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Beirdo / arduino-webasto-mainboard

Custom replacement control board for Webasto Thermo Top C/E
MIT License
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Question: mosfet protection? #1

Closed olivluca closed 3 days ago

olivluca commented 4 days ago

Hello, this is just a question.

I'm trying to build an high altitude compensator for my truma combi d, but I'm not good at electronics design, so I'm looking for a driver circuit for the fuel pump and I found your design, which I don't understand (see above where I say I'm not good at electronics design :wink:)

  1. I don't understand why there is a 10 Ohm resistor going to ground in parallel to the output
  2. I see no protection against a short circuit (that's actually my main concern, I wouldn't like to find my van burnt into ashes)
  3. what's the function of the bat54sw? (edit: the lower shottky is the flywheel diode, but the upper one?)

My first idea was to use an opto+p-channel mosfet module from aliexpress, but regarding 2. above I thought about using an infineon profet part (e.g. the bsp772t), which is protected against a short circuit.

What do you think?

olivluca commented 3 days ago

I just found that the owner of this repository passed away suddenly one year ago. He was only 50 years old. I'm really sorry.