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Github Link (Breakout): https://github.com/lhr-solar/DataAcq-EnvBreakoutPCB
BOM Link: WIPhttps://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=8fef7b51e5
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Moving to breakout implementation - WIP |
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Description: Digital relative humidity and temperature sensor
Justification for selection of specific part: ?? DataAcq chose it
Datasheet link: https://sensirion.com/media/documents/33FD6951/662A593A/HT_DS_Datasheet_SHT4x.pdf
Associated passives/components:
100nF capacitor
2x 10k resistors
Interface: I2C
Footprint: weird footprintNon-standard QFN
Breakout: https://www.adafruit.com/product/5665
Should work for driver development/testing
Notes:
3.3v supply voltage
Maximal power-up time = 1ms
Also measures temperature – not using this functionality due to modular nature of board
Heater functionality provided for high humidity (>90%RH) conditions
Accurate to ±1.0 %RH
Airflow Sensor – FS3000
Description: Air velocity sensor module with 12-bit digital output
Justification for selection of specific part: ?? DataAcq chose it
Datasheet link: https://www.mouser.com/datasheet/2/698/REN_FS3000_DST_20230207-3075780.pdf
Associated passives/components:
3x 0.1uF capacitors
1uF capacitor
Interface: I2C
Footprint: also a weird oneNon-standard QFN
Breakout: https://www.sparkfun.com/products/18768
Possible choice but expensive so maybe find an alternative?
Notes:
3.3v supply voltage
Temperature Sensor – https://www.ti.com/product/LMT87
Description: Analog temperature sensor with Class-AB output
Justification for selection of specific part: ??DataAcq chose it
Datasheet link: https://www.ti.com/lit/ds/symlink/lmt87.pdf?ts=1728144032765&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLMT87
Associated passives/components:
0.01uF capacitor connected between Pin 4 (VDD) and GND, other
Other VDD pins connect to power PWR plane
Interface:
Analog - output voltage is inversely proportional to temperature as shown below
Footprint: SOT(5)
Notes:
2.7v to 5.5v supply voltage
0.7ms power-on time
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