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verified publisher icon vitotai

Heater power

Open looseends opened this issue 5 years ago • 5 comments

I'm using a 12v silicone pad heater with MOSFET using non inverted device. This heats the pad to 100C when heating. Is there option to set power level via pwm to 30% would be ideal.

looseends avatar Nov 14 '20 10:11 looseends

There is no such option. The latest official BrewPi seems to have one.

vitotai avatar Nov 14 '20 13:11 vitotai

Really not an expert on PWM or mosfets, but if you always want 30%, would it not be possible, or even better, to just add a suitable resistor in series with the pad? Also, I would really recommend adding a fan to this setup, if you are able to. That would spread the heat out faster, and thus limit the heat increase in the pad.

daghovland avatar Nov 15 '20 22:11 daghovland

The resistor would produce heat the same way the pad does. Actually the pad is a kind of resistor.

pedromargarido avatar Nov 16 '20 09:11 pedromargarido

At this stage I'll be feeding the output into pid heater on another esp8266.

looseends avatar Nov 17 '20 05:11 looseends

IMO, a dimmer might be a good solution.

vitotai avatar Nov 17 '20 14:11 vitotai