Author Topic: Bluetooth module (Read 3754 times)

gunni · « **on:** July 18, 2015, 10:46:56 pm »

mads b (dk) · « **Reply #1 on:** July 19, 2015, 09:32:58 am »

What is your power source?

gunni · « **Reply #2 on:** July 19, 2015, 11:00:39 am »

It would be the same 12v as the ECU, this very often drops upon startup.

mads b (dk) · « **Reply #3 on:** July 19, 2015, 11:47:16 am »

Ok a 12->5volt power supply connected to the same power source as ecu and switch by ignition key ?

gunni · « **Reply #4 on:** July 19, 2015, 04:36:58 pm »

yes, the ecu might well turn off, but the bluetooth takes quite a while to come back on, so a capacitor that can hold it for maybe 1-2sec

mads b (dk) · « **Reply #5 on:** July 22, 2015, 08:16:58 am »

If you measure the current draw on the 5volt side, then it should be possible to calculate the size needed for 2-3 sec backup power

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