In this post we learn how to build a homemade LED driver with dimmer and charger circuit for illuminating a 3D moon from a 5V USB source. The idea was requested by Mr. John Sweden. Specifications and Features I’ve been a visitor to your website for many years and wonder if I may ask your […]
Hobby Circuits
Mobile Phone Controlled Robot Car Using DTMF Module
In this project we are going to control a manual robot through our cellphone using DTMF module and Arduino. By: Ankit Negi, Kanishk Godiyal and Navneet Singh sajwan INTRODUCTION In this project two cell phones, one for calling and one for receiving the call are used. The phone receiving the call is connected to the […]
200, 600 LED Project on Mains 220V
The post details the construction of a 200 to 600 LED project, using series parallel LEDs for creating an alphabetical display sign board. The idea was requested by Mr. Mubarak Idris. Let’s Make a Blinking 200 String LED Circuit I need a blinking LED light that show”WELCOME TO” blink and then “COLLEGE OF ENGINEERING” base […]
Mains 220V Electronic Touch Switch Circuit
You can convert your existing mains 220V light switch circuit with the electronic touch switch circuit explained in this post. The circuit is built around the chip M668 and it employs just a handful of other components for implementing the proposed mains touch switch ON/OFF application. By Ritu Panday How this simple mains electronic touch […]
Musical Christmas Decoration Light Circuit
A very interesting musical Christmas decoration light circuit can be built using a single IC, and some other few passive components, let’s learn the details as furnished below. By: Ritu Panday How the Circuit Works The circuit of a selectable muti-musical song player with 5 sequential light pattern generator is discussed here using just a […]
220V Touch Lamp Circuit with Delay Timer
The proposed transformerless touch activated 220V delay lamp switch circuit enables the user to momentarily switch ON a table lamp or any other desired bed lamp during night time. By Tina Kamat How the circuit Works. Referring to the circuit above, the four diodes at the input form the basic bridge rectifier circuit for rectifying […]