I'm using solid state mosfet relays in my Trex according to Mark Huss schematic. I'm getting popping between channels.
This is due to the DC voltage present in the PI where the NFB comes in. There's about 3V there causing issues when it's switched to ground. Disconnecting the NFB from the switching scheme cures the popping since there's no DC present where the other channels are switched to ground.
How can I get rid of this problem? I need to take care of the DC issue, but I can't very well isolate it with a capacitor can I since that would prevent the PI from being grounded?
Any ideas?
This is due to the DC voltage present in the PI where the NFB comes in. There's about 3V there causing issues when it's switched to ground. Disconnecting the NFB from the switching scheme cures the popping since there's no DC present where the other channels are switched to ground.
How can I get rid of this problem? I need to take care of the DC issue, but I can't very well isolate it with a capacitor can I since that would prevent the PI from being grounded?
Any ideas?
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