Nowadays, Arduino projects are very popular and they controls everything. They are easy to build and they are useful for learning electronics. This project is about Bluetooth Controlled Police Siren Sound Circuit with Arduino. Arduino UNO is the main controller and Bluetooth module is used for wireless control. With Bluetooth we can control lights and […]
9V Loud Speaker Sound Generator Circuit
This article explains about a 9V Loud Speaker Sound Generator Circuit. It is simple and is with low cost and it works on 9V DC power supply. It gives loud sound compared to simple buzzer. Therefore it is useful for alarms, door bells, alerts and projects. Here, common transistors are used so beginners can build […]
Simple Transistor Oscillator Speaker Circuit
Sound can be made using very few parts so many people think a buzzer is needed to make sound. However, this circuit proves something different. In this Simple Transistor Oscillator Speaker Circuit no buzzer is used. Instead a small speaker is driven by transistors and therefore the circuit itself creates sound. Moreover, it is very […]
Toy Organ Circuit using Transistors
Sound can be made using very few electronic parts. This Toy Organ Circuit using Transistors shows how music is made electrically. The circuit uses only two transistors and simple components. So here no IC, no coding and no complex parts are needed. When different push buttons are pressed the different sound tones are produced. Because […]
6V To 12V Lead Acid Battery Charger Circuit
This article for 6V To12V Lead Acid Battery Charger Circuit explains about a dual voltage battery charger circuit. Lead acid battery needs correct voltage for proper charging. This charger circuit gives correct charging for both batteries. LM317 IC is the main part of the circuit and it gives stable charging voltage. Battery voltage is selected […]
Transformer Based 12V DC 3A Power Supply Circuit
Need a strong 12V DC supply for our electronics projects? A stable and powerful DC supply is the heart of any electronics project. This Transformer Based 12V DC 3A Power Supply Circuit delivers clean and reliable power. It converts AC mains into smooth DC power and it provides high current with low noise output. It […]