My regulator is getting warm, and I got no delay. I have resoldered, I have run a blade through every joint, verified all the caps are in the right spots. I'm stumped, I tried another regulator, does the same thing. Is there a part that has gone bad? Is there a schematic? I took a solder side picture, I'll take more this evening.
(http://img.tapatalk.com/d/14/09/03/e6ygyta4.jpg)
I believe it was AlanP. It's based on the DBD
Quote from: flanagan0718 on September 02, 2014, 07:29:46 PM
I believe it was AlanP. It's based on the DBD
I believe you're right. It was based on the dbd, just 1590a style.
Here is the link (it was Alan)
https://oshpark.com/profiles/alanp (https://oshpark.com/profiles/alanp)
Seems like a dumb question, especially someone with your experience, but is the pin out on your regulator the same? I had this happen on a Rebote 2.5 I built a little while ago and I think the solve was I flipped it 180 degrees.
I flipped it even though it matched the silkscreen, no dice.
The part numbering doesn't match up between the Sea Urchin and Sea Flea.
Quote from: alanp on September 02, 2014, 07:54:36 PM
The part numbering doesn't match up between the Sea Urchin and Sea Flea.
I'll check what I have when I get home. I hope that's it, otherwise finding "the" bad part is a pita
Parts match up to the bom, I'm at a loss.
(http://img.tapatalk.com/d/14/09/03/vu6y8yby.jpg)
Junk PT2399 maybe? The polarities on the ele caps right?
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Quote from: flanagan0718 on September 03, 2014, 12:21:15 AM
Junk PT2399 maybe? The polarities on the ele caps right?
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Polarities are good, damned resistors are so small, I can't really read them but just comparing them to what I can see, they're right.
Schematic attached
So R7 is the ony resistor that would affect the regulator?
No, R7 and R8 provide Vbias, the regulator is directly attached to 9V and puts out 5V on the VD net which is directly connected to the PT2399.
That's what I was thinking, bit I was hopping I was wrong. This one has me stumped.
Check the voltages on your regulator and make sure they're what you should be getting. Off the top of my head I think you should be seeing 5V at pin 1 of the PT2399 if that's an easier spot to measure...
Quote from: lincolnic on September 03, 2014, 03:01:20 AM
Check the voltages on your regulator and make sure they're what you should be getting. Off the top of my head I think you should be seeing 5V at pin 1 of the PT2399 if that's an easier spot to measure...
That's all good, that was my thought too. The only other thing I can think of is I used a little extra flux on some if the ground connections, they seemed a bit stubborn. It's not unheard of for flux to cause issues.
I have audio, just no delay and a hot regulator.
Tried a different PT2399?
Quote from: alanp on September 03, 2014, 03:29:12 AM
Tried a different PT2399?
yep, I may need to try a few more I suppose maybe?
Pin voltages. I'm using a battery so VB+ is 8.1
i-4.9
2-2.3
3-0
4-4.9
5-4.9
6-2.3
7-0
8-4.5
9-4.6
10-.6
11-2.3
12-2.3
13-2.3
14-2.3
15-2.3
16-2.3
Anything seem amiss?
Could it possibly be a bad board at this point? What else could I do / check?
The IC voltages should be the same as a Sea Urchin build
On the sea urchin, pin 4 is 0 and 9 and 10 are 2.4
I got 2 on pin 4 and 4.6 on pin 9 and .6 on pin 10.
An audio probe shows I have audio out on 15, but no audio in on 16?
What did I do wrong?
If you have voltage on pin 4 and pin 9, maybe you have something shorting to ground somewhere?
Quote from: lincolnic on September 04, 2014, 10:27:07 PM
If you have voltage on pin 4 and pin 9, maybe you have something shorting to ground somewhere?
I'll agree with you there, but I don't see a single solder bridge anywhere and it's making me nuts.
I hear you, it's frustrating. Maybe put on a good record and break out the multimeter to see if anything has ground continuity that shouldn't have it.
Quote from: lincolnic on September 05, 2014, 04:46:40 AM
I hear you, it's frustrating. Maybe put on a good record and break out the multimeter to see if anything has ground continuity that shouldn't have it.
Great idea, that's next.
Silly thought, bad op amp? I had some weird symptoms with some bad ones a while back.
Quote from: wgc on September 05, 2014, 12:28:43 PM
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
Quote from: jimilee on September 05, 2014, 12:51:25 PM
Quote from: wgc on September 05, 2014, 12:28:43 PM
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¡???
Quote from: copachino on September 16, 2014, 03:25:38 PM
Quote from: jimilee on September 05, 2014, 12:51:25 PM
Quote from: wgc on September 05, 2014, 12:28:43 PM
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.
Quote from: jimilee on September 16, 2014, 03:26:46 PM
Quote from: copachino on September 16, 2014, 03:25:38 PM
Quote from: jimilee on September 05, 2014, 12:51:25 PM
Quote from: wgc on September 05, 2014, 12:28:43 PM
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..
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.
Quote from: jimilee on September 16, 2014, 05:14:00 PM
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
Quote from: copachino on September 16, 2014, 07:30:33 PM
Quote from: jimilee on September 16, 2014, 05:14:00 PM
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! :-)
Quote from: jimilee on September 16, 2014, 07:31:39 PM
Quote from: copachino on September 16, 2014, 07:30:33 PM
Quote from: jimilee on September 16, 2014, 05:14:00 PM
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
I was kidding with you
Feel kinda guilty over this... I need a disclaimer on my osh page -- "well, worked for me..." :( :(
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.
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.
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?
Quote from: alanp on October 02, 2014, 02:20:18 AM
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?
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!
Quote from: alanp on October 02, 2014, 02:30:04 AM
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.
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.
YOU WILL PREVAIL!
I had to cut between two traces that were shorted on one of beans production boards.
Somehow the 18v trace was touching the 9v input pad.
Took a lot of patience which is in short supply these days.
Been did a production dress urchin? Does said modification apply here?
No I was just sayin bad boards happen.
Quote from: blearyeyes on October 05, 2014, 07:36:22 AM
No I was just sayin bad boards happen.
Oh yeah, it happens for sure.
Do you think bad electros would cause this?
Just noticed a missing trace -- connect the south end of C22 (the non ground end) to the R12 pad directly below it. I feel so stupid. Don't know if this is your problem -- check continuity between those 2 pads first before you join 'em.
ok now i need to go check out my seaflea about this because two days ago it was working just fine.
Quote from: alanp on October 08, 2014, 03:06:06 AM
Just noticed a missing trace -- connect the south end of C22 (the non ground end) to the R12 pad directly below it. I feel so stupid. Don't know if this is your problem -- check continuity between those 2 pads first before you join 'em.
got continuity there, no worries. Where can I start the audio probe to see if it's even doing what it's supposed to before it goes to the delay pot?
Quote from: muddyfox on October 08, 2014, 06:44:08 AM
ok now i need to go check out my seaflea about this because two days ago it was working just fine.
Ok, I have another unpopulated seaflea and c22 and r12 are connected, as are ones on my populated board.