Who designed the sea flea?

[copachino]

Silly thought, bad op amp?  I had some weird symptoms with some bad ones a while back.

Nope grabbed a known working pt3399 but not the tl072

did you mada it work¡???

Nope, never did. I ordered some boards, gonna try a second one.

i wanted to order it, and i was waiting you success..

[jimilee]

Well? I got 3 boards coming, so  I will let you know how it goes and we will see if it's successful or not.

[copachino]

Well? I got 3 boards coming, so  I will let you know how it goes and we will see if it's successful or not.

thanks, im build a cavedweller, but this one seems interesting

[jimilee]

Well? I got 3 boards coming, so  I will let you know how it goes and we will see if it's successful or not.

thanks, im build a cavedweller, but this one seems interesting

I've built 2 cave dwellers, what's your point? Ha! :-)

[copachino]

Well? I got 3 boards coming, so  I will let you know how it goes and we will see if it's successful or not.

thanks, im build a cavedweller, but this one seems interesting

I've built 2 cave dwellers, what's your point? Ha! :-)

non, just saying that, im interested on this delay, since this one seems more filtered, but, i nly have 5 PT chips, and not sure if they are all good

[jimilee]

I was kidding with you

[alanp]

Feel kinda guilty over this... I need a disclaimer on my osh page -- "well, worked for me..."

[jimilee]

Bwahahahaha, the circuit worked for you, so it's a good design. If the new ones work, I'm chalking it up to a bad board, we all know those happen from time to time.

[jimilee]

Ok, built a second one, all of the voltages now match my sea urchin voltages. Only getting one repeat. checked my delay cap and resistor, and all of the other cap values, I'm stumped again. Turns out the pt2399 was locking up, s I got that fixed. Tried about 3 different 2399 chips.

[alanp]

The extra repeats (beyond the first one) come from feeding the output of the delay back into it, through the fdbk pot and (on the flea) R13 and C11. They're the only thing I can think of. Cold solders?

[jimilee]

The extra repeats (beyond the first one) come from feeding the output of the delay back into it, through the fdbk pot and (on the flea) R13 and C11. They're the only thing I can think of. Cold solders?

Re flowed everything. Bad feedback pot maybe?

[alanp]

Could be, I'd test with the good old DMM across pins 1 and 2, then 2 and 3.

I have HUUUUUGE respect for Brian, Rej, Jacob, and all the other board suppliers when threads like these happen... would like to just quietly hide at times!

[jimilee]

Could be, I'd test with the good old DMM across pins 1 and 2, then 2 and 3.

I have HUUUUUGE respect for Brian, Rej, Jacob, and all the other board suppliers when threads like these happen... would like to just quietly hide at times!

It is nerve wracking for sure. The hardest debugs are when you have a bad part hidden somewhere.

[flanagan0718]

Not to thread jack but I am currently trying to redesign a circuit and it is turning out to be a NIGHTMARE. I feel your pain Allen. Good luck with the build Jimi.

[blearyeyes]

YOU WILL PREVAIL!