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Member Since: July 4, 2013

Country: Canada

  • The datasheet says condensation is allowed, but I don’t know if immersion will damage the sensor (or the breakout board).

  • The datasheet says its humidity drift is typically 0.5%/year.

  • Part Through Hole?

  • What would happen if I connected an Edison and a Raspberry Pi using this? Would one or both be damaged?

  • The SX1509 breakout is back! YES! (And with mounting holes too!)

    Seriously, I was really disappointed when the previous version was retired. This is such a cool and useful chip, and SparkFun was the only company that made a breakout board for it. (One individual did make some and sell them on Tindie, IIRC, but only because they were no longer available from SparkFun.)

  • The specs in the datasheet make this sensor look less accurate/precise than the HTU21D, but this one’s datasheet seems to be trying to be more honest than usual about the accuracy of this sensor, and this one’s more expensive, suggesting better performance. So I’m not sure which one will provide better results for applications that need very accurate or precise readings. Any insight?

  • Assuming you’re using their built-in ADCs, do they have the same reference voltage? I don’t remember if the ATmega328P has configurable internal reference voltage. Even if not, maybe one of them has a bad voltage reference circuit. Maybe also try using external reference voltage via the Aref pin—though I don’t know if the LilyPad breaks that out.

  • This thermocouple sensor is more appropriate for high temperatures. Thermocouples are analog, so the accuracy and resolution depend on the thermocouple amplifier and ADC you pair it with.

  • Perhaps you forgot to #include the OneWire library?

  • Check out the ones by Carnegie Mellon students; they have an FPGA course where they have to build something useful as a final project. Hackaday often has posts about them around this time of year (which is when they’re done) and has had a few posts on them recently. There are some on Hackaday.io as well.