Dual pitch shifter into resonant filter

cloudscapes · Post by **cloudscapes** » Fri Sep 18, 2015 8:57 am

Welp, that didn't go as expected... onto debug tonight/weekend.

Something around my opamps/mixer is not only not working but squealing/feedbacking like crazy. Hoping I didn't fry the FV1.

One of those things where I have to investigate/prove the "why", before I know what the "what" is.

UglyCasanova · Post by **UglyCasanova** » Fri Sep 18, 2015 4:07 pm

That blows, dude. Off to the lab!

oldangelmidnight · Post by **oldangelmidnight** » Fri Sep 18, 2015 8:15 pm

Given it's the FV1, is there some latency? There always is, right?

cloudscapes · Post by **cloudscapes** » Fri Sep 18, 2015 9:27 pm

UglyCasanova wrote:That blows, dude. Off to the lab!

Yeah, it's looking like

(a) the FV1 is fried
(b) some mistake I can't figure what on the PCB fried the FV1

I have a few more tests to try it, but it's looking like I might need to start the PCB layout over and order a new one, which sucks. I've been probing everywhere the PCB and nothing makes any sense. which is a bad sign.

goroth · Post by **goroth** » Sat Sep 19, 2015 12:17 am

Did you spill beer on it?

Tristan · Post by **Tristan** » Sun Sep 20, 2015 6:13 am

Of course he did, but that didn't help either.

cloudscapes · Post by **cloudscapes** » Sun Sep 20, 2015 10:30 am

Welp, I've pretty much given up on these PCBs. Tried populating a second one but without all the analog stuff. Just the FV-1 and the minimum it needs to function. Still dead.

Thjis sucks, it should be simple. It's not exactly a complicated chip to use. The 32bit micros I use for my other stuff are in theory far touchier. Can't do any more tests as I'm out of PCBs and FV-1s (the chips are $20 a pop, too). Sucks that I could have had a working pedal this weekend, instead it's delayed at least a month.

Stuff like this seems to happen more often than it should with me. Sometimes I wonder why I even bother with diy.

Teej212 · Post by **Teej212** » Sun Sep 20, 2015 1:50 pm

youre paying 20 bucks for your spins? check experimental noize, I pay 10 for them there.

cloudscapes · Post by **cloudscapes** » Sun Sep 20, 2015 5:45 pm

Teej212 wrote:youre paying 20 bucks for your spins? check experimental noize, I pay 10 for them there.

our dollar is really shit right now. I was getting them from smallbear. $16usd = $22cdn

I've checked out expeirmental noize. I've also designed a new minimal board just for the fv-1. since that's all I can do at this point. start from something small, even though the prototype was (and still is) working perfectly.

ilovefuzz.com

Dual pitch shifter into resonant filter

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