A logger with an opto-isolated current input, analog meter, and SD Writer
A PICAXE refurbishes a 40-year old autoranging Volt-Ohmmeter.
An interface for a sensor for Carbon Dioxide, Methane and LPG gas. It displays and transmits messages of its measurements.
A portable meter to measure DC or AC currents with ranges from 50 micro-amperes to 5 amperes
This is both an altimeter and a barometer depending on the code.
A multi-meter with digital and simulated analog output using neopixels