Arduino Uno with LCD/Buttons shield on a breakout board. the area occupied by "ca1" shows each test combination that is tried and whether there was conductivity (1) or not (0). ca was the last attempt ...

In the early days, PNP bipolar transistors were common, but the bulk of circuits you see today use NPN transistors. As [Aaron Danner] points out, many people think PNP transistors ...

Yes, there is a chance to realize one simple non-arduino project of a forgetful plant waterer! If you are looking for this option, digital output of the module must be linked to the little circuit ...

Bread Board - x1 USB A to USB B Cable - x1 12V Power Source - Any Jumper Wires - Required Quantity Arduino DC Motor Speed Controller using MOSFET - CircuitDigram Below, you will find the circuit ...

A previous Design Idea describes a circuit that uses an astable multivibrator to drive an LED (Reference 1). The circuit in Figure 1 uses a simpler alternative approach. The circuit uses a 2N3904 NPN ...

A flip-flop is one of the most basic digital electronic circuits. It can most easily be built from just two transistors, although they can and have been built out of vacuum tubes, NAND and NOR gate… ...