Simple Tilt Sensor Switch Circuit control ON/OFF of LED or buzzer, also this tilt sensor work like small seesaw switch. In this circuit , inside a sensor there can be a small metal ball. When sensor stand straight the ball touch two points and then the current can pass and when sensor tilts the ball […]
Hobby Circuits
Simple Door Keyhole Light Circuit
When ON, small device like Simple Door Keyhole Light Circuit gives light to keyhole, as it helps to put key in hole when light is low. Also, it uses light sensor and circuit to check light level, hence, to switch it by light we used transistor and LDR. Circuit Working: Parts List: Components Values Quantity […]
Simple Electronic Candle Circuit using LDR
This article for Simple Electronic Candle Circuit using LDR is fun and easy project to make fake candle with LED, as it uses LDR to make LED flicker like real flame and turns ON when its dark; also LDR controls the LED. Furthermore, in bright light the LDR has high resistance so LED stays OFF […]
Boost Converter Circuit using IC 555
A Boost Converter Circuit using the IC 555 increases a low DC voltage to a higher DC voltage; in this circuit, the IC 555 generates a PWM signal that controls the switching components and regulates the output voltage. Also, other parts used are IRFZ44N, inductor, diode, resistor and capacitor. Circuit Working: Parts List: Components Values […]
Amplifier Speaker Turn-On Delay Circuit
As name say this Amplifier Speaker Turn-On Delay Circuit wait few seconds before connecting speaker to amplifier. When amplifier is first turn ON then big “thump” noise can happen and this delay stop that bad sound. Circuit Working: Parts List: Components Values Quantity Resistors 33k 1/4 watt 2 1k 1/4 watt 1 Capacitors Electrolytic 100μF […]
Tachometer Circuit
This easy to build Tachometer Circuit is a small DIY tool to check speed of rotating shaft or disc; we used tachometer to know how fast shaft or wheel spin in RPS (revolutions per second). Furthermore, this simple circuit uses two 7-segment displays and one slotted opto sensor MOC7811 where all parts are easy to […]