15V 7400 logic family??

[Christopher_List at Sonymusic.Com]

> THe 4516 will let you count up or down,
> which is a feature I find really useful. It also
> has parallel inputs, in case you want to jam
> some crazy bits in and do strange, non linear sequencing.

Don't forget that this allows you to thrown in an A-D converter to do
volts->step sequencing (obviously this isn't addressed to you, Romeo, we've
talked about this plenty!)....


> Hm... the sequencer I built uses 15V.
> The output is then scaled to 10
> with an opamp.

Something I found useful and easy was a switch on each output that changes
the scale from a 0 to 5v output - for fine tuning of pitches, etc. -  to
-5v / +5v - for when you want to use the sequencer to output waveforms at
audio frequency. This can be done with a DPDT switch on each output. - One
half of the switch selects the feedback reisitor of the summing op-amp on
the output, the other selects an offset voltage resistor...

- CList