View Full Version : Having IR Reciever power an LED

01-27-2006, 12:28 AM
Building my next robot.· I am a beginner.· Looked for clues in here and in the NV articles.

I want to have my robot light up and led that indicates the IR sensor is recieving an IR signal. This robot has 6 IR Sender/Reciever pairs, and utilizes·2 servos.·(Total·14 pins!)·(I have read the articles on the shift register IC's, and will do that next project)

I was wondering if there was any way to hook LEDs up to the input signal on the IR reciever line so they would light when the IR recieves.· Since the IR opens the voltage line, doesn't it.·

Thanks to all for the help!!!

Jon Williams
01-27-2006, 12:59 AM
You might try connecting the cathode of a low-current LED circuit (LED + resistor) to the output of your IR recievers; connect the anode to Vdd -- this should indicate activity on a particular IR receiver.

Jon Williams
Applications Engineer, Parallax

01-27-2006, 09:30 AM
Thanks Jon.· I understand why it works.· I thought it might be like that somehow.·