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power supply TP4056

TP4056 Lithium Battery Charger Module

Pictures of TP4056 Lithium Battery Charger Module:

ee-diary•8/25/2026 08:33:00 AM

buck converter CN3791 IoT power supply

CN3791 Solar Panel Li-ion Battery Charger for IoT

Here I am writing note on how to use the CN3791 IC for solar powered Li-ion Battery Charger that can be useful for IoT project like IoT Methane Emission Monitoring, Recording Project . Specifically, I will be writing about how to build the buck co…

ee-diary•6/13/2026 06:34:00 PM

inverter power electronics power supply TL494

Measurement & Waveform Analysis of TL494 Modified Sine Wave Inverter

Welcome back to the second part of our TL494 Modified Sine Wave Inverter series. In our previous tutorial ( Push Pull TL494 Inverter to Modified Sine Wave Inverter ) , we covered the full circuit build and the function of each component. Today, w…

bushan•4/29/2026 04:19:00 PM

power supply

Single 3.7V Li-ion Battery Charger Circuit Explained

Here it is explained how a single 3.7V Li-ion battery charger circuit works. The circuit is a  Switching Mode Power Supply (SMPS) battery charger circuit, specifically called a  "Self-Oscillating Flyback Converter" (also known as a RCC -…

ee-diary•4/19/2026 10:38:00 PM

power supply PWM controller TL494

How 12V to 220V AC TL494 Inverter Works - Simulation

This is the 3rd part of my note on building a diy 12V to 220V AC Inverter using TL494 PWM controller IC. In the previous notes  How to Design 12V DC to 220V AC Inverter Circuit  and  DIY 12V DC to 220V AC Inverter using TL494 PWM , I showed how to…

ee-diary•4/19/2026 05:48:00 AM

power supply PWM controller TL494

DIY 12V DC to 220V AC Inverter using TL494 PWM

This is second part of the tutorial on how to build a diy 12V DC to 220V AC inverter using TL494 PWM controller. Here I will be adding some components that remained to be connected in the unfinished circuit schematic of the inverter. These include…

ee-diary•4/18/2026 06:31:00 PM

arduino buck converter power supply Voltage Regulator

Redesigned Arduino Based Buck Converter : N-Channel vs. P-Channel Buck Converter:

I wrote about how N-channel MOSFET on the high side in buck converter design and why it will not work in my previous note  Why High-Side N-Channel Buck Converters Fail . Although there is advantage to using n-channel on the side which is that the …

ee-diary•4/09/2026 05:03:00 AM