Portsdown DMM Display and Logger
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The Portsdown Digital Multimeter display and logger works with a modified Parkside PDM300 C3 multimeter (seasonally available for £11.99 from Lidl) to display and log the meter readings.
Initial proof-of-concept functionality is limited to a large display of the voltage reading. Based on user feedback, further features will be added.
Modification of the DMM
Warning - this modification relies on careful construction and an opto-isolator to keep up to 300V AC away from yourself and your Portsdown Raspberry Pi. DO NOT attempt this modification if you are not confident in your abilities