This is a small Natural Bird Sound Generator Circuit using Transistors. The circuit uses two BC547 transistors, some resistors, capacitor and a speaker. It is simple for beginners and works on low voltage like 3V to 9V. Circuit is good for toys, hobby projects, alarms and for school projects. Circuit Working: Parts List: Item Value […]
Transistor Circuits
Laser Security Alarm Circuit using LDR and BC547 Transistors
This project is for Laser Security Alarm Circuit using LDR and BC547 Transistors. It uses LDR, two BC547 transistors, one diode and a buzzer. When laser light breaks an alarm rings. Circuit is cheap and very easy to build. Good for door security, box security and drawer protection. Circuit Working: Parts List: Component Value Quantity […]
Smart Street Light Control Circuit
Light ON at night and light OFF in day all automatic! All this is done with one LDR and a BC547 transistor. This Smart Street Light Control Circuit is a easy and simple way to save energy. There is no manual effort and no energy waste. Circuit Working: Parts List: Component Name Specification Quantity Resistors […]
LDR Based Dark Sensor Circuit
This small LDR Based Dark Sensor Circuit is very smart. It can see light and dark using LDR. When there is light, everything stay quiet. When it becomes dark then LED start to glow and buzzer makes sound. No need to touch anything it works by itself. It is easy to make with low cost […]
LDR Light Sensor Circuit using BC547
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 […]
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 […]