Clipping Led working in reverse?

Hardware questions and issues with the FV-1

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forrestbaer
Posts: 2
Joined: Wed Aug 25, 2021 1:50 pm

Clipping Led working in reverse?

Post by forrestbaer » Wed Aug 25, 2021 2:05 pm

Hey there,

I've had a board built using the following schematic, and everything is working great, CV control, pot controls, 8 step switch, everything sounds good.. EXCEPT the clipping led which seems to come on when it should be off, and off when it should be on.. So I fire it up, and without any inputs or outputs, on any program, the LED is on.. If I feed it a too-hot signal like an 8v AC square wave the led will go out. I'm attaching the schematic, does anyone have any ideas? Appreciate all the help I can get.

This is a eurorack module (+12V/-12V) that backpacks the FV-1 breakout from electrosmith which is basically the "typical application" circuit from the FV-1 datasheet.

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frank
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Re: Clipping Led working in reverse?

Post by frank » Wed Aug 25, 2021 2:13 pm

Clip LED is backwards and should be connected to +3.3V not ground. See FV-1 datasheet schematic.
Frank Thomson
Experimental Noize

forrestbaer
Posts: 2
Joined: Wed Aug 25, 2021 1:50 pm

Re: Clipping Led working in reverse?

Post by forrestbaer » Wed Aug 25, 2021 2:17 pm

Oh wow, of course it is!

Thank you, I don't know why I assumed.. Lesson for today.. Did you check the data sheet? :oops:

Thanks again. :mrgreen:

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