Hi i would like some extra info about this schematic
1) The :
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is the signal we take from our senders ??
This is the sender signal. If you give me more details of the actual sender, I can make any adjustment required.
2) The :
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the V+ goes there where is V+ CA3140 ?
I would use a 7809 regulator connected to the car battery via suitable fusing etc,
The +V symbol then the 9V from the 7809 output.
3) This one is a general one...
It will be wiser to use a LM 7806, 7809 to supply my senders instead of 12 v from cars battery ? so avoid false readings from dropped voltage (use hi beam at night )
thanks