EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: say2paul on April 25, 2014, 11:53:45 am
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While we open up any TV remote, we can clearly see carbon buttons on the rubber keypad and next to it is the circuitry.
How to connect Arduino/Micro-controller IO pins with remote control circuit?
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It's often a matrix, so you cant easily connect it directly to an Arduino/MCU
The easiest solution is to use a small 5v relay.
You can drive the relay from the Arduino and use the relay coil to short the two button tracks on the remotes PCB.
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It's often a matrix, so you cant easily connect it directly to an Arduino/MCU
The easiest solution is to use a small 5v relay.
You can drive the relay from the Arduino and use the relay coil to short the two button tracks on the remotes PCB.
Thanks dear, so one relay is sufficient for this?
And one more thing.. I can see the connector on one side only and there is no way I can solder them.
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Try tracing the connections back and solder to the chip. That's what I did years ago.
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4066
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While we open up any TV remote, we can clearly see carbon buttons on the rubber keypad and next to it is the circuitry.
How to connect Arduino/Micro-controller IO pins with remote control circuit?
WHY do you think you want to tap into the remote control circuitry?
The much more modern (and easy) method is to discover (by simple observation) what Infra-Red code the remote puts out, and use an 89-cent IR LED to simulate the signals.
Yes, another method is to use a 4066 chip for each four buttons you want to "emulate". Connect one of the 4066 "switches" across EACH and every button pad pattern.
Then by turning on each transistor switch, you simulate a single button-press. But people have not done this for decades because the IR LED method is so much easier and better.