A NEW (IMPROVED) VERSION OF THE YUSYNTH ADSR

[questionable]

Thanks, Yves, for the nice redesign. I've just etched 3 boards this morning and will be building them shortly.

[furio]

Thanks Yves!

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[yusynth]

Excellent

[iopop3]

Started on my ADSR boards last weekend, noticed a tiny error in the bom.

The number of 1N4148s should be 5 not 4. D5 is missing.

Also the D5 configuration is quite interesting, whats the purpose? I can think of a few reasons, but none of them feels right.

[HexInverter]

Just built a dual one of these in my 5U Serge-style format. Besides the usual blemishing on the panel from acid eating away irregularly, I think they turned out great. They work very well! Thanks for the excellent design, Yves

When I first built them, my LEDs were not working. I did observe correct envelope generation on my oscilloscope, though, so was confused. I did some searching and found the thread where you described that the LED and D5 were reverse biased. I swapped them around and now they work great

Here are a couple of photos!

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[El Mop]

Same Problem here.
Working envelope but not the LED.
Could not find that thread with the search function.
Do I just have to change the direction of both, the LED and the diode?
Thank you.

[HexInverter]