Also, most of the switching diodes I have seen say 4148 or 914 on them
Zener numbers are 4733 or similar. Pretty different.
--------------------------------------------
On Thu, 2/11/16, Bob Grieb bobgrieb@yahoo.com [PolySix] <PolySix@yahoogroups.com> wrote:
Subject: Re: [PolySix] Re: The Post I wanted to make....
To: PolySix@yahoogroups.com
Date: Thursday, February 11, 2016, 8:43 AM
Zener diodes are made to
break down with reverse voltage
If you put a
ten k resistor in series and then apply six volts with a
power supply in the reverse direction, it should be easy to
tell what is a 4148 and what is a zener
Assuming the zener voltage is five or less
--------------------------------------------
On Wed, 2/10/16, jw_dewdney@yahoo.com
[PolySix] <PolySix@yahoogroups.com>
wrote:
Subject: Re:
[PolySix] Re: The Post I wanted to make....
To: PolySix@yahoogroups.com
Date: Wednesday, February 10, 2016, 10:47
PM
well it's great
that
you mentioned that - I THINK I spotted
a ZENER instead of a
1N4148 at D3....
though it's a bit hard to tell them
apart... Perhaps a ZENER got into my signal diode drawer
somehow (understandable!) .. although it
didnt' make
much of a difference in the
end result... so i'm just
circuit
tracing around now - one WEIRD thing i noticed is
that the ground plane of the top of the board
is not
connected to the ground plane of the
bottom (apparently by
design?) - odd... on
the other side of the board it's
connected to CN10's +5V pin....