This controller uses the Sensirion SHT11 combined
temperature and humidity sensor.
Measurement and Display:
|Scale selectable between Centigrade and Fahrenheit|
Humidity 0 - 100% temperature compensated
Temperature -40 to 123° C (-40 to- 254° F)
Up to 3 DC switched outputs 10A or
2 DC outputs, 1 AC switched output (Max 4A)
Small room temp/humidity
From clockwise top - DC board,
Controller board, rotary encoder, SHT11 sensor
and AC board.
Note the pcb in the
photo for the controller board is not
the same as the final version available to
order, or in the pcb download files. The DC
board has been amended to include the reservoir
capacitor on the board.
here for the project
text and diagrams.
For stockists of the sensor
see bottom of page.
The complete project file
including the 'C' source code, hex file, parts
list, schematic and PCB files in Eagle format
can be found in the downloads
A preprogrammed PIC can be
purchased for £5.00 inc P&P to most
countries. The 3 PC boards are available either
separately or as a bundle. Email firstname.lastname@example.org for prices.