The following simple analogue frequency meter circuits can be used for measuring frequencies which may be either sine wave or square wave. The input frequency which is to be measured […]
Digital Thermometer Circuit – Uses a Solar Cell for Power
The articles explains a digital thermometer circuit project that works without a battery. Instead of a battery the circuit utilizes a small solar cell and operates by deriving power from […]
Signal Injector Circuits for Quick Troubleshooting of all Audio Equipment
This simple signal injector circuits explained below can be accurately used for troubleshooting and alignment applications of all kinds of audio and high frequency equipment. 1) Using a Single IC […]
Function Generator Circuit using a Single IC 4049
In this post we will learn how to build 3 simple function generator circuits using a single IC 4049, for generating accurate square waves, triangle waves, and sinewaves through easy […]
Grid Dip Meter Circuit
A dip meter or a grid dip meter can be considered as a kind of frequency meter whose function is to determine the resonant frequency of an LC circuit. For […]
Simple Circuit Tester Probe – PCB Fault-Finder
This simple circuit tester can be used for detecting short circuits, abnormal resistance conditions, continuity breaks etc inside an assembled circuit board or a PCB. The indication will be through […]