DIY & Mini Projects Archive

In this post we will see how to make 100mhz FM Transmitter using Bc547 Transistor. The FM Transmitter is built using a crystal oscillator without the use of a winding coil. This circuit can operate …

This post describes how to build a High power Touch Sensor using three NPN Transistors. Two TiP3055 Transistors and one BC547 Transistor are used. This Touch Sensor Circuit is powered by a 12V DC Supply. …

This post describes how to build a 3.7V Li-ion Battery Charger circuit using TC3582DA. This Charger Circuit has Battery charging indicator and Battery full Indicator. When the Charging Indicator is Battery Charge, the Red LED …

This post describes how to build a wireless Ac Line Detector using BT136 Triac. This Line Tester is made up of BT136 Triac, BC548 Transistor and Two LED. This Line Tester is used to detect …

This circuit is used as voltage level indicator and short circuit protection circuit. The LED in it is used to determine the magnitude of the LED in which the Red Color LED stands for 10 …

This post explains how to control the speed of a 775 DC Motor using the 555 Timer IC. This circuit is high power and can be used to easily adjust the speed of the motor. …

Automatic 12V Battery Charger is used to charge 12v Battery. This charger controls the battery over charge. This charger automatically cuts off the maximum voltage of the battery when it reaches. Charges the battery when …