Convert a RS-485 signal from a sensor (can travel up to 1 km) to an I2C signal that a standard logger or Arduino can read.
Counter that can debounce noisy signals (e.g., from reed switches) in analog circuitry. Good for anemometers and tipping-bucket rain gauges.
High-gain current amplifier.
Variable-gain instrumentation amplifier, used by us with thermopile pyranometers.
Screw terminals to connect additional sensors to the same bus.
Connect 1 I2C connection, half-duplex RS-485 connection, or (with a design variant) full-duplex RS-485 connection to up to four connections.
Turns one connection into four connections, and 1+4 = Heptapod.
Breaks out the pins on a MaxBotix ultrasonic rangefinder into easy-connect screw terminals for the data logger and temperature correction.
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All code is licensed under the GNU GPL v3.0.