Temperature Interface

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Revision as of 12:16, 23 March 2012 by Tom (talk | contribs) (Related projects)

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This is the documentation page for the SPI_LM35 board.


Assembly instructions

Possible Configurations

Option 1: cheap, simple, positive only LM35.

  • Install solder jumper
  • don't install diode, capacitor, resistors.

Option 2: LM35 with negative temperatures.

  • install diode,
  • install pullup resistor? 50k
  • install pulldown resistor 15k.
  • Optional capacitor 100n.
  • do not install solder jumper.

Option 3: thermocouple.

  • install diode,
  • install pullup.
  • do not install pulldown.
  • do not install solder jumper.

Diodes: PNB7000 or BAS31S or BAV99. should all work. Others should work too. The idea is that at 0.1mA forward current the voltage drop is about 1V.

External resources


Additional software

Related projects



Jumper settings


The software

Default operation

Future hardware enhancements

Future software enhancements



  • Initial public release