Quantity=(5 colors 20 pairs)
Size=12mm x 12mm x 7.3mm
This is a standard buzzer. It will beep when powered up. If you want a buzzer that can generate tones, you need to get a piezo buzzer.
keyestudio USB Host v1.5 shield is an add-on board for Arduino USB Host. Directly plug it onto an Arduino board and it will allow the Arduino to have a USB Host function. The Arduino with host function can communicate with a USB device, such as USB flash disk, keyboards, mouse/mice, joysticks, digital camera, etc
a resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, divide voltages, bias active elements, and terminate transmission lines, among other uses.
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