This LDR Light Sensor Circuit using BC547 works by itself. When it is dark the LED turns ON. When light comes then LED turns OFF. LDR feels the light and controls the LED. No need to press any switch. Circuit is simple and is with very low cost. It is good for small night lamp […]
Transistor Circuits
Sound And Light Metronome Circuit using Transistors
Music needs rhythm. A metronome helps us keep that rhythm perfect. This small project for Sound And Light Metronome Circuit using Transistors turns light into beat. When light changes then sound speed also change. It is simple, fun and easy to build. What is Metronome: Metronome is small device that gives steady beat. It makes […]
Simple Human Touch Sensor Circuit with Transistor
A human touch can do magic! So this Simple Human Touch Sensor Circuit with Transistor shows how a tiny finger touch can switch ON a light; therefore, no switch, no button just a skin current makes it work. Also, it is a cool and educational mini project for learners. Circuit Working: Parts List: Components Values […]
Simple Battery Level Indicator Circuit
No More Dead Battery! Battery gone down? having no idea? then this Simple Battery Level Indicator Circuit can show battery level. Also, easy to make, cheap and works fast; furthermore, know when battery is full or low and is good for beginners and DIY lovers. Circuit Working: Parts List: Components Values Quantity Resistors 2.2k 1/4 […]
Logic XNOR Gate Circuit with Transistors
XNOR gate is one of the basic logic gates, as it gives HIGH output when both inputs are same. If both inputs are 0 or both are 1, the output becomes 1 and if one input is 0 and the other is 1, the output becomes 0; for this reason, the gate is also referred […]
Logic XOR Gate Circuit with Transistors
This is project is for Logic XOR Gate Circuit with Transistors and it uses transistors and resistors and also it shows how XOR logic works. Output is high only when inputs are different and therefore this circuit is good for students and beginners to learn digital logic. Truth Table for Logic XOR Gate: Input A […]