[sdiy] Substitute for pin matrixes?

[Derek Holzer]

In this vein, can anyone tell me how the program cards for the Buchla 
Music Easel work?

FROM http://www.buchla.com/historical/music_easel/music_easel.html

> Further augmenting the Music Easel's real time performability is the capability of permanently storing and immediately retrieving complete instrument definitions (patches) or portions thereof. (An "instrument definition" includes settings of parameters, degrees of articulation, switch positions and interconnections.) Storage entails the installment of resistors on program cards; retrieval is accomplished by plugging in a desired program card and activating a switch.

FROM http://www.vintagesynth.com/misc/buchla200.php

> The Music Easel also featured a relative breakthrough for its time: Patch storage! But it was rudimentary storage - resistors installed to "program" cards were used. You needed one card full of resistors for each patch and they had to be manually plugged in to be used. They stored slider, switch and knob positions as well as patch-point connections. To be used they had to be inserted into a slot, one at a time, on the upper left side of the synth. They can also be seen in the picture above in their own storage compartment directly above the patch cord storage compartment. The Music Easel originally sold with six blank cards and some resistors and instructions.

Is it also like a matrix with pre-patched connections on each card? 
Various voltage-dividing resistors?

D.

Tim Daugard wrote:
>>
> 
> Way to expencive and complex, im talking about *dead cheap*
> that rules out most things based on electronics and even
> relay mechanical!
> 
> And it has to be quite small to!
>>
> Punch cards slid between a proto board with strips and a proto board 
> with strips with pins, wires, or flat pieces of copper hanging down?
> 
> The proto borad could be cut in half to supply both pieces.


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::: derek holzer ::: http://macumbista.net :::
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