[R&D] Precise driving of the boiler heater #2
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stock mainboard is driving the heater by relay with very slow "bang-bang" algorithm.
if you're interested you can browse Pulse View files in state_recordings and see more in detail how stock hardware work and what hysteresis values are, etc.
i think this approach won't cut it and we need more precise temperature control!
there are dozens of PID mods for different espresso machines and i see many use these solid state relays to drive the heater.
i bought one of these:
SSR-40DA.inside i found very powerful triac (
BTA41orBTB41i don't remember) and optocoupler ic.so idk should i keep it assembled and just hook it to the new custom mainboard with wires or maybe i can just take out the components and put it on my custom PCB altogether....