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All channels flash quickly when powering up board


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When I power up in my 8 channel board, everything plugged into that board gets a quick flash. (All eight circuits get power for about .3 seconds, then they turn off and the board operates as expected.) Is this normal? Does it indicate a problem? My other boards do not do this, only one 8 channel one.

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contactmike1 wrote:

When I power up in my 8 channel board, everything plugged into that board gets a quick flash. (All eight circuits get power for about .3 seconds, then they turn off and the board operates as expected.) Is this normal? Does it indicate a problem? My other boards do not do this, only one 8 channel one.

Some of my 16 channel (dual power) do this as well. I'm 90% sure it has to do with the order you plug them in.

Being an 8 channel ... *shrug*
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I see this with my MP3 16 channel controller also, not every time though.

Seems to me that energy is getting through to the triac outputs before the microprocessor can boottrap itself out of reset mode, and start its internal houskeeping and then turning off the outputs.

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