I really enjoyed this. A short film about someone who built a transmitter in his grandmother’s back garden to transmit music to other lifeforms in outer space.
After looking into designing a holder for the new smaller amps I am using for the sound output, I have now decided to incorporate this into the PCB itself. Not soldered the headers on, but this should mean everything is now secure inside the ‘Rock’ shells, but also detachable if anything needs maintenance / replacement.
So, almost there now with the first fully-working prototype of the 4 Space Rocks and transmitters (once I get to sit down and solder the headers, that is).
Looking at how to fit the new (improved) mini amps into the Space Rock shells.
Finally back working on the Space Rocks prototype. A note to self regarding wiring of the new mini amps I am awaiting delivery of .
*Just in case I don’t come back to this for a while again. Amazing how much you forget if you stop and start working on a project over a long period. Is all coming back to me now though.
Random photos from a session soldering the 4 x speakers for the first Space Rocks prototype.
The components for the second two Space Rocks needed to take up less space. In the case of Undarum, the amplifier was too large. Shown here is the circuit on a new PCB (version 3) using an Adafruit Mono 2.5W Class D Audio Amplifier (PAM8302), which has a much smaller footprint and height than the previous self-assembly amplifier kit I was using.
Space Rock innards on new PCBs. Working. Video.
Finally soldered the printed circuit boards ordered a while ago.
First Space Rock circuit and PCB
A fascinating deconstruction of the audio contents of the Voyager Golden Record on the Twenty Thousand Hertz podcast.