Reference sheet for the L7812, a fixed positive 12 V linear voltage regulator from the STMicroelectronics L78 family, supplied as a 228 KB PDF. It shows the input, ground and output pin order for each package, dropout voltage, maximum input and the typical application circuit with its bypass capacitors. Technicians use it when checking a dead supply in monitors, power boards or other equipment. Confirm the input voltage is present and the output reads close to 12 V under load before condemning the part.
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