We are getting many genuine requests from elderly readers who are suffering from different health related problems and one very painful condition among them is Dry Mouth also called Xerostomia. Real Life Dry Mouth Problem One of our respected readers from South Africa who is now 76 years old shared his real life suffering with […]
Archives for 2025
SG3525 Inverter Circuits with Low Battery Cut-off and Overvoltage Regulation
In this post I have explained a 3 powerful yet simple 12V inverter circuits using a single IC SG 3525. The first circuit is equipped with a low battery detection and cut off feature, and an automatic output voltage regulation feature. You may also want to read how to design a sine wave inverter from […]
IC LM393 Complete Datasheet with Circuit Diagram
Here we are going to discuss about LM393 that is a very popular dual voltage comparator IC. I will try to explain everything step by step so you can understand. We will see the ratings, the pinout, the electrical values, the formulas and also the way we can use it in real life circuits. General […]
Simple 220V RGB LED Bulb Circuit for Christmas, Diwali Decoration
In this post I will explain this 220V RGB slow fading LED bulb circuit step by step and we can start from the left side and slowly move toward the right side so that you can understand what each block is doing. We use many parts like 555, 4017, 33uF, D1 to D4, and others […]
8 Channel Lighting Sequence Generator Circuit for Christmas, Diwali Decoration
In this post I will explain how to make one full adjustable lighting sequence generator which can control and illuminate many external bulbs through triacs in many different running patterns. We can make it so that user can change and select any sequence pattern easily. We will use Arduino for the full control part. Let […]
DPDT Relay Working, Pinouts, Testing Explained
In this post we are going to understand about how this DPDT relay actually works, how we identify its pinouts, and how we can use it in our projects. We shall go step by step so that you can feel confident with every small thing about it. Introduction We know that a DPDT relay means […]