Lumelodyertron (based on a 4051 multiplexer)

JingleJoe · Posted: Sat Jan 21, 2012 7:34 am Post subject:

I will be adding more to this, so far it's basically MK2's circuit but with potentiometer control instead of light sensitive resistor control and switches on the 4051's binary control inputs.
The slacker melody generator acctually divides the initial frequency into a reverse harmonic series, a non-standard scale. So you can't play tunes based in the standard western scale but you can make new tunes with it!

P.S. You may recognise a small riff I was able to figure out Smile

Draal · Posted: Sat Jan 21, 2012 8:17 am Post subject:

Pretty cool set up Cool

. I like the push buttons on the controller inputs; I might have to consider adding those to my 4051. That is, when I get the time to finish my lunetta rehouse Laughing

!

JingleJoe · Posted: Sat Jan 21, 2012 8:48 am Post subject:

Go for it! It's really easy to get the hang of playing it, to learn all you really need is the truth table and pinouts from a datasheet for the 4051 Smile

http://www.alldatasheet.com/datasheet-pdf/pdf/173652/UTC/4051.html (see page 5)

sizone · Posted: Sat Jan 21, 2012 8:21 pm Post subject:

Those some reused cat-5 twisted pairs I see? Approved.
Incidentally, if you go with a vco, it's possible to get something quite playable using a four button "binary" keyboard (four momentary switches either going straight to voltage dividers or a cmos analog switch with the outputs of the voltage dividers going to a summing circuit). It requires some practice to get the hang of the chording system for progressing along notes but it's kind of neat to be able to play tunes without moving your hand.

JingleJoe · Posted: Sun Jan 22, 2012 5:59 am Post subject: