The Simple Current Limiting Circuit using the LM317/LM338 controls the current flowing to the load and these ICs also work as current limiters when we configure them properly. Here, power comes in as Vin and LM317/LM338 have 3 pins: input, output and adjust. Vin goes to input pin ad output pin (Vout) goes to load […]
Security and Protection
Thyristor Switching using Snubber Circuit
In this article, we discuss Thyristor Switching using Snubber Circuit, a thyristor acts as a switch in power electronics applications that handle high voltage and high current. Thyristor also called SCR (Silicon Controlled Rectifier) which turns ON by gate signal and to turn it OFF the current must stop; but when turning ON and OFF […]
Simple Crowbar Circuit
Simple Crowbar Circuit is safety part in electronics, as it protect from high voltage spike or surge; it work like fuse but does not burns and it gets short circuit fast to stop damage. Furthermore, it use SCR or TRIAC for shorting, transistor or Zener to trigger; also trigger watch voltage all time and if […]
Motion Detector Circuit using IC 555
This easy Motion Detector Circuit uses IC 555 to find human from far, as circuit have two parts: Transmitter: IC 555 work like astable multivibrator and it make square wave signal and this signal goes out through IR sensor (infrared). Receiver: Phototransistor see IR beam and if someone moves and block the beam then phototransistor […]
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 […]
Touch Alarm Circuit using IC 555
Touch metal part and buzzer makes sound and this uses IC 555 in monostable mode. IC 555 is good for learning in simple circuits and in this Touch Alarm Circuit using IC 555 when someone touches the metal plate then buzzer makes loud alarm. Circuit Working: Parts List: Components Values Quantity Resistors 1M 1/4 watt […]