Simple 24V Lamp Flasher Circuit using Transistors makes 24V lamps blink back and forth with non stop. It uses transistors to turn two lamps ON and OFF one by one like astable multivibrator. This circuit is good for signal use like warning or decoration lights with steady blink. We must use 24V DC power to […]
Transistor Circuits
Transistors Based Megaphone Circuit
Transistors Based Megaphone Circuit uses transistor like amplifier. Take weak sound from MIC and makes loud sound in speaker. It is used in public talk, sports, rally anywhere we need loud voice. The circuit have two TIP32 transistor in push-pull to boost sound. It work with 12V battery or 12V DC power. Circuit Working: Parts […]
9V Battery Powered Transistor Intercom Circuit
Intercom system is device for talking at short distance. 9V Battery Powered Transistor Intercom Circuit uses 9V battery which is good for home or office talk. It uses only transistors which is easy to understand and works well. The circuit has mic and small speaker as sound. BC547 transistors make sound loud and 2N2222 transistor […]
Transistor Based Battery Heater Circuit
Transistor Based Battery Heater Circuit uses 12V DC with good heat and very portable. Circuit is good for outdoor, no-electric place, small incubator and emergency heat. It uses astable multivibrator with transistors. Transistors switch power transistor and run heat coils. LED show if circuit is working. Circuit Working: Parts List: Component Value Quantity Resistors (All […]
Ni-Cd Battery Charger Circuit using Transistors
Nickel Cadmium (Ni-Cd) batteries are very common for rechargeable use. They give good power and work long time with many charges. To charge them right we need a special charger made for Ni-Cd. Mostly it is for 12V Ni-Cd battery pack. This article for Ni-Cd Battery Charger Circuit using Transistors shows simple and strong charger […]
Simple Car Headlight Timer Circuit using Transistors
Simple Car Headlight Timer Circuit using Transistors is cool design. It keeps car headlights ON for 1.5 minutes after engine is OFF. It is very useful in dark place which gives light for short time. Circuit uses easy parts like transistors, resistors, capacitor, relay and few more. These all work together for timing. This article […]