Tigran

Hi guys, I want to connect EV3 IR and ultrasonic sensors to my Arduino. Unfortunately I could not find any good documents describing how to use/control these sensors. Till now the link below is the best site I found. http://ev3.fantastic.computer/doxygen/UartDriver.html Unfortunately it is not enough to understand the synchronization between sensors and the Host. This is the description how it should be done: - Enable UART communication - Setup UART for LOWEST_BITRATE - Setup hardware buffers - Sync clocks - Wait for receive of byte <-. - If CMD is received skip to send INFO | - Check byte against SYNC | - If not SYNC increase UART clock --' - Send sync feedback - Exchange informations - Receive command data - Send command data (type,modes,speed, etc) - Receive info data - Send info data (name,scaling,data format, etc) - Receive acknowledge - When finished info send acknowledge - Switch to valid communication speed How can I know that the received byte is command or sync byte. It can be the payload byte with the same value as for command and sync. Any comments please? I already spent a loot of time trying to find useful information. Thank you very much.

For the NXT ultrasonic sensor the pin 1 is used as a 9V power input. For the other NXT and EV3 sensor it is used as an analog pin. I checked the following sensors: NXT Light sensor NXT Sound sensor NXT Touch sensor NXT Ultrasonic sensor Only NXT Ultrasonic sensor requires 9V supply.

EV3 sensors doesn't require 9V supply voltage. At least I checked the followings: EV3 Touch Sensor EV3 Color sensor EV3 IR sensor EV3 Ultrasonic sensor EV3 Gyro sensor If you look at the schematic of upper mentioned sensors you will see that the pin 1 is not used. 9V supply voltage is always provided to the sensors via pin 1. I didn't check the NXT sensors yet.

Hi, I'm creating the list of Lego sensors (RCX, NXT, EV3) which requires 9V supply voltage. The Lego compatible 3rd party sensors (for example Hitechnic, Dexter Industie, etc) can also can be included. Any contribution is very appreciated! Thank you very much.

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Hi Forum, I'm looking for the detailed dimensions of the Lego electric PF connector brick. Please see the attachment. I'm not sure that the name I mentioned is correct. I would like to know the dimensions of the electrical contacts even the used material. Thank you very much, Tigran