In this post I have explained 4 innovative automatic staircase lamp controller circuits which will automatically switch ON and OFF the staircase lamps in response to an external trigger. We will discuss 4 concepts here, which are as follows: 1) Automatic Staircase Lamp Circuit using PIR The first automatic staircase light circuit describes a simple […]
Lamps and Lights
2 Best Current Limiter Circuits Explained
In this post I have explained 2 simple universal current controller circuits which can be used for safely operating any desired high watt LED. The universal high watt LED current limiter circuit explained here can be integrated with any crude DC supply source for getting an outstanding over current protection for the connected high watt […]
Li-ion Emergency Light Circuit
The post presents a simple Li-ion emergency light circuit with over charge and low battery cut off features. The Circuit was requested by Mr. Saeed Abu and Y0f4N. Technical Requirement My requirement is:(1) Circuit is Operated by Nokia standard cell phone charger (2) Battery nokia 3.7 volt (3) Auto ac to dc changeover system when […]
How to Connect 5mm LEDs to a 3.7V Li-Ion Cell
In this article I have explained regarding how to connect and illuminate a few 5mm LEDs using a 3.7V Li-Ion cell, normally used in cell phones. I keep receiving requests from the readers who seem confused with the connection details of 5mm LEds with a 3.7V Li-ion cell. The requests inspired me to write this […]
Simplest 100 Watt LED Bulb Circuit
In this article I have explained a very simple 100 watt LED bulb circuit using a few high voltage capacitors. The entire circuit could be built at a cost less than $25. I have already discussed many capacitive type of transformerless power supply circuits in this blog, however all these suffers from a couple of […]
Simple Solar Garden Light Circuit – With Automatic Cut Off
A very simple automatic solar light system for illuminating your garden passages can be built using some LEDs, a rechargeable battery and a small solar panel. The system automatically switches ON the lamps at dusk and switches them OFF at dawn. Main features Although the following simple automatic solar LED garden light circuit looks simple, […]