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TrH Meter kits are back in stock now

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TrH Meter is a DIY digital room thermometer plus hygrometer that displays temperature and relative humidity on 4 large (1 inch) seven segment LED displays which adjust their brightness level according to the surrounding illumination. It consists of a closed loop system that continuously assesses ambient light condition using an inexpensive light-dependent resistor (LDR) and uses that information to adjust the brightness of the display. An inexpensive DHT11 sensor is used to measure temperature and relative humidity. You can buy a complete TrH Meter kit with a preprogrammed PIC microcontroller from our Tindie store.

TrH meter displaying temperature in degree F

TrH meter displaying temperature in degree F

Note: New kits come with Red LED displays and Green PCB soldermask.

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