In this article you will learn how to build a laser tripwire and alarm out of Snap Circuits. You will build two circuits: the laser tripwire circuit and the alarm circuit. The alarm is a very simple two-transistor oscillator that is switched on by the relay in the laser tripwire circuit. Once you have built […]
In this article you will learn how a single-pole single-throw switch works. You will learn how to build a simple circuit and to understand Direct Current (DC). I used Snap Circuits to demonstrate this circuit because it is easy for you to understand what’s going on in a circuit as you learn by doing; that […]
In this article, you will learn how to improve your collection of Snap Circuits blocks by adding a 555 Timer IC. You will learn the functions the pins on the 555 chip. You will learn that when the 555 is in astable mode, the output of pin 3 is a continuous stream of pulses called […]
