One of the most useful things you can do with an Arduino is control higher voltage (120-240V) devices like pumps, fans, lights, heaters etc. Since the Arduino operates at 5V it can’t control these ...

Have you ever needed to power a 12-volt relay in a circuit but only had 6 or 9 volts available? This simple circuit will solve that problem. It allows 12-volt relays to be operated from 6 or 9 volts, ...

This circuit works by using that principle to provide a short burst of twice the supply voltage to move the contacts and then applies the available 6 or 9 volts to the relay to lock the contacts in ...

Operation of this 2-way Motor Control circuit is simple. Both pins( 2 , 3 ) of Arduino will remain always high. When no pushbutton is pressed: In this case no current flows to the base of transistor, ...

An actual-size PCB layout for the timer kit is shown in Fig. 3 and its components layout in Fig. 4. Connect the Arduino Uno board and LCD1 as shown in the schematic diagram. Make sure that you first ...