This is a Simple 12V Battery Charger Circuit using TIP41 Transistor. It uses one NPN power transistor TIP41 and one 13.8V Zener diode. The circuit is cheap, easy and safe for charging 12V lead acid battery. This circuit works for small 7Ah to 20Ah batteries. It is a good circuit for learning basic battery charging. […]
Arduino Sine Wave Output Circuit with RC Filter
This project show how to make simple Arduino sine wave circuit with RC filter. 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. Two potentiometer control amplitude and frequency. This circuit is very easy and good for small […]
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. It provides fixed 12V for small devices and general use. Big 100uF capacitor remove big AC ripple from rectified DC. Small 0.1uF capacitor remove small ripple from regulated output. […]
Natural Bird Sound Generator Circuit using Transistors
This is a small Natural Bird Sound Generator Circuit using Transistors. The circuit uses two BC547 transistors, some resistors, capacitor and a speaker. It is simple for beginners and works on low voltage like 3V to 9V. Circuit is good for toys, hobby projects, alarms and for school projects. Circuit Working: Parts List: Item Value […]
Arduino Chirping Bird Sound Circuit
This small Arduino project make cute bird sound like real chirping. Which make our room feel like forest Only one button press and tiny speaker sing like little bird. Sound is clear and fun, anyone can make in few minutes. Very low cost and with very easy wiring. This Arduino Chirping Bird Sound Circuit is […]
Arduino Pitch Control Circuit using Potentiometer
This is a small Arduino tone generator project. It uses Arduino Uno, one buzzer, one potentiometer to change the pitch. This Arduino Pitch Control Circuit using Potentiometer is simple and easy to make. It helps beginners understand PWM, analog reading and digital output. We can use this project to learn basic sound making using Arduino. […]