The post presents a simple transformerless red LED sign circuit which can be made even by a novice. The circuit uses only a few high voltage capacitors, two resistors, and a few red LEDs…. nothing more. The circuit idea and the images were submitted by Mr. John Hungerford. The following email was sent to me […]
Newly Updated Circuit Projects:
Blinking an LED with Arduino – Complete Tutorial
The post comprehensively discusses a basic Arduino code implementation guide for blinking its on-board LED. The data was built, tested, and written by Jack Franko. CODE: for simply inbuilt LED on pin 13 of ARDUINO BOARD by default it is programed to blink frequently at 50 Mili Seconds as it in description it will […]
Compatible LED Tube Light Circuit for Standard Ballast Fixtures
In this article we will study a simple LED tube light circuit which could be directly replaced with faulty 40 watt T17 fluorescent tubes and fitted directly on the existing fixture. Thus the circuit is compatible with all standard iron ballast fixture assemblies. How Conventional Fixtures are Wired As shown in the below diagram, traditional […]
Bird in the Nest Indicator Circuit
In this post I have explained a simple infrared based proximity sensor circuit which is implemented to study birds and their behavior, by installing the circuit beside artificially made bird nests. The idea was requested by Mr. Jan Simberg. Technical Specifications I hope you have time to read these few lines. First of all thanx […]
IC 741 Low Battery Indicator Circuit
The proposed circuit was requested by one of the avid readers of my blog. It is a low battery warning indicator circuit using op amp IC 741 and can be used for monitoring a particular low battery voltage threshold. Circuit Operation The circuit may be understood with the following points: The entire configuration is wired […]
Make a Simplest Temperature Indicator Circuit
A very simple temperature indicator circuit can be built by interconnecting a single transistor, a diode and a few other passive components. Using Transistor as a Heat Sensor As we know that all semiconductors have this “bad habit” of changing its basic characteristics in response to ambient temperature changes. Especially basic electronic components like transistors […]