Analog break out problem.

[EricVanWyk]

Originally Posted by Al Skierkiewicz

Gary,
If as I suspect the 22 ufd cap, C10 is missing, then the regulator can and likely will oscillate.

I agree.

Originally Posted by Al Skierkiewicz

The reason I am concerned is that adding caps to anything except motor leads is not allowed in the rules. Repairs to electrical components are allowed so I would want you to get this right so you have no problems in inspection in a few weeks.

My understanding of the rules differs from yours on this point. I believe the added capacitor would fall under the "custom electronics" category and therefore be legal (R62). R63 explicitly allows the motor filter caps because custom electronics are explicitly illegal on the power-path.


Gdeaver -

This is going to sound weird, but be sure to use a crappy capacitor for this. Using a high quality, low-ESR cap can make this specific power supply either squeal or throb.