4 ms·

Mind Grenade (2019)

90 points by ggoo 5y ago

4gotunameagain 5y ago
That's super cool, does anyone know where to find the schematic? Creating one from the simulator code would do it, but he states that it is an "an abstracted version of the Mind Grenade" so not sure if that means not exactly the original design
- smoyer 5y ago
  74LSxx parts are still available and will provide all the logical functions described. An LM555 could able used as the astable multi vibrator.
  - 4gotunameagain 5y ago
    Yeah I too did read the article, thank you. I know how to make a functionally equivalent device from the provided information. I trust that the original inventor tried multiple variations before settling on the final design, and was hoping to be able to skip that
- Animats 5y ago
  Much the same circuit is inside each flickering-candle LED.[1] [1] https://hackaday.com/2013/12/16/reverse-engineering-a-candle-flicker-led/ https://hackaday.com/2013/12/16/reverse-engineering-a-candle...
deleted 5y ago
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B1FF_PSUVM 5y ago
> my wire-wrapped electronics works perfectly fifty years later Good point there. I once had to debug a (just-made) bad wrap that looked OK but wasn't, and that was it for my troubles with wire-wrap.
YZF 5y ago
Neat. Just a random thought about the random notes is that picking notes from chords over some chord progression might result in more interesting random music. You'd probably need some sort of ROM lookup table to accomplish this in the original design. You can still randomize which specific notes are being played out of the chord (or the scale implied by the chord?)
- jancsika 5y ago
  Somewhat related-- IIRC, the game Spore apparently featured a harmonization algo that implemented some of the rules of counterpoint from Fuch's Gradus ad Parnassum. It's like an autotune for 250-year olds.
  - Mossly 5y ago
    Having recently read gradus for the first time, I'm excited to hear that strict counterpoint has been implemented in this way. "The development of the procedural music system was undertaken by Kent Jolly and Aaron McLeran with Brian Eno acting as consultant... A melody generator is included that is based on Markov models. A further routine implements a simplified counterpoint based on Johann Joseph Fux’s treatise Gradus ad Parnassum." ADAPTIVE GAME SCORING WITH AMBIENT MUSIC by Axel Berndt https://search.informit.org/doi/pdf/10.3316/informit.693226767506659?download=false https://search.informit.org/doi/pdf/10.3316/informit.6932267...
fit2rule 5y ago
A neat device! The modern equivalent would be the Monome Norns: http://monome.org/norns/ http://monome.org/norns/ Or a Crackle Box: https://en.wikipedia.org/wiki/Kraakdoos https://en.wikipedia.org/wiki/Kraakdoos

Mind Grenade (2019)

90 points by ggoo 5y ago

That's super cool, does anyone know where to find the schematic? Creating one from the simulator code would do it, but he states that it is an "an abstracted version of the Mind Grenade" so not sure if that means not exactly the original design

smoyer 5y ago
74LSxx parts are still available and will provide all the logical functions described. An LM555 could able used as the astable multi vibrator.
- 4gotunameagain 5y ago
  Yeah I too did read the article, thank you. I know how to make a functionally equivalent device from the provided information. I trust that the original inventor tried multiple variations before settling on the final design, and was hoping to be able to skip that
Animats 5y ago
Much the same circuit is inside each flickering-candle LED.[1] [1] https://hackaday.com/2013/12/16/reverse-engineering-a-candle-flicker-led/ https://hackaday.com/2013/12/16/reverse-engineering-a-candle...

deleted 5y ago

[deleted]

B1FF_PSUVM 5y ago

> my wire-wrapped electronics works perfectly fifty years later Good point there. I once had to debug a (just-made) bad wrap that looked OK but wasn't, and that was it for my troubles with wire-wrap.

YZF 5y ago

Neat. Just a random thought about the random notes is that picking notes from chords over some chord progression might result in more interesting random music. You'd probably need some sort of ROM lookup table to accomplish this in the original design. You can still randomize which specific notes are being played out of the chord (or the scale implied by the chord?)

jancsika 5y ago
Somewhat related-- IIRC, the game Spore apparently featured a harmonization algo that implemented some of the rules of counterpoint from Fuch's Gradus ad Parnassum. It's like an autotune for 250-year olds.
- Mossly 5y ago
  Having recently read gradus for the first time, I'm excited to hear that strict counterpoint has been implemented in this way. "The development of the procedural music system was undertaken by Kent Jolly and Aaron McLeran with Brian Eno acting as consultant... A melody generator is included that is based on Markov models. A further routine implements a simplified counterpoint based on Johann Joseph Fux’s treatise Gradus ad Parnassum." ADAPTIVE GAME SCORING WITH AMBIENT MUSIC by Axel Berndt https://search.informit.org/doi/pdf/10.3316/informit.693226767506659?download=false https://search.informit.org/doi/pdf/10.3316/informit.6932267...

fit2rule 5y ago

A neat device! The modern equivalent would be the Monome Norns: http://monome.org/norns/ http://monome.org/norns/ Or a Crackle Box: https://en.wikipedia.org/wiki/Kraakdoos https://en.wikipedia.org/wiki/Kraakdoos