A thermometer may be required for the precise measurement of temperatures. However, in many cases, an absolute value isn’t required and a relative estimate is sufficient. For example, the consumer […]
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Battery Deep Discharge Protection Circuit
In this post we learn how to build a battery deep discharge protection circuit which can be used for protecting any type of battery from over discharge through a connected […]
Letter Box Open Indicator Circuit
In this post we learn how to build a letter box open indicator circuit, which indicates through an LED if the letter box had been opened either by the postman, […]
How to Make IC LM339 Circuits
The IC LM 339 is primarily created to compare two input voltages and generate a corresponding output. Having said that, before we try to learn regarding the various LM339 based […]
3-Digit LED Capacitance Meter Circuit
This project is yet another test equipment that can be extremely handy to any electronic hobbyist, and building this unit can be a lot of fun. A capacitance meter is […]
Ni-Cd Low Battery Monitor Circuit using Lambda Diode
The main feature of this lambda-diode low battery indicator for Ni-Cd batteries is that, the circuit itself consumes almost zero current, until the set low threshold level is reached and […]