[time-nuts] RS232 / GPS interface/prototyping board
holrum at hotmail.com
Mon Jun 13 20:53:10 EDT 2016
I have put my RS232 adapter board for GPS modules up on OSHPARK's shared projects page.
It has connectors and holes for the Adafruit Ultimate GPS, Trimble Resolution T timing receivers, and generic (Vcc/Gnd/Tx/Rx) devices (like the popular Ublox NEO-6M based Crius CN06). The 1PPS signal is routed to the RS-232 connector via the MAX232A, polarity is selectable. There is a small prototyping area including an 8-pin DIP for a ATTINY CPU, etc. GPS/MAX232A power can come from an on-board regulator or the DC IN jack.
Note: use a MAX232A chip with 0.47uF caps, not the CP3232 marked on the silkscreen... CP3232's are way too picky about their caps.
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