[TriEmbed] Hacking a fake vintage radio (with Arduino + Pi 0)

Gregg Tracton tracton at gmail.com
Sun Jun 28 12:11:17 CDT 2020

That sounds like more work, errr, FUN than was needed.  ;)

I wanted to build one of those in the 90’s but the LEDs alone cost $500.


On Sun, Jun 28, 2020 at 10:41 AM Kevin McClaning via TriEmbed <
triembed at triembed.org> wrote:

> Excellent write up, Huan.
> Speaking of "silly" and "No one cares about," I once bought a scrolling
> LED sign at
> a ham fest but couldn't find documentation. I reverse-engineered the
> hardware so
> I could directly access the LED matrix with an Arduino, then set it
> about displaying
> humorous/motivational messages (of the kind you see at the bottom of
> slashdot),
> along with some random numbers and graphics.
> No, it doesn't stop there. I used the Arduino random number generator to
> select the individual
> messages to display but, I noticed that it always produced the same
> "random" order of messages.
> This annoyed me, so I added a temperature sensor and used its output to
> increase the entropy
> of the Arduino. Since I was in the "increase the entropy" neighborhood,
> I build two audio oscillators,
> with crappy stability and ran them into the AD converters of the
> Arduino. I sampled the waveforms
> every now and then and fed that into the Arduino's random seed as well.
> Yeah, "silly" but it was a fun diversion. Did all this in the
> before-the-pandemic timeframe.
> Kevin
> On 6/24/20 12:43 PM, Huan Truong via TriEmbed wrote:
> > This has taken me way more time than I thought, but finishing this
> > retrofit is a big achievement for me. It's really silly and serves
> > exactly no purpose other than RE'ing something no one cares about.  So
> > I just want to share for some shits and giggles.
> >
> >
> http://www.tnhh.net/posts/adventures-hacking-fake-vivitar-vintage-radio.html
> >
> >
> >
> >
> >
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Gregg Tracton: tired, retired & inappropriately unattired (PJ's)
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