typetwo

proof-of-concept low-cost USB to ANSI Type 2 Optical Probe design based on a PIC16F1459 microcontroller.

The microcontroller provides a USB CDC serial adapter interface. The transmit path exercises an infrared LED. The receive path is achieved with a reverse-biased photodiode; the PIC16F1459's internal comparator and DAC serves to provide a programmable threshold.

Lack of availability of a known-working ANSI Type 2 power meter prevented further testing.