Serial Port Timer

Another project I did for iPerform Software also commissioned by Biometrics.

This device will have the same functionality as the DisplayBox when connected to a computer (laptop/netbook) running the appropriate software. It communicates over RS232 with a 9pin sub-D female connector. The entire board is incorporated into a sub-D connector housing and connects to a “Jump Mat”.
It times on- and off-events from the Jump Mat with a precision of 1/1024s and a maximum deviation of (apparently far) less than 30ppm (parts per million).

As with the DisplayBox project, no technical details or schematics of any circuits due to NDA.


A picture of 5 assembled PCBs and sub-D housings.


For more pictures check out the gallery

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