build inside ?