Please, help with a schematic !

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z24

New Member
hi everyone,

i came across a website that shows how to build an OBDII interface.
it uses a PIC16F84 microprocessor, so iam wondering if i want to build that circuit myself do i have to program the chip ??? the instruction arent very clear to me cuz i am not an expert in PICs and programming them so iam thinking i can just build the circuit without programming the PIC, correct me if iam wrong and show me the right way to do it .... your help is appreciated, here is the schematic and the instruction file
 

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You will have to either program the chip, or buy it preprogrammed, a blank chip does nothing.
 
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