LED VU Meter Circuit Using Transistors or IC
Here are some LED VU meter circuit using transistors or ICs with PCB. They show the signal amplitude from an amplifier using 4 to 40 LEDs. Read more
NPN transistor circuit
Transistor as Switch Experiment
Let’s try transistor as switch, to understand how they work, stop it, find Rb, and What you need to know to use transistors smoothly. Read more
Toy Organ circuit using transistors
Let’s play a simple toy organ circuit. My daughter has interested in piano. Believe it or not, we can create a simple piano circuit by ourselves. Read more
How does a transistor circuit works
Learn transistor circuit works, old parts But, we often use it. Because of durable, high current. Whether any reason. Let’s learn they works in simple way. Read more
Lie detector circuit
See and try building Lie detector circuit. The resistance of human skin using transistors and LED displays is small and easy application. Read more