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Just what I needed, thanks Ian!

ETA: Cool beans, I checked the GPS specs and it only pulls 60mA. So, it seems I shouldn't need the heatsink after all.


Don't get too hasty there. Assuming a worst case (not really since it would be quite common) input voltage of 14V. You are dropping 9V at 60mA through a linear regulator. That is all dissipated as heat. P = V x I = 9 x 0.06 = 0.54W. Half a watt is not an insignificant amount of power. It mightn't sound like much but when it's 100% heat it is.

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Double-check to see if that 60mA includes the antenna. Most GPS use active antennas and sometimes the current consumption for the antenna is quoted separately.


I agree. If you have an active antenna, I highly doubt that 60mA includes the antenna.
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Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)