Temperature Interface

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This is the documentation page for the SPI_temp and I2C_temp boards.

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.

Additional software

Related projects

• Temperature_control

Protocol

For the intro to the SPI and I2C protocols read: SPI versus I2C protocols

The board specific protocol can be found here: DIO_protocol

You should also read the General_SPI_protocol notes.
For arduino, a sample PDE is available, called ardemo_lcd.pde, also at BitWizard software download directory .

This is a demo to send things using SPI to the lcd board. The SPI routines there are applicable for the DIO, 3FETS and 7FETS boards as well.

Changelog

1.0

• Initial public release