cool reverb apart from switch spdt 'pop' issue

[R O Tiree]

The solder mask is a bit of a faff to do, and time-consuming, I guess, not least because you actually have to cook it for an hour to do the final cure of the resin, but you definitely save time and effort on the soldering phase, fer sure. Sorry once again about the screw-ups.

[deadastronaut]

stop kicking yourself, its fine....

sounds like a bit of a lengthy process doing the pcb then...but great results..

may have this built by tomorrow!!.finished the box .whoohooo...

[deadastronaut]

''ohhhhhhhhhhhh my god, its a FLYING SAUCER'' ...........(theremin sounds)>.....whooohoooooeeeeeeooooooohhhoooooowweeeeeehooooo......







reverb.

Middle led is white (always on)

Outer leds blue on/off

text could have done with being larger to get a better etch....but hey this is mine anyway....love it.

[bluebunny]

Nice one, Rob.  This is also on my list of must-do builds.  Any gut shots?  Love to see how you squeeze a board and a brick in that enclosure.

[R O Tiree]

Lovin' it, Rob - particularly the retro-UFOs.

Purdy

[deadastronaut]

cheers guys, yeah its the old 'George Adamski ufo...i have the book ''the flying saucers have landed''  so it seemed apt really, plus it goes well with my ufo delay too..

gut shot in a bit...

[deadastronaut]

yes 2 pots are backwards. ..i'll sort that..




i slid a piece of clear plastic between the pots/pcb, this is just before i finished it off and straightened it up...

the backplate with foam holds everything firmly in place, i had to snip the bricks pins back, but now with the revised version it should be a doddle to build...



special thanks the R.O.Tree (mike) for his great work on the pcb/layout, brilliant man.

[bluebunny]

Didn't get past 0:33.  Brilliant video.  

yes 2 pots are backwards. ..i'll sort that..

It's allowed.  For a lefty.  

Edit: BTW, is that a bit of reflect-o-porn going on in the bottom of the pedal??   

[deadastronaut]

reflecto porn?

[Jdansti]

reflecto porn?

[deadastronaut]

lol, stunning resemblance...

[quad]

It sounds and looks great, deadastronaut.

Time to get the brick.

[deadastronaut]

looking good quad...


haven't you got a small to92 voltage reg?...might be a problem getting it in a 1590b..

[quad]

Good point. I might have to swap it with a small one.

[Mustachio]

I think the pinout of the larger voltage regs like you have in there are backwards to the smaller to92 versions. Not sure if you had already checked it or not, just a heads up.

[quad]

Thanks, I'll keep an eye on those pins.

[quad]

What is the function of this diode?

[armdnrdy]

It protects the regulator against input short circuit.

[Jdansti]

+1

More specifically, the purpose of protection diodes on a regulator circuit are to prevent damage to the regulator should one of the regulator's associated caps discharge back through the regulator during an input or output short.



http://www.onsemi.com/pub_link/Collateral/LM350-D.PDF

[R O Tiree]

There was a thread about this diode a while ago... It's there to protect the 7805 at power-down, or if the main circuit's V+ gets somehow shorted to GND. If the voltage at pin 3 ends up appreciably higher than that at pin 1 then the 7805 can be fried. With the diode in place, the charge in C4 can be dumped to the input side very fast and the 7805 is safe.

The thread I'm thinking of was about a PT2399 circuit and the OP had observed that he kept having to replace this regulator and the advice from the "old and bold" was that this diode was seen far more often years ago, but seems to have been forgotten about, even though you'll still see it in app notes and datasheets... but who reads them anyway? Just copy a circuit fragment, sure it'll work...

Oops, jdansiti beat me to it