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Power Supply Circuits

Arduino Battery Charger Circuit

Last updated on 2 July 2026 by Admin-Lavi Leave a Comment

This article show how to make a simple Arduino Battery Charger Circuit. Here, charger stop and start charging using MOSFET and then Arduino read battery temperature with TMP36 sensor and decide safe charging. Additionally, circuit is simple and work with basic components. Arduino Code: Code Explanation: Circuit Working: Parts List: Components Values Qty Resistors 10k […]

Filed Under: Arduino Projects, Battery Charger Circuits, DIY Projects, Power Supply Circuits

Simple 12V Battery Charger Circuit using TIP41 Transistor

Last updated on 2 July 2026 by Admin-Lavi Leave a Comment

This is a Simple 12V Battery Charger Circuit using TIP41 Transistor, as it uses one NPN power transistor TIP41 and one 13.8V Zener diode. Furthermore, the circuit is cheap, easy and safe for charging 12V lead acid battery and works for small 7Ah to 20Ah batteries also, further, it is a good circuit for learning […]

Filed Under: Battery Charger Circuits, Mini Projects, Power Supply Circuits, Transistor Circuits

7812 Based 12 Volt DC Power Supply Circuit

Last updated on 2 July 2026 by Admin-Lavi Leave a Comment

Many electronic projects need 12V clean power for output devices like LCD, graphic LCD and DC motors. A simple AC to DC converter using 7812 regulator, provides fixed 12V for small devices and general use; also big 100uF capacitor remove big AC ripple from rectified DC. Then small 0.1uF capacitor remove small ripple from regulated […]

Filed Under: Mini Projects, Power Supply Circuits, Voltage Regulator

Voltage Vs Current Explained Simply

Last updated on 29 June 2026 by Admin-Lavi Leave a Comment

Voltage and current drive electricity and electronics; beginners often confuse them because they operate together in circuits, but they represent fundamentally different concepts. In addition, voltage and current anchor electricity and electronics, beginners often confuse them because they interact in every circuit, but they are entirely different concepts. Voltage is the pressure or force that pushes […]

Filed Under: Power Supply Circuits, Tutorials

Simple Battery Level Indicator Circuit

Last updated on 24 June 2026 by Admin-Lavi Leave a Comment

No More Dead Battery! Battery gone down? having no idea? then this Simple Battery Level Indicator Circuit can show battery level. Also, easy to make, cheap and works fast; furthermore, know when battery is full or low and is good for beginners and DIY lovers. Circuit Working: Parts List: Components Values Quantity Resistors 2.2k 1/4 […]

Filed Under: Battery Charger Circuits, Indicator Circuits, Mini Projects, Power Supply Circuits, Transistor Circuits

Simple DC Bulb Circuit

Last updated on 24 June 2026 by Admin-Lavi Leave a Comment

Want to light up a bulb by using just a battery and switch? then this Simple DC Bulb Circuit is the easiest way to understand how electricity flows and powers small devices. Also, a perfect starting point for anyone new to electronics. Circuit Working: Parts List: Components Values Quantity Battery 9V 1 On/Off Switch SPST […]

Filed Under: Hobby Circuits, LED and Lamps, Mini Projects, Power Supply Circuits

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