Olin Lathrop wrote:
>> Haven't there been threads over the years that solderless breadboards
>> are evil?
>
> Of course, since there are always incompetent people that blame their=20
> tools
> instead of the real problem.  Solderless breadboards can be quite useful.
> Like any tool, they have their limitations, but those shouldn't be a issu=
e
> for most ordinary PIC circuits.  Adjacent nodes will have some capacitanc=
e
> between them, but so do parallel traces on a PC board.  Most of the times=
=20
> a
> few pF between nodes is expected and not a big deal for a well designed
> circuit.  If you have a very sensitive analog circuit where a pF or two
> matters, then you should probably be using guard rings and the like=20
> anyway.
>
> I've used these solderless breadboards many times, including for PIC
> circuits with 20MHz crystals.  I don't remember any problems due to the
> nature of the breadboards, although I thought about the characteristics=20
> when
> building the circuits.

A while back our recently hired junior engineer built a breadboard circuit=
=20
to test a MOSFET switch, and it just refused to work properly. When we put =
a=20
scope on it, we found it oscillating at around 90Mhz. So we brought in an F=
M=20
radio from the breakroom, added a 10-inch piece of wire to the drain, and=20
made the circuit into a theremin.

He later air-wired the circuit, and it worked as intended (boring).

Vitaliy=20

--=20
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