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hardware power layout

 
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jjude
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hardware power layout
PostPosted: Tue Sep 12, 2006 5:04 am     Reply with quote
Sorry my bad english!
I need good layout in powerline whit car/boat power.
I regulated 12 volt DC -> 5V DC 7805-regulator, but
when i need "run" my boat DC-motor (viper or waterpump)
my PIC-system "tilt" then i must reset PIC-system.
Can enybody help me?
rnielsen



Joined: 23 Sep 2003
Posts: 852
Location: Utah

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PostPosted: Tue Sep 12, 2006 9:43 am     Reply with quote
Sounds like you might need an inductive/capacitive filter for your power going to the PIC circuit. Also, make sure you have filter capacitors next to each IC in your circuit to help with noise and spikes.
kender



Joined: 09 Aug 2004
Posts: 768
Location: Silicon Valley

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PostPosted: Tue Sep 12, 2006 11:28 am     Reply with quote
In addition to what RNielsen said, make sure that you have catch diodes for the motors.
If you need to solve the conductive noise problems in the most generic way, galvanically isolate the PIC from the high-noise environments of the motors.
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