Who designed the sea flea?

[jimilee]

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.

[flanagan0718]

I believe it was AlanP. It's based on the DBD

[jimilee]

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.

[flanagan0718]

Here is the link (it was Alan)
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.

[jimilee]

I flipped it even though it matched the silkscreen, no dice.

[alanp]

The part numbering doesn't match up between the Sea Urchin and Sea Flea.

[jimilee]

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

[jimilee]

Parts match up to the bom, I'm at a loss.

[flanagan0718]

Junk PT2399 maybe? The polarities on the ele caps right?


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[jimilee]

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.

[alanp]

Schematic attached

[jimilee]

So R7 is the ony resistor that would affect the regulator?

[alanp]

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.

[jimilee]

That's what I was thinking, bit I was hopping I was wrong. This one has me stumped.

[lincolnic]

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...