Hi Bob, Can you give some more specifics? Do you have a PDF schematic? What would the cost be?
My main thing for the design I'm looking for is: 1. The same size as the UT board so they can be connected together (like the TAPR model) 2. Multiple buffered PPS outputs (TTL & RS232 levels) and possibly multiple RS232 data outputs. How do you have the PPS LED connected? Is it just tied to the line with a resistor, or did you use a NPN transistor to buffer it? Also, I realize that a plain old 5V regulator (like a LM7805) is cheap (less than .50 cents), have you considered using a more efficient switching regulator like a LM2574, which costs probably a couple bucks. The advantage is no heatsink, which could cause problems when trying to build a board to fit the same footprint as the GPS (not to mention the heat generated). If we can come to some common design / layout that would suit everyone, I know I would be in for at least 3 boards. Jason > I have built 3 prototype boards for interfacing to a Motorola GT/UT GPS and I am > about ready to order production boards. I was wondering how many users are > looking for something like this, TAPR and another source have discontinued their products. > > Presently the design has a linear voltage regulator for the 5 volts, a MAX232 > level translator and an LED for the 1PPS heartbeat. There is also room for > buffers if there is a demand for this. I was thinking of offering a kit with the > PC board and the components. Anyone interested? > > Bob Ellis, K0BGH
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