In this article we talk about a few simple yet accurate transistor tester circuits which can used to identify whether a transistor is good or bad. Note: Please test *only* BJTs and MOSFETs (enhancement or depletion) with these circuits. Simple Good/Bad Transistor Checker using a Single LED Do you have a lot of strange old transistors […]
Circuits
2 Simple Milliohm Meter Circuits [Measure Low Resistances below 1 Ohm with these Circuits]
The low resistance measuring circuit I have explained below can be used for measuring all milliohm resistances below 1 ohm with extreme accuracy. The resistance to be measured can be as low as 0.01 ohm or 10 milliohm. The output of the circuit converts the resistance value to exactly equivalent volts, which means the output […]
How to Design Simple LED Driver Circuits
In this article I have explained how to design your own customized, simple LED driver circuits at home. We will learn how to calculate specific LED configurations for applying the LEDs with appropriate LED driver power supplies. In these driver power supplies I have explained two concepts one by using SMPS boards and the other […]
Cube Light Circuits
In this post I have explained how to make simple yet fascinating cube light circuits, in which LEDs are connected inside a plastic cube to produce interesting illuminating effects. All the designs presented below are very simple to build and do not involve any complex microcontroller or Arduino coding. Why a Cube Because cube lights […]
Simple LED Circuits
In this post I have explained how to build a few interesting LED circuits, and also learn how to connect LEDs correctly in a circuit. LED stands for Light Emitting Diode, which is actually a semiconductor diode which has the property of emitting light, when current is passed through it in the right direction, or […]
7 Automatic Street Light Circuits [Using Relays and Solar Panel]
In this article I will elucidate 7 useful yet simple automatic street light circuits using 220 V relays and solar panel. All the presented circuits can be used for automatically switching a lamp ON during night time and OFF during day time. What is an Automatic Street Light System An automatic street light system is […]