Basic push button circuit
Push the button and the LED lights up! Wow.
Ingredients:
1 Breadboard
1 Red LED
1 560 ohm resistor
1 Momentary push button
Two jumper wires
1 3V coin battery
Tape one end on the first jumper wire to the positive(+) side of the coin battery. Tape one end of the second jumper wire to the negative(-) side of the coin battery.
This is the power source for the circuit.