OverviewThe system consists of a computer that controls the central heating system and several other circuits, used for switching lights on and off, controlling a semi Whole House Ventilation System. The computer also has inputs, these monitor room, and outside temperatures, humidity, extraction fan speed in addition outside light levels are monitored, there is spare capacity to add other devices. A WiFi connection allows me to control the system remotely. |
Analog Outputs:Heat Exchanger Fresh Air Fan Speed
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Relay Outputs: Garden Lights
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Analog Inputs:Lounge Temperature
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Details
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The Interface Unit |
Screen Shot of main page |
Circuit Details: Digital Outputs |
Circuit Details: Analog Inputs |
Android Home Control Remote APP, connected via WiFi
Windows Home Control Remote APP, connected via WiFi
HistoryMy original plan was to use an old Atari 400 to control the central heating as I could not find a commercial product that could handle the four week shift pattern I was working at the time. The Atari seemed an ideal machine, it has 8 analog inputs, it is small and it has no fan, Unfortunately one of the disk drives failed while writing the software and memory was starting to get tight so I decide to use an Amiga 500 instead. The software was written in Amos Basic and the system ran faultlessly for three years. The big problem with the Amiga was there is no easy way of getting proper analog inputs, the analog joystick inputs do not like long cable lengths and you only have four inputs. In 1997 I decided to replace the Amiga with a PC built from bits and pieces I had in the loft. |
*Latest
Linpicco (IST) Analogue humidity module http://cpc.farnell.com Humidity Sensor