In this post I will show how to construct a SMS based water pump controller with automatic shutdown of pump when no water flow through the pump is detected. We will also construct another much simpler automatic dry run preventer circuit without GSM in the next half of the article. What is Dry Run in […]
Newly Updated Circuit Projects:
How to Measure Transformer’s Current Capacity
We can use a shunt resistor and ammeter concept to find out how much maximum current a transformer can give, in other words, we are trying to know the current rating or amp capacity of a transformer. If you do not wish to read the full article below, you can feel free to watch the […]
Battery Deep Discharge Protection Circuit
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 […]
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 85Vā265V 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 […]