Power Supply Circuits

If you are working on electronics projects that need regular house voltage 220V AC. This voltage can be dangerous. To make it safe to use, you can connect a special device called a step down transformer. This transformer lowers the voltage to a safer level for your project and also includes safety features to protect […]

A low power ozone maker circuit uses a small amount of electricity to create ozone gas. This gas is made by zapping regular oxygen molecules O2 in the air with strong electricity, splitting them into ozone O3. Ozone can be helpful for cleaning the air, water and even killing germs. However, it is important to […]

Imagine a tiny computer microcontroller or Arduino that can not control strong currents directly. A relay is like a switch that can handle strong currents for things like lights, motors or heaters. To connect them safely, we use a translator transistor and a special isolator optocoupler. This lets the tiny computer tell the relay switch […]

This adjustable power supply circuit uses a surprising trick. The TDA2030 chip, normally used to crank up the volume for speakers can also be configured to act like a voltage regulator. With some clever circuit design, it can provide a stable DC voltage with adjustable output making it useful for powering electronics projects at different […]

This 220V AC to DC voltage converter circuit is like a tiny adapter for your gadgets. Your wall outlets provide AC alternating current, but many electronics, like phones, laptops and LED lights, need DC direct current to work. This circuit acts like a translator, taking the strong AC current from the wall and converting it […]

While it is great to know how to increase voltage output from a 7812 or 7805 chip, it is actually not recommended. These chips are designed to give a specific voltage 12V for 7812 and 5V for 7805. There are better solutions: If you need a different voltage, you can get a different voltage regulator […]