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bobc / bobc_hardware

Various hardware projects
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RAMPS-FD: Thermistor input protection #5

Open cefiar opened 10 years ago

cefiar commented 10 years ago

Can we implement thermistor protection, as has been implemented in RAMBo v1.2? Given that the circuitry was based on the thread that bobc/nophead & myself all participated in, I don't see any reason we can't also adopt it.

RAMBo PDF of the schematic (showing the protection circuitry in the section marked "Thermistors") can be found on github at https://github.com/ultimachine/RAMBo/blob/master/docs/images/RAMBoSchem.pdf

Note: The OVRef in that design is 4.7V (using a 4.7V zener), whereas it may need to be ~3V with a Due. This would definitely lead to a compatibility difference when trying to use the same shield on either the Due or Mega, though not one that should be too much of a problem to work around.

cefiar commented 10 years ago

Preliminary work rearranging components to make room for the extra protection circuitry completed.