Hey all,
So I'm putting together this circuit to test a prototype board and I'm unsure if connecting the grounds on each side of an isolated DC/DC converter is a bad idea. So here is a brief explanation of my circuit:
1. I will be powering this device from a 12V supply
2. The rotary encoder has to be isolated from the mcu which is powered with 3.3V
3. The 2 signals coming out of the rotary encoder need to be level shifted from 5V to 3.3V which are in turn pulled high to 3.3V via R1 and R2
My problem involves the jumper I have connecting the grounds below U3, Will shorting the grounds negatively affect my circuit? I feel like I need it since the signals coming out of U4 and U5 won't have a proper reference.
[Mod Note: please don't use pdf files to upload a basic image]
So I'm putting together this circuit to test a prototype board and I'm unsure if connecting the grounds on each side of an isolated DC/DC converter is a bad idea. So here is a brief explanation of my circuit:
1. I will be powering this device from a 12V supply
2. The rotary encoder has to be isolated from the mcu which is powered with 3.3V
3. The 2 signals coming out of the rotary encoder need to be level shifted from 5V to 3.3V which are in turn pulled high to 3.3V via R1 and R2
My problem involves the jumper I have connecting the grounds below U3, Will shorting the grounds negatively affect my circuit? I feel like I need it since the signals coming out of U4 and U5 won't have a proper reference.
[Mod Note: please don't use pdf files to upload a basic image]
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