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...W thermostat with sensor author bart meijer nd date of august document version reprapworld com product overview small pcb to stand alone control your heated bed up a comes k thermistor three tactile button allow you the board specifications temperature range c resolution or controllable accuracy refresh seconds input voltage v max current power history creation corrected drawing added extra relais installation review following image for wiring schema be sure get polarization correct heater doesn t matter can use different section as long draw more than alternately an relay switch higher currents...