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2-channel temperature controller.
Design files (schematics, PCB layouts, BOMs) can be found at Thermostat/Releases.
- Channel count: 2
- Sensor: 10k NTC thermistors read by AD7172-2 ADC
- Load (heater/TEC) drive: up to 8W (+/-2A with 4V compliance) from MAX1968 drivers
- Form factor: 3U module or stand-alone enclosure (Hammond 1455C1202)
- Output connectors: Sensor and load connect via terminal block connector on the stand-alone enclosure version or via internal 100mil pin-header on the 3U version (can be broken out to a separate front panel with 2xD9, such as Schroff 30849-750).
- Programming interface: Ethernet via RJ45 connector on the front panel. USB via micro USB connector on the front panel.
- Indicators 4 front panel LEDs
- Power supply: +12V DC (1.7A max) supplied either by a front-panel barrel connector, internal 100mils pin-header, or rear Molex connector (3U version only). PoE via onboard 30W Silvertel AG5300 module.
- Microprocessor: STM332F427ZI
- This version lives in the following repository: Thermostat_Thorlabs.
- Based on a Thorlabs temperature control module. The Thorlabs module has a poor tempco and can't drive resistive heaters so that approach was scrapped. See discussion (see issue #4).
- Hardware release is v2.0rc5.
- This is the version that is shipping as of 12/4/2020.
- Be aware of the following bugs.
- Do not use with with power over ethernet (POE) as this can kill be board. Issue 83
- Temperature sense pins for TEC0+/TEC0- are SENS1. Temperature sense pins for TEC1+/TEC1- are SENS0. This is not yet automatically fixed in firmware as of 12/4/2020. Issue 79
- Fan may be needed to prevent overheating. Issue 73
Enclosure is Hammond PN 1455C1202
