Arduino Uno Switch Circuit Diagram. A battery a pushbutton a resistor and an led. The arduino uno is really a microcontroller board based on the atmega328.
Based on the status of the switch which arduino reads continuously an led connected to the arduino uno will be activated. If you use the usb source it will just power up the 3 3v regulator since the. The first thing you may notice is that this example has no battery.
Because your arduino has a 5v pin and a gnd pin these take the place of the positive and negative of the battery and allow.
Here the switch is connected to digital pin 4 d4 and led is connected to digital pin 8 d8 of arduino uno. This schematic will act as the blueprint for building the physical circuit and the arduino code and serve as the starting point for any necessary circuit troubleshooting. A circuit diagram schematic is a drawing that shows how your circuit is going to connect together. Here the switch is connected to digital pin 4 d4 and led is connected to digital pin 8 d8 of arduino uno.
