Sun gives free energy every day and we can catch this energy and store in small batteries; also this Simple Solar Battery Charger Circuit does this job with very few parts. Just one solar panel, one diode and four NiMH cells, with no complex electronics and no hard wiring and is good for beginners, students […]
Mini Projects
USB Powered Small Battery Charger Circuit
Here is a super easy USB powered battery charger circuit, which requires no microcontroller or fancy parts; hence, we can build it using just a simple resistor, a diode, and NiMH cells. Also, good for learning, good for small projects and is safe for small rechargeable cells and great for DIY makers. Circuit Working: Parts […]
Simple 12V Battery Charger Circuit using TIP41 Transistor
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 […]
Arduino Sine Wave Output Circuit with RC Filter
This project show how to make simple Arduino sine wave circuit with RC filter; as Arduino cannot give real analog output, but it only gives PWM signal. So we use low pass RC filter to change PWM into smooth sine wave; also two potentiometer control amplitude and frequency, therefore, this circuit is very easy and […]
7812 Based 12 Volt DC Power Supply Circuit
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 […]
Arduino Chirping Bird Sound Circuit
This small Arduino project make cute bird sound like real chirping and also which make our room feel like forest; with only one button press and tiny speaker sing like little bird, sound is clear and fun, anyone can make in few minutes. Therefore, this Arduino Chirping Bird Sound Circuit has a very low cost, […]