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 […]
Transistor Circuits
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 […]
12 Watts Amplifier Circuit using Transistors
12 Watts Amplifier Circuit using Transistors make sound louder in audio systems. 12W amplifier uses op-amp with NPN and PNP transistors. It gives strong output for 4 ohm speaker. This circuit is good for audio lovers and boost weak sound to loud, which is clear and with good quality. Circuit Working: Parts List: Component Specification […]
Simple 555 Timer Based Transistor Tester Circuit
Transistors are very important in electronics. They make signals strong and turn things ON/OFF and do many jobs. To check if its good then we need to test them. Testing helps find problems and broken parts. This article for Simple 555 Timer Based Transistor Tester Circuit show easy way to test transistors with 555 timer […]
Building an Auto Street Light Circuit using IC 741 and Transistor
This post talks about Building an Auto Street Light Circuit using IC 741 and Transistor. It turns ON at night and OFF at day. This circuit is simple and saves energy. It uses relay to control light, LDR to sense light, BC547 transistor drives relay and IC 741 works as a comparator. It is an […]