Power Supply Circuits

In this article How to Interface Microcontroller and Arduino with Relay first we need to think about small computer like Arduino which cannot control big current. Relay is like one switch and it can handle big current for motor, light and heater. To connect safe we have used one transistor like translator and one optocoupler […]

This Adjustable Power Supply Circuit using IC TDA2030 can change the voltage it uses small trick which is little bit surprising. The chip TDA2030 is normally for making speaker sound loud and can also work like voltage controller. With smart circuit design it gives steady DC voltage. We can change output which is good for […]

This 220V AC to DC Voltage Converter is small circuit like small adapter for our devices. Wall socket gives AC power but many electronics like phone, laptop, LED light they need DC power to work. This circuit work like translator, it take big AC power from wall and change it to smooth DC power so […]

It is good to know How to Increase Voltage Output of 7812,7805 ICs chip but not a really good idea. These chip are made to give fixed voltage like 7812 give 12V and 7805 give 5V. Better way is this: If we want other voltage just buy other voltage regulator chip. There are many different […]

This Variable Power Supply Circuit using 7805 or 7812 ICs work like smart adapter. It use chip like 7805 or 7812 which normally gives 5V or 12V and add some other parts like resistor and turning knob like potentiometer. These extra parts help change the voltage up or down so we can set what our […]

Think Simple 3 Ampere Adjustable Power Supply Circuit using IC LM350 is like super cool power adapter for our electronics project. This circuit uses one chip called LM350 it is strong and give very good power. It can give power up to 3 amp and voltage we can change from 1.25V to 25V. So we […]