[sdiy] Sequencer Idea

[James Husted]

on 10/3/01 2:17 PM, Atom 'Smasher' at atom at suspicious.org wrote:

> i did some stuff a while ago, using the blacet chip to generate pulses....
> 
> i used a 4017 to divide by 3, then a 4024 to divide by 8 or 32, selectable
> by a switch.

I saw a circuit once a long time ago in a EDN mag that was a great way to
get divide-by-almost-anything clock train. Take your clock and run a counter
chip with it. Make a resistor ladder to change the counter's out to a crude
ramp. Use a level comparator to make a gate at a certain voltage level
compared to a pot connected to DC, and outputting it as the new clock. This
signal also goes back to the counter and resets it (and so the ramp being
compared). Basically your dividing by up to the number of steps the counter
counts to. Looked like it would be really cheap to make. If you made another
comparator circuit looking at the first ones ramp, but set to a different
level, you can get rhythmic pulse trains.
-j

-- 
James Husted                        The ErsatZ Planet
james at ersatzplanet.com           www.ersatzplanet.com

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