Let's Make Robots!
This is my hexapod robot. I call it the MicroHexTT. I dont have much space so i wanted to build a bot around the same size as an msrubug. The bot in whole is a … Read more

Color Sensor Algorithm


I know the video quality sucks I just wanted to give a view of  what it is doing. The black tube has the LDR in it to hide stray light. Below is a tabl eof the values I got for Red, Blue and Green when different color soda caps were put in front of the LDR. Now I need to take the raw values and put them into some sort of algorithm that looks at the difference between the values before a cap is put in place and after to determine the cap color.



Your basic "classic" Herbie the Photovore junkbot mouse-bot. Nothing too new on my version, except perhaps for the use of old bass guitar strings (two of them) and … Read more

Hand held battery vacuum cleaner

I bought a cheap battery powered vacuum cleaner from dealextreme to build into Ozzy. The idea was to build a front mounted vacuuming attachment as inspired by emullers vacuum bug. I was pretty skeptical of its sucking power and for about $6 with free shipping worldwide I wasn`t expecting it to be very useful. Now that it has arrived I can say yes indeed it does suck! In a good way!

Heres a small pre-hacking photo review.

RS232 Communication with MCU

So I am making my own CNC - PCB Miller. It is communicating with the computer using RS232 (UART), but in my testing, I find that I don't always get the correct characters, even at 1200baud. Does anyone have a method to suggest for error-checking an incoming data string over serial? I was thinking of doing something like this:

CPU sends data to MCU 4 times.

MCU checks to make sure the data is repeated exactly 4 times.

--If yes->send "OK" 4 times

--If no->send "NOT OK" 4 times

If CPU receives OK, queue up the next data to send

Cyclops is a obstacle avoider robot with one obstacle detector. This obstacle detector is prepared with an IR led and IR receiving module. To detect the obstacle … Read more

Hacked tyco rebound rc car, now I need ideas on what to do with it

Today I dug out one of my old childhood favorites, the tyco rebound. In case you've never seen one, the rebound has 4 wheels large enough so the car can flip itself over. Steering is done like a tank with no treads, each side going forward or backward. It's also FAST. I tore it open and it's built perfectly for modding. There are 6 wires attached to a circuit board. 2 for each motor and two coming from a 6 volt battery pack.

Price: $44.95 USD

 Collected by one member
4 volumes of MAKE year four are combined in a Special Edition Boxed Collector's Set. Read more
I am building this robot for a course i am currently enroled in, the Edexcel Extended Project Qualification (EPQ). This course requires you to complete a project of … Read more
It's a nice 5-AA battery holder, with 5" leads and a 2.1mm DC barrel jack. Read more
Price: $34.95 USD

 Collected by one member
SparkFun’s carrier board for the SCP1000-D01 absolute pressure (and temperature) sensor allows pressure measurements with 17-bit (1.5 Pa) resolution over … Read more

UART level translation, what type of translation IC is required?

I have two devices, and need to figure out how to translate between them for 2 wire UART.

U-Blox NEO-5G, 1.8V
Input low:  0.22V (MAX)
Input high: 0.91V (MIN)
Output low:  0.4V (MAX)
Output high: 1.4V (MIN)

Telit GC864
Input low:  0 - 0.5V
Input high: 2.1 - 3.3V
Output low:   0 - 0.35V
Output high: 2.2 - 3.0V

UBlox -> Telit
LOW: .4V (MAX) -> 0-0.5V   (WORKS)
HIGH: 1.4V (MIN) -> 2.1-3.3V (DOES NOT WORK)

Enhanced 20 pin microcontroller with individual pin control, 64MHz option and additional features including i2c/spi bus support. Read more