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Old Jan 31, 2013, 09:48 AM
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Stick banger
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USA, AZ, Chandler
Joined Oct 2004
1,031 Posts
I'm using the Locosys LS20031, it's a MediaTek MT3329-based setup. It's not the cheapest ($50 at polulu.com), but it works well with the OSD. It's 3.3V, so you either have to change the settings external to the OSD (I used my PC with a usb->serial adapter) or have a logic level converter so that you don't write to the GPS serial channel at 5V. It's very sensitive, I get good lock inside my house, and it has a battery backup to keep the ephemeris for quicker acquisition. It's slightly power hungry, but I think most GPS chips are during acquisition.
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