A joule thief circuit is basically an efficient, self-oscillating voltage booster circuit, built using a single transistor, resistor and an inductor, which can boost voltages as low as 0.4 V from any dead AAA 1.5 cell, to much higher levels. Technically it may seem impossible to illuminate a 3.3 V LED with a 1.5V source, […]
Newly Updated Circuit Projects:
Bidirectional Switch
In this post I have explained about MOSFET bidirectional power switches, which can be used for operating a load across two points bidirectionally. This is simply done by connecting two N-channel, or P-channel MOSFETs back to back in series with the specified voltage line. What is a Bidirectional Switch A bidirectional power switch (BPS) is […]
Dual Battery Charger Circuit with Isolator
In this post I have explained an innovative automatic dual battery charger with isolator circuit for alternators and engines, which allows monitoring of the charge levels of two individual batteries, and switching them across the loads appropriately. [New Entry] Single Op amp Dual Battery Charger Circuit The circuit working for the above single op amp […]
How to Create Air Gap in a Ferrite Core Transformer
In this article we are going to understand in detail how we can create air gap in a ferrite core based transformer which we are using in smps circuits like flyback or boost or forward type. Introduction We must understand that ferrite cores have very high permeability and they saturate very fast if we do […]
Smart Buck-Boost MPPT Solar Charger Circuit for 12V 24V Battery
In this post we are going to learn how we can make one real working smart solar battery charger circuit which can do MPPT charging. We are using Arduino Nano as the brain for controlling everything. We will also use INA219 sensor module so that we can read the solar voltage and current properly. And […]
Understanding IC 4043B, IC 4044B CMOS Quad 3-State R/S Latch – Working and Pinouts
In this post I have explained the pinout function and other important specifications of the IC 4043. I have explained about the complete datasheet of this very interesting chip. Pinout Datasheet of IC 4043 Technically the IC 4043 is a quad set/reset (R/S) latch with 3 logic state output. To be more precise this chip […]