Arduino Stepper Motor – A Quick Revision
After seeing an inspiring post on a website about making a simple automatic pet feeder using a cheap stepper motor, I decided to re-do some trivial experiments with it. For that I chose the very […]
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. […]
Adaptive Arduino Night-Light
Arduino is certainly a great microcontroller platform for STEM kids as it provides a wide range of learning opportunities for both students and teachers. So, this post is all about making your own smart night-light […]
Touchless Live Wire Detector – STEM Fun
This post explains how to make a simple touchless live wire detector that can be used to find hidden electrical wiring in a wall or ceiling. This battery powered tester is actually a very simple […]
Discrete Linear Voltage Regulator – Design Sparks
There are certain applications that require only very low current and loose output voltage regulation. For such applications, a linear regulator made of discrete components is a quick and easy solution. For those who want […]
Photosensitive Bristlebot – STEM Edition
Bristlebot is a great easy way for kids to start to learn basic electronics. Bristlebot is perhaps the simplest form of a walking robot with a rigid bristle toothbrush body. It seems simple, a Bristlebot […]
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 […]