Have bought a car SMPS for amplifiers on eBay.
180W DC12V To Dual 32V Boost Power Supply Board For HiFi Amplifier Car Amp | eBay
Intention is to use it in a soundbox with a car lead acid battery.
As I would like to use the 12V from the battery to feed a DSP and BT board, I'm thinking of connecting the input GND of the SMPS with the output GND.
See picture with the red connection. I think the schematic is very similar to the one used for the eBay SMPS.
This way all Gnd is attached to the battery minus pole, creating a common reference point.
I can't think why it should not work .... can anyone else??
Additionally I'll use a small charger based on CN3768 and a laptop SMPS for charging the battery: 12V 3A 1-1000AH Lead-Acid Battery Dedicated Charger Module Board for UPS Car | eBay
180W DC12V To Dual 32V Boost Power Supply Board For HiFi Amplifier Car Amp | eBay
Intention is to use it in a soundbox with a car lead acid battery.
As I would like to use the 12V from the battery to feed a DSP and BT board, I'm thinking of connecting the input GND of the SMPS with the output GND.
See picture with the red connection. I think the schematic is very similar to the one used for the eBay SMPS.
This way all Gnd is attached to the battery minus pole, creating a common reference point.
I can't think why it should not work .... can anyone else??
Additionally I'll use a small charger based on CN3768 and a laptop SMPS for charging the battery: 12V 3A 1-1000AH Lead-Acid Battery Dedicated Charger Module Board for UPS Car | eBay
Attachments
Connecting the primary and secondary grounds won't do any harm. They're isolated for use in car amps (when used in a car) to eliminate ground loop problems.