[sdiy] Vibe Circuit Design

[S Ridley]

Sometimes you get lucky - back when I was a student I did lab work with a
color-blind student.
I assembled a project around three breadboards of TTL chips.  Didn't work.
After over an hour of checking every connection, someone noticed it was
taking a lot of current - and then that he's connected the black wire to
the PSU +5v and the red wire to the 0v.  Swapped the wires over and... it
worked perfectly!

OTOH, my colleague who put a replacement PCB mains transformer into a
Lindos LA100 test set backwards was not so lucky.


Steve


On Sun, 25 Jan 2026 at 17:17, Jason Proctor <jason at redfish.net> wrote:

> I wired up the transformer in an 1176 build the wrong way. I thought
> the smell was it just warming up... well it warmed up all right.
>
>
>
> On Sun, 25 Jan 2026 at 03:33, Roman via Synth-diy
> <synth-diy at synth-diy.org> wrote:
> >
> > My most spectacular fail was exploding 8A-rated rectifier brigde wrongly
> connected to 400W transformer.
> >
> >
> > Roman
> >
> >
> >
> > ---- Użytkownik crystal via Synth-diy napisał ----
> >
> > Nice one Don. I've melted resistors, blown up chips and caps, but,
> haven't ignited an inductor...yet.
> >
> > Maybe i need to try harder? ;-}
> >
> > Adam, glad it wasn't a tube circuit!
> >
> > Richie, no doubt, pyrotechnics and all.
> >
> >
> > Crystal Chris~
> >
> >
> > On 1/23/2026 1:11 PM, rburnett at richieburnett.co.uk wrote:
> >
> > Made me chuckle, Adam.  Glad you lived to tell the tale though! :-)
> >
> > Every day is a learning day in electronics.
> >
> >
> > -Richie,
> >
> >
> > On 2026-01-23 09:39, Adam (synthDIY) wrote:
> >
> > ROFL
> > thx Don
> > we've all had those "learning" experiences, haven't we?
> >
> > Like when I absent-mindedly started soldering a board in my SH-2000 with
> the mains still on....
> >
> > A
> >
> > On 23 Jan 2026, at 18:05, Donald Tillman <don at till.com> wrote:
> >
> > Got a ways to go...
> >
> > https://x.com/beneater/status/2012988790709928305
> > <Screenshot 2026-01-23 at 12.01.54 AM.png>
> >
> >  -- Don
> > --
> > Donald Tillman, Palo Alto, California
> > https://till.com
> >
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