bigal_scorpio
Active Member
Hi to all,
I am trying to make a circuit that runs from 12v so I obviously need a regulator. Up to now I have always used the 7805 and had no problems but this time I have to run 8 wires to separate LEDs controlled through a ULN2803 from a PIC16F628A.
The thing is that I can only get 8 core wire and I need all 8 for the LEDs so I was wondering if I could control the low side and feed the ICs and LEDs directly from 12v as in my drawing but I realised that I am not certain how the 7905 works?
Is my drawing wrong and if so can anyone put me right about how to do this?
The project is for a car so I can pick up the 12v or Gnd almost anywhere, I just need to keep the wire down to 8 core if possible as I have loads of it and not a scrap of anything above that.
Al
PS. please excuse my usual crappy drawing.
I am trying to make a circuit that runs from 12v so I obviously need a regulator. Up to now I have always used the 7805 and had no problems but this time I have to run 8 wires to separate LEDs controlled through a ULN2803 from a PIC16F628A.
The thing is that I can only get 8 core wire and I need all 8 for the LEDs so I was wondering if I could control the low side and feed the ICs and LEDs directly from 12v as in my drawing but I realised that I am not certain how the 7905 works?
Is my drawing wrong and if so can anyone put me right about how to do this?
The project is for a car so I can pick up the 12v or Gnd almost anywhere, I just need to keep the wire down to 8 core if possible as I have loads of it and not a scrap of anything above that.
Al
PS. please excuse my usual crappy drawing.
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