Here is simple but handy testing circuit for LM317 adjustable voltage regulator IC. I am sure it can be used to test other similar ICs like LM117, LM158, LM358 etc. The circuit is pretty straightforward. The circuit is based on normal configuration of adjustable voltage regulator. How it Works For details follow https://www.homemade-circuits.com/2011/12/how-to-build-simplest-variable-power.html A DPDT […]
Archives for 2014
Input Trigger Synchronized Monostable Timer Using IC 555
Here we study a simple IC 555 based monostable circuit whose output monostable time duration starts only after the input trigger is released thus making sure that the trigger ON time duration is added with the monostable’s pre-programmed ON time duration. The idea was requested by Mr. John Brogan Technical Specifications I would like to […]
5kva Ferrite Core Inverter Circuit – Full Working Diagram with Calculation Details
In this post I have explained the construction of a 5000 watt inverter circuit which incorporates a ferrite core transformer and therefore is hugely compact than the conventional iron core counterparts. Block Diagram Please note you can convert this ferrite core inverter to any desired wattage, right from 100 watt to 5 kva or as […]
Sine Wave Inverter using Bubba Oscillator Circuit
In this post I have explained how to make a simple sine wave inverter using bubba oscillator sine wave generator. The idea ws requested by Mr. Ritwik Naudiyal. Technical Specifications I am a 4th year B.Tech Student Electrical Eng. We are trying to make pure wave sine wave inverter using PWM and bubba oscillator for […]
What’s Islanding in GTI (Grid Tie Inverter)
One big issue that most GTI manufacturers struggle to implement effectively is, what is commonly known as “islanding”, the following discussion throws light on this important factor and tries to find a solution. The issue was pointed out and clarified by Mr. Dennis, I have explained more. What’s GTI Islanding G’day, With any luck at […]
Morse Code Flasher Circuit for Lighthouse
In this post I have explained a simple morse code lamp flasher circuit which may be used for model lighthouse signalling applications. The idea was requested by Mr. Frank Gardner. Technical Specifications I am in need of a unique flashing circuit. I have built several exact scale models of the light house at Yerba Buena […]