The self-locking switch is a common use button switch. When we fisrt press the button and the circuit of switch will be connection, it means self-lock. And when we press the button again, the circuit of switch will be disconnection. In this case, we are going to use the self-locking switch to control on and off of the LED.
The self-locking switch is usually a normal switch with a mechanical lock built in. When pressed down and released, it doesn’t bounce back automatically. Only after a second press will it unlock and fully release.
The experiment box included a self-locking button with a red hat.
Note: Please note the positive and the negative when you are connecting.