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Timer with LCD display which controls a relay board

Low power consumption device, supplied by a LiMn 3V button cell CR2032, with LCD custom display and 1 button, which permit to display the remaining time onto the display. Through the 433.92 MHz radio transmitter inside, it can control a 2 relay outputs board.

Uses a low cost Holtek MCU which absorbs less than 1uA in stand-by, while working as a Real Time Clock, and 6uA when it drives the LCD by itself, without any additional LCD controller.

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