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BUY LM3915N-1 https://www.utsource.net/itm/p/1243850.html
Dot/Bar Display Driver
Description: The LM3915N-1 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display. Features: * Low current drain: 10mA max * Internal voltage regulator * Low ripple * Low cost * High input impedance Applications: * Battery level indicator * Audio level indicator * Power supply monitor * Temperature indicator (For reference only)