I am installing a Sirius radio into an antique car with a 6 volt negative ground system. I have a Pololu D24V22F5 step down regulator to reduce the voltage into the Sirius receiver to the required 5 volts. This may be a stupid question regarding connections…
The 6 volt positive goes to "Vin"
The 5 volts to Sirius goes to "Vout"
Where do the negative connections from the 6 volt system and to the Sirius receiver go?.. to the ground terminal between “Vin” and “Vout” on the regulator? To the other ground terminal in the corner of the regulator? One on each? Which to which? Does it matter?
Thanks for any help.