I'd like to set up a 'master switch' for my radio equipment, and I'm thinking of using a 4 pin automotive relay to do so.
Would it be wise to switch the negative side, or the positive side? I've heard of it being done in both ways. What I'm switching is the lead running from the battery to the barrier strip that distributes power to the radio, GPS, and 5v power supply.
The relay pinouts are:
86 Ground
30 Input
87 Output when relay is active
85 Positive input to trigger relay coil.
Would it be wise to switch the negative side, or the positive side? I've heard of it being done in both ways. What I'm switching is the lead running from the battery to the barrier strip that distributes power to the radio, GPS, and 5v power supply.
The relay pinouts are:
86 Ground
30 Input
87 Output when relay is active
85 Positive input to trigger relay coil.