Let's Make Robots!
Price: $17.99 USD

 Collected by one member
The I2C-RTC board is a 6-pin CMOS Real-time Clock device using I2C bus. There are no external components required. Read more

push-pull tri-state motor driver

I am working on a small bot that will use 1.5v pager motors and run from 2 AAA batteries.  The brains will be an 8 pin PIC. So I am looking for ways to conserve pins as much as possible.  I have been inspired by the Y bridge  and tri-stating work that I have seen here, but I am really aggressivly trying to reduce the part count on this bot.

Dagu Gear Motor Pain

I have been flumoxed by a motor issue recently, and was wondering if others had some strategy dealing with it successfully.

Robotic Arm Control

I have built a robotic arm. You can see it in the robot section. It is called IPTUPED.

Now that it is built i can only prgram it to pick up something that is in the same time. I need a new control method.

Due to the fact that i am pretty new to this i need some ideas. Basically i am asking you guys if you can help me find a good method. I have seen wii and arduino, nd rc. I need a good tutorial online somewhere that can help me control it. So far i have only been able to find a method that can control 2 servos. I am using 4 and maybe 5 in the future. Thanks for any help.

Start here kit posted by Frits---- Problem with Motor Driver and Sharp

This is my first robot ever, and I seem to have a problem with the 

Object tracking servo jitters... in only one direction?

I've come across a problem during the fine-tuning of my object tracker. When the "neck" servo is steadily decending positions (turning to the left) the movement is smooth, even with decrements > 1. It acts completely different when turning right. There is a distict pause between each SERVOPOS and I noticed it takes longer to process a debug cycle as well. The head shakes, rattles and rolls, the values used to adjust turning speed based on object distance are insufficient, and it just looks terrible.

Coaxial helis

I sorta got into "flying" robots recently and I have found answers concerning most of my questions, but there is a particular thing I don't understand about helicopters; how do the coaxial system work (I mean, how can I make one from scratch). I understand that each rotor cancels the other's torque, but how does all this mechanicaly work? Are the rotors dependant on each other for speed (I suppose that's not true because the heli turns probably by increasing torque generated by one rotor and decreasing torque on the other).

The Uno32 is an Arduino-compatible platform combining Arduino compatibility with the performance of the Microchip PIC32 microcontroller -- core running at 80Mhz, … Read more
Price: $34.95 USD

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This cylindrical, 2.69″ × 0.98″ × 0.98″ brushed DC gearmotor with a 171.79:1 metal gearbox is a lower-current alternative to our 25D mm … Read more

LMR series of PCB's

I think that LMR should have its own series of circuit boards, with the designs open source for all LMR'ians to use. Heres a couple ideas for PCB's:

Anyone used the Propellor system + Spin? Thoughts?

Just wondering if I can get some feedback on the Propellor system?

 

Specifically this one:

http://gadgetgangster.com/find-a-project/56?projectnum=257

 

In theory, it's like a multi-core Arduino, but without the Analouge channels. I like the idea of lots of cores, it should make coding easier - less hassle with interupts. I can cope without Analouge, as there is always ADC available as a breakout board. You can also call on a 32Mb memory via a shield, which is also nice.

Price: $41.99 USD

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So you want a affordable GPS unit right? Well, how about a GPS unit that comes with Bluetooth, RS-232, and USB-TTL on board, and an external magnetic antenna (with … Read more
I show you data on your LED so you can save some power on your LEDs.
My program shows you all of the data on your Led from the first light to the normal operation light. From that data you can pick an RS that is good light, but lower … Read more