I have a momentary switch, with LED, that I want to hook up to the Reset pin on the Arduino Mega 2560.
Function: have the LED always on (can turn off if pressing button) and when the button is pressed, reset the Arduino.
Problem:
If I wire it as specified on the site diagram, 5v power to C (Common), Ground to other wire, and RESET Connected to NO, then the LEDs will work but pressing the button does not reset the Arduino.
If I put the Negative ground wire to Common then 5v to the Grounding pin on the switch, then the RESET will work but the LED will be one color. Which is ok BUT I don’t know if I’m going to ruin something doing it this way.
Thoughts? Ideas? Suggestions? Is this possible? Will I mess it up reversing ground/common on the switch?
Thanks!
Switch: Amazon.com: WerFamily Tri-color LED 16mm Momentary Push Button Switch 1NO 1NC SPDT ON/OFF Waterproof Metal Round (Power Indicator, Red Blue Green) : Industrial & Scientific
Diagram:
I might have figured it out, assuming the RESET pin is acting as power and putting that onto the C switch connector, then Ground on the NO pin.
You got the wiring right, but this is not the correct way of looking at the pin. The RESET pin is an input, like any other I/O pin on your board when you have used pinMode to configure it as an input.
The RESET pin is normally at a HIGH state (similar to the I/O pins when you use the INPUT_PULLUP configuration). When the pin is connected to ground (giving it the LOW state), the board is held in reset. When the pin is not connected to ground, it goes back into the HIGH state, which causes the board to go back into the normal operating mode where it starts the sketch program.
In case it is not clear, you might find it useful to experiment using a normal jumper wire connected to the RESET pin. Removing the complexity of the switch from the system for the duration of the experiment will allow you to more clearly see the effects of connecting the wire to the GND pin, connected to nothing, or connected to the 5V pin.
