USB to UART circuit

Now a days computers are uses USB ports to interface external peripherals. If we wish to…

USB based zener diode regulator circuit

This circuit gives regulated DC power supply from USB port by using zener diode as a…

USB power mobile charger circuit

The USB power mobile charger circuit constructed by using zener diode (4.7V/400mW) and switching transistor SL100.…

USB desktop lamp circuit

This simple desktop lamp circuit gives enough light during night time work without disturbing others. Here…

Simple USB battery charger circuit

By using this circuit we can charge nickel – cadmium battery through USB port available in…

12 volt DC from USB port

USB ports available in computer, laptop provides 5V DC supply through VCC and GND pin. If…