[Laser] OPT101 and audio amplifier

[Zack Widup]

Flicker from fluorescent lights is twice the AC frequency of 60 Hz.

73, Zack W9SZ


On Fri, Aug 12, 2016 at 4:03 PM, Alvaro de Leon Romo <xe2at at hotmail.com>
wrote:

> Whats produce the 120hz interference ??
> XE2AT
>
> Enviado desde mi HTC de Telcel
>
> ----- Mensaje de respuesta -----
> De: "Mike Long" <mike at milisake.com>
> Para: "Free Space LASER Communications" <laser at mailman.qth.net>
> Asunto: [Laser] OPT101 and audio amplifier
> Fecha: vie., ago. 12, 2016 15:56
>
> Thanks for the confirmation Steve.  I agree, if I were using it outside of
> the demonstration then there is much more that should be done to optimize
> it. Just doing this should hopefully peak a few people's interest in the
> area.
>
> 73,
> Mike
> W6RP
>
> On Fri, Aug 12, 2016 at 3:44 PM, Steve J. Noll <sjnoll at ix.netcom.com>
> wrote:
>
> > Should work fine. I would want a blocking cap between the OPT101 and the
> > audio amp as the OPT101 will have a large DC output from ambient light.
> > Going further you could insert a filter to reduce the 60 Hz and 120 Hz
> > interference.
> >
> > 73, Steve WA6EJO
> >
> >
> >
> > On 8/12/2016 12:06 PM, Mike Long wrote:
> >
> >> I'll have a table at a local amateur radio event coming up on 8/20 here
> in
> >> Michigan where I plan to demo free space optical comms.  I've already
> got
> >> a
> >> K3PGP receiver built plus one of the power supplies/modulators built.
> I'd
> >> like to also put together some simpler setups as well (i.e. laser/LED
> >> pointed through a fan).
> >>
> >> I have some OPT101 chips laying around and was thinking of using one of
> >> them in the demo.  So my question is, is it possible to just use the
> >> output
> >> of the OPT101 to drive an audio amp to create a simple receiver?
> >>
> >> Thanks,
> >> Mike
> >> W6RP
> >>
> >>
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