In this post I have explained how to build 10 simple yet useful function generator circuits using IC 4049, IC 8038, IC 741, IC 7400, transistors, UJTs etc. for generating accurate square waves, triangle waves, and sinewaves through easy switch operations. 1) Using IC 4049 Using only one low-cost CMOS IC 4049 and a handful […]
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4 Useful Logic Probe Circuits Explored
These simple yet versatile 4 LED logic probe circuits can be used to test digital circuit boards such as CMOS, TTL or similar for troubleshooting the logic functions of the ICs and the associated stage. What is a Logic Probe A logic probe circuit is a handheld electronic tool which can be used to test […]
5 Useful Power Failure Indicator Circuits Explained
In this post I have explained 5 useful power supply failure indicator circuits which can be used to get an instant indication regarding an input power failure situation. This post includes the following 5 types power failure indicator circuits: Main Function The main function of the proposed power failure indicator circuits is to alert or […]
6 Useful DC Cell phone Charger Circuits Explained
A DC cell phone or mobile phone charger is a device which charges a cellphone from an available DC supply source. The device converts the unregulated DC source into a constant current and constant voltage output which becomes safe for any mobile phone charging. In this article I have explained how to build DC to […]
10 Useful Active Filter Circuit Diagrams Explored
In this post I will comprehensively discuss 10 different types of active filter circuits which can be used for filtering music and audio with the desired levels of bass and treble effects. We also learn about their working, types, characteristics, and practical applications circuits. Contributed By: Ken Madison In audio signal processing circuits, filters are used […]
2 Useful Energy Saver Solder Iron Station Circuits
In this post I have explained how to build a energy efficient soldering iron station circuit for achieving maximum power saving from the unit, by ensuring that it is automatically switched OFF when not being used for sometime. Written and Submitted By: Abu-Hafss DESIGN#1: OBJECTIVE To design a circuit for solder iron which would not […]