Let's Make Robots!
moving arm with webcam controllable from web.
Using a
A cheap robotic arm based on the OWI arm. 5 potentiometers were added to give it a position feedback,plus one motor controller to control the gripper and motor … Read more
    I recently purchase some motorized ip – cams from Foscam. Read more

serial uart with only rx or tx not both

Can I deliver serial data from one direction to enother (2 mcu) only with tx :

MCU1                                       MCU2

      TX<-------------------------------------<RX

 

?

Components to put bw 3.3v signal and 5v

I have an Arm based platform with Serial UART interface but in 3.3v level.

I want it to communicate with my Arduino.

I have a 3.3v power source in the Arduino(Dumilinove).

My question is what components to put between the 3.3v platform RX/TX and the Arduino RX/TX ?

This is a test platform for me entering to robotics. at the moment there is only tracked chassis,gear-box twin motors,arduino,breadboard . soon I add the  GP2D120 … Read more
I stole/scavenge my son rc car attached the remote to the pc parallel port with a pnp transistor,I put an IP-CAM on it ,and controlled the all thing with a C# … Read more

Item similar to Ping))

found this item in ebay:

http://cgi.ebay.com/Ultrasonic-Sensor-for-Robots-Security-System-D-Robotics_W0QQitemZ140359202261QQcmdZViewItemQQptZUK_BOI_Electrical_Components_Supplies_ET?hash=item20ae0f75d5

is it similar to Paralaxx Ping))?  because with shipping it dramatically less expensive then  Paralaxx Ping)).