Nowadays, Arduino projects are very popular and they controls everything, as they are easy to build and they are useful for learning electronics. This project demonstrates a Bluetooth-Controlled Police Siren Sound Circuit with Arduino, then the Arduino UNO acts as the main controller, while the Bluetooth module provides wireless control. Furthermore, with Bluetooth we can […]
Hobby Circuits
Transistor Based LED Alternator Blinker Circuit
This circuit is for simple Transistor Based LED Alternator Blinker Circuit; here, two LEDs blink one after another as this circuit uses two NPN transistors. This circuit is an astable multivibrator, also known as an oscillator circuit; also this project is ideal for beginners because it helps them learn transistor switching, and we can further, […]
Simple 9V Transistor Inverter Circuit
This is Simple 9V Transistor Inverter Circuit using 9V battery, which is very small and easy to make and which helps to understand DC to AC working. Circuit uses only few low cost parts and its output power is very low and also it is only for testing and learning and further is useful for […]
35V Dual Output Power Supply Circuit
This tutorial teaches us about the 35V Dual Output Power Supply Circuit, the circuit outputs is plus 35 volts and minus 35 volts, powering audio amplifiers and op-amp circuits. Circuit also uses transformer, bridge rectifier, big filter capacitors and further, its output becomes +35V, -35V and ground. Circuit Working: Parts List: Components Values Quantity Capacitors […]
Low Cost 1.2V AA Ni-MH Solar Battery Charger Circuit
This project shows about a Low Cost 1.2V AA Ni-MH Solar Battery Charger Circuit, as it works with small cheap solar panel and charges the battery safely in sunlight; also it uses only solar panel, diode, resistors and two transistors. Furthermore, these parts are few which are easy to find and circuit protects battery from […]
Solar Water Pump Circuit using Battery and MOSFET
In my earlier article I showed about solar water pump circuit using relay, that design works, but relay makes clicking sound and relay contacts can burn after long use. So now here is the new version and this project is Solar Water Pump Circuit using Battery and MOSFET instead of relay, as MOSFET has no […]