Vermes
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Assumptions:
This device was made to keep appropriate temperature. It can be useful in some animals breeding.
Construction:
The system uses optotriac and triac, so the hysteresis can be decreased to 0,5 degree Celsius, because it is important to gain very small temperature deviations. There is also a diode that indicates the operation of the controller. The controller has two modes – manual and automatic, realized using the relay. Temperature is set on base of thermometer measurement.
Attachment:
In the attachment on the original thread you can find design of the temperature controller board tracks and the mirror.
Pictures:
Link to original thread (useful attachment) – Regulator temperatury, termostat dla każdego