I have an external circuit board with a button attached to it by 2 wires. I want to press the button via the Arduino. I cut the button out leaving me with two wires. When I touch them together it is the same as pressing the button. Okay, all very straight forward so far.
When I put one wire on the red terminal of my multimeter and the other on the black, it shows 5v. When I touch the wires together (simulated button press), the voltage drops to 0.
This should be simple but I've had a frustrating evening. How in the heck do I wire this up so my Arduino can make these wires "touch" and drop that to 0 volts?
Simulating a 0 volt button press
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- Franklin97355
- Posts: 23940
- Joined: Mon Apr 21, 2008 2:33 pm
Re: Simulating a 0 volt button press
If one of the wires is at ground potential 0v to ground or short with a multimeter resistance scale. hook that to the arduino ground and the other to a digital pin through a 270 ohm resistor. When you set the pin LOW it should act as a button press.
- Fozzie61
- Posts: 31
- Joined: Tue Jun 17, 2014 8:36 pm
Re: Simulating a 0 volt button press
Thank you very much! That's what I was doing but I didn't have the resistor in the mix. It made all the difference in the world. Works perfectly!
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