1-wire barometer

[David] put together this rather nice 1-wire barometer. An MPX4115 measures the pressure while an SMD DS2438 mounted to an 8 pin DIP socket provides the 1-wire interface. The writeup includes a nice description of the board layout and wiring, making this project accessible to just about anyone with a decent tip on their soldering iron.


  1. Dowser says:

    If you don’t have a decent tip on your soldering iron, get a pre-made TAI8570 from http://www.aagelectronica.com/aag/index.html?target=p_21.html or some other place.

  2. Dowser says:

    Since my comment regarding where you can buy this was removed, can I atleast then inform that this hack is *old* and the same guy also has a 3.0 version on his site: http://davidbray.org/onewire/baro2030.html or is it offensive?

  3. pip says:

    I see 3 “wires” there, power, and two phone lines.

  4. Al says:

    Pip: If you read the article you’d notice its for a so-called ‘1-Wire’ network, not that it uses one wire.

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