The prototype of the shutdown controller is finish and all work perfect
It can control a current around 30 Amp.
Function
1. Tank battery automatic switch to tank battery when main power loos, this controlled by to relay
2. to control the main power to the dc-dc converter and power on and off the pc, I use a PIC controller coming from PICAXE and it only cost 2 $ and very easy to program.
I use standard car relay with homemade connector, maybe not nice but it wrok
The next step is to make the final layout with 2-3 more function where I need a bigger PIC with more I/O pin.![]()



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