Tutorials on electronics for beginners, hobbyist, and experienced geeks. Electronics is a vast area that covers analog and digital systems. Codrey explains how to build your own analog circuits and transforming them into digital blocks.

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Relay & Electronics – A Quick Refresher

In this short post we will again take a nimble look at electromagnetic relays and the electronics associated with them. As we all know, an electromagnetic relay is a simple electromechanical switching device that uses […]

Little Noise Makers – A Quick Revision

I have already outlined many times here how to build very simple noise makers or noise generators. Also, there are many more outside this space, here is a randomly picked project example Arduino White Noise. […]

Programmable Gain Amplifier (PGA) – Random Talks

A programmable gain amplifier (PGA) is an electronic amplifier, typically based on an operational amplifier (op amp), whose gain can be changed by external control signals. Recently, I have been thinking about a basic programmable gain amplifier that can be quickly […]

Simple CMOS Bilateral Switch

This little post is to refresh your knowledge about the far-famed CD4066B CMOS Quad Bilateral Switch IC. The CD4066B is a quad bilateral switch intended for the transmission or multiplexing of analog or digital signals. […]

Shunt Resistor Secrets

Although there are many dedicated sensors and sensor modules to measure current, this post describes the more orthodox method using a shunt resistor! A shunt resistor is a power resistor with very low resistance especially […]