Tag Archives: hygrometer

TrH Meter project kit is now available for preorder on Tindie

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TrH Meter is a DIY microcontroller-based indoor thermometer plus hygrometer that displays temperature (F/C) and relative humidity on 4 seven segment LED displays which adjust their brightness level according to the surrounding illumination. The displays are 1 inch big, emits bright yellow color, and are readable from more than 50 ft away. 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. The DHT11 sensor is used to measure temperature and relative humidity. The microcontroller used in this project is PIC16F688, and it runs at 4 MHz internal clock. A separate display driver chip (MAX7219) is used to control and refresh the display data on the seven segment LEDs. A 3-position slide switch controls power ON/OFF and Fahrenheit (F) or Celsius (C) scale select for temperature display. You can now preorder the project kit for a discounted price of $25 on Tindie. You will receive a preprogrammed PIC16F688 microcontroller in the kit.

TrH Meter project kit is now available for preorder on Tindie – [Link]

TrH Meter: A DIY indoor thermometer plus hygrometer with adaptive brightness

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This project is about building a microcontroller-based 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. The microcontroller used in this project is PIC16F688, and it runs at 4 MHz clock generated from its internal source. A separate display driver chip (MAX7219) is used to control and refresh the display data on the seven segment LEDs.

TrH Meter: A DIY indoor thermometer plus hygrometer with adaptive brightness – [Link]

Digital & Binary clock with thermometer & hygrometer

This project is a Digital clock that is able to show time in both a LCD display and in LED display binary output. It also has a thermometer and a hygrometer able to show relative humidity and absolutely humidity. It is build around Microchip PIC16F917, a RealTimeClock Maxim DS1305 and Sensirion SHT11.

Digital & Binary clock with thermometer & hygrometer – [Link]