[sdiy] Re: SDIY Withdrawal Symptoms

[Kevin Lightner]

>Harry,
>
>>BTW one list member was making a series of small
>>modules... His first was a very small ASM style
>>VCO.  Who done it ???  (confess !)
>
>It was Neil Johnson.
>http://www.milton.arachsys.com/nj71/index.php?menu=2&submenu=0&subsubmenu=0
>
>I personally think a common pin out isn't essential, it woudl be 
>hard to do this for a quad VCA, a VCO and a VCF.
>I would suggest a common number of pins, say 16, with common 
>spacing, again 0.1"seems sensible, and with common supply rails +15, 
>-15, +5 and GND. So the supply pins are always on the same 4 pins, 
>this would avoid connecting stuff upwrong and blowing modules.
>
>I would also like to suggest a common form factor, SIP (a bit like a 
>SIMM). It Seems, to me, the most sensible as you can make the SIPs 
>taller and double sided if you need to fit more on, without taking 
>more board real-estate.
>
>Paul


You might want to define some loose standards for pinout regarding grouping.
For example, CV inputs here, outputs there. Then a module like an 
"arp filter" can be swapped with another sharing filter with the same 
pinout or even a vco. For all we know, someone might even make a 
"defineable" holder module with jacks, pots and a ZIF socket (or 
whatever) to support these goodies.

If cost wasn't a factor, I'd even add smd leds and drivers to each 
board to indicate various voltages :)


-- 
Regards,
Kevin Lightner

http://www.synthfool.com