[sdiy] More SBB Comments

[harrybissell]

Scott Gravenhorst wrote:

> Also, in my opinion, a theatrical light dimmer circuit is something I would
> consider a power circuit.  I would never have tried that on SBB.  Anything
> that can potentially generate more heat than I can handle on my skin for
> about 10 seconds is more than I'd want on SBB.
>

only the control circuit was on the breadboard... the power section was
on an appropriate PCB. The problem was not the application, but the
method used.

For slow digital circuits (like old TTL) in educational environment, the
SBB is probably 'ok'. I'd need to keep in mind that many 'newbies' might
screw themselves worse with soldering irons than with the breadboard.

Most of the vectorboard prototypes I have done (well... if they worked out)
are in permanent enclosures and still working after 5, 10, 20 years... try THAT
with
an SBB.

Its also good to invest in the real prototype... you can try it later and
compare to
a PCB if you like.

I had an envelope follower proto... and I picked it up later when I thought
that
I had made an error. (I'm thinking... it could not have possibly been THIS bad
when
I did it originally... ).  It wasn't... the new circuit had a damaged opamp.
The original
proto was still working well.

(again... try THAT with an SBB... it would be disassembled by now :^)

Sometimes... I take apart and recycle Vectorboard protos... if they were
totally
useless. The only downside (imho) is the cost of the pins... about $.04 each. A

two cent resistor costs eight cents to install.  otoh... if you need to change
the
value... the pins allow that with almost unlimited re-soldering capacity.  I
pull the
old one out, heat the pin and slide the x-acto knife in the slot to keep it
open.
Put in new part, resolder. After about ten times... you might need some
solderwick.

here's a thought... A BBD in an SBB  :^P

H^) harry