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Old 06-09-2008, 09:14 PM   #12 (permalink)
needs more cowbell
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One power conditioning design I did see that made a lot of sense to me was a large capacitor on the input and positive was connected to automotive power "in case the starter tries to drain the capacitor" For some reason I have a real hard time putting a voltage regulator (zener) on a voltage regulator, but a large capacitor should smooth things out and reduce/eliminate brownouts, which the atmega definately doesn't like, especially with a diode there. Thoughts? Is that a reasonable compromise between DIY "good enough" and "clean room" mentality and complexity? Which would also add a fair degree of reliability to the power supply at the same time?

edit: updated schematic/board in post 9. Also note futurelec sems to have very reasonable prices for no-frills prototype boards, especially single sided. Any others? I have zero experience here.

Also what about buttons? I wind up custom fabbing them to keep the front profile to a minimum, but what are the options there? Also I like pressing down on them since it doen't test the strength of my velcro so much.

Last edited by dcb; 06-09-2008 at 09:56 PM..
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