This article for Self Discharge Battery Protection Circuit teaches how to make one easy circuit to protect car battery (lead acid type) when not using. Also, this circuit help battery live more long time and keeps it healthy. WARNING: Making lead battery for car can be dangerous, so try to do this with one big […]
Security and Protection
Simple DC Over Voltage Protector Circuit
To begin with, main purpose of Simple DC Over Voltage Protector Circuit is to save electronic parts or circuits from damage when voltage from DC power source become too high. Also, this type of circuit works very well in many applications that need stable and fixed voltage. Circuit Working: Parts List: Components Values Quantity Variable […]
220V Over Under Voltage Cut Off Circuit using Transistors
This 220V Over Under Voltage Cut Off Circuit using Transistors help to protect electric things from too high or too low voltage, it also uses two transistors and some easy parts. First, when voltage goes too much high or too much low then circuit cuts the power, also it is good for home use and […]
Simple Lie Detector Circuit using Transistors
Have fun making this Simple Lie Detector Circuit using Transistors. Real lie detectors are very hard and complicated so this one is not perfect; but it is fun way to see how body react when its in stress. Also, this circuit works by detecting changes in sweat to check whether someone may be telling the […]
Simple Metal Detector Circuit
This article show a special trick to make a Simple Metal Detector Circuit, which uses simple circuit not like other circuits and needs only one transistor. The circuit find metal by catching signal from a normal radio. What is a Metal Detector: A metal detector is an electric circuit that checks whether metal is nearby, […]
Infrared (IR) Sensor Alarm Circuit using TSOP1738
This tutorial show how to make a Infrared (IR) Sensor Alarm Circuit using TSOP1738, which finds intruder using light which we cannot see. Also, this alarm circuit uses infrared light so people call it IR alarm, which make one invisible light beam with small chip named IC 555. Moreover, if someone walk in front of […]