This article for Super Sensitive Intruder Alarm Circuit talks about very simple but strong intruder alarm circuit. It is very sensitive. These circuit is good for security. They can catch very small intrusions. This circuit uses IC 741 op-amp and IC 555 timer to work. It also use LDR (light sensor) as main part so […]
Simple Christmas Series Lights Tester Circuit
Christmas come one time in a year and it brings big joy. Simple Christmas Series Lights Tester Circuit is simple design. It checks and fixes problem in series Christmas lights. These lights are used for holiday decorate. If one bulb stops then all lights go OFF. One bad bulb break the whole circuit and makes […]
Understanding Photosensitive Devices Circuits
Photosensitive device works with light. When light hits the voltage or current changes. It can turn ON or OFF lamp, alarm or control system. They are used in auto lamp, sensors and safety circuits. Photocell: Photocell has special design. Light material is placed in zigzag between two metal contacts on ceramic base. Zigzag gives is […]
Simple Charger Breakdown Alarm Circuit
In electronic system good charger circuit very important. It give power to things like battery. This Simple Charger Breakdown Alarm Circuit check charger working or not. If problem found then buzzer makes sound. So user know fast if charger fails and this stop battery from drain or damage. It uses easy parts like transistor, resistor, […]
Simple Short Circuit Detection and Alert System
Simple Short Circuit Detection and Alert System is very important in power system. It stop damage when short happen. Short happen when positive and negative wire get touch. This make big current flow and can break parts or burn wire. Circuit uses 2 transistor, buzzer and LED to find and show short. If there is […]
Simple Boost Converter Circuit using IC LM2577
Boost Converter Circuit which is the step-up voltage regulator take low voltage and make it high. It is very useful when power source gives less voltage than needed. LM2577 is famous IC which helps make step-up circuit easy. This article for Simple Boost Converter Circuit using IC LM2577 shows how the IC works, give formulas, […]