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Acoustic Coupler Modem prototype inside Conveyer Belt Computer prototype rig Early GermPro prototype Five generations of Sinar Moisture Meters Sinar Moisture Meter surface mount

Early GermPro prototype

Early GermPro prototype

A PCB created using Ranger2 PCB software, running on MSDOS. A step up from tape and lightbox, but not as good as the Proteus system that I use now.