Re: [N8VEM-S100:1276] LAVA-10 Zener Diode = 1N5226 (3.3v)

[Paul Birkel <pbi...@gmail.com>]

They make complete sense and are completely worthwhile; I was mainly unsure if the clamp was at 3.3v or something lower.

As carpenters put it:"measure twice, cut once"!

On Sun, Jan 6, 2013 at 12:51 PM, Andrew Lynch <LYN...@yahoo.com> wrote:

Hi Paul!  Thanks!  Yes, the 3.3VDC Zener diodes are added after the 100 ohm
resistors for 5V to 3.3V level transition.  In theory you don't need them
and adding the Zeners are kind of a "belt and suspenders" approach to level
transition.  However the LAVA-10 is one expensive component so it is worth a
the extra expense to protect it.  I'd consider them optional but a worthy
investment even if not needed.

Thanks and have a nice day!

Andrew Lynch

> -----Original Message-----
> From: n8vem...@googlegroups.com [mailto:n8vem-
> s1...@googlegroups.com] On Behalf Of Paul Birkel

> Sent: Sunday, January 06, 2013 2:50 AM
> To: n8vem...@googlegroups.com
> Subject: [N8VEM-S100:1271] LAVA-10 Zener Diode = 1N5226 (3.3v)
>

> Is it intended that 1N5226 (3.3v) Zener diodes be used for the logic-level
> shifting circuits (with the 100 ohm resistors)?
>
> -----