Optocoupler - This allows you to connect two circuits that do not share a common power supply. Internally there is a small LED that, when illuminated, causes a photoreceptor inside to close an internal switch. When you apply voltage to the + pin, the LED lights and the internal switch closes. The two outputs replace a switch in the second circuit Piezo - An electrical component that can be used to detect vibrations and create noises. Photoresistor - (also called a photocell, or light dependent resistor). A variable resistor that changes its resistance based on the amount of light that falls on its face. Male header pins :- These pins fit into female sockets, like those on a breadboard. They help make connecting things much easier. Potentiometer :- A variable resistor with three pins. Two of the pins are connected to the ends of a fixed resistor. The middle pin, or wiper, moves across the resistor, dividing it into two halves. When the external sides of the potentiometer are connec...
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