In this post I have explained how to build a battery deep discharge protection circuit which can be used for protecting any type of battery from over discharge through a connected load. Normally, we are mostly worried about battery getting over charged, and forget about a situation where the battery can get over discharged by […]
Newly Updated Circuit Projects:
220V AC to 12V DC Flyback SMPS Circuit using IC 555 (7555)
This practical flyback SMPS circuit uses ICM7555 as the main oscillator, and yep the whole idea is to take 220V AC mains directly then convert it into isolated low voltage DC through a ferrite transformer.. Unlike many PWM controller designs, here we have very few parts but still it gives mains isolation, voltage feedback, current […]
Build this 85V–265V AC to 12V 5A SMPS Design Using UC3843 (With Calculations)
This thing is a full SMPS design using UC3843, which takes wide AC input from 85V AC to 265V AC, then gives out 12V DC at 5A, so now it is like a universal input supply, which can be used for 110V AC supplies and also for 220V AC input supplies… Input Protection Stage At […]
220V SMPS Cell Phone Charger Circuit
In this post I have explained how to make a simple, cheap yet extremely reliable smps based 220V/120V mains operated cell phone charger circuit. Why TNYxxx Tiny Switch is Used The TNY series of tiny switch ICs provide us with an option of making perhaps the smallest possible smps circuits with high reliability. The tiny […]
Ferrite Core Air Gap Calculator Tool
You can use this calculator in your workshop or while designing an SMPS prototype, to find the exact physical gap required between your ferrite core pieces to hit your target inductance. Flyback Transformer Air Gap Calculator Flyback Transformer Air Gap Calculator Target Primary Inductance (Lp in µH): Primary Winding Turns (Np): Core Cross-Section Area (Ae […]
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 […]