will nothing work???

[DJMaytag]

At 09:26 AM 6/21/96 -0700, you wrote:
>   Hi Mitch -
>       Let me start off by saying don't get discouraged, stuff that
>   works on paper does NOT always work in the "real world". If I
>   was taught anything in tech school, it was this!

thank god, i think...

>       Getting to your circuit - if it is truly going from 5v to a 
>   momentary 0v, what I would do is this: feed that output to a 
>   comparator (LM 339 works well) to get good solid logic 1's and
>   0's, feed that to a schmitt trigger inverter (7414). The schmitt
>   trigger does two things: It squares up the pulse out AND inverts
>   it. (most clock or "tap" inputs are positive, not negative logic,
>   BTW.) You could get real fancy and use one of those extra inverters
>   to drive a low current LED (approx 10mA sink for 7414) like this:
>
>                      |\       |\
>   from 339 -------+--| o------| o---|<--\/\/\/--- V+      
>                   |  |/ 7414  |/7414 LED   290 ohm
>                   |
>                   |    
>                   |  |\
>                   +--| o------------------------- to tap in
>                      |/ 7414

>                   |\
>   from 606 -------|+\
>                   |  \
>                   |   ---------- to above ckt
>                   |  /
>            +------|-/
>            |      |/ LM339
>            |
>            |
>            |      | v+
>            |      \
>            |      /
>            +----->\ 10k multi turn (sets trigger threshhold)
>                   /
>                   \
>                   |
>                   |
>                 -----
>                  ---
>                   - 
>
>        This should get you in the ballpark - just send out repetitive triggers
>    from the 606, and adjust the pot until you get good, clean on/offs from
>    the LED. Then you are ready to hook it uo to your Vortex.
>       (all voltages are 5v, BTW)

ok, is this going to be able to give the vortex a s-trig that it needs to
see at it's input? this is what i'm trying to accomplish with THIS circuit.
i'm also trying to mod a second 606 i have for more trigger outputs than the
two it already has. i AM using a few LM333's to do this 606 mod with, which
i think should do the trick. roland uses AN6912's in the circuit to send
external triggers for the toms. i duplicated that exact circuit and it isn't
working at all.

i don't know if you know much about the 606's workings or not, but i've
gotten into the habit of hitting up anyone for info on this mod i'm doing,
so i'm not going to bug ya unless it's cool with you.

mitch

djmaytag at terracom.net

three things to remember about me:
1) i'm not a dj
2) i have no intentions of becoming a dj
3) i'm not a washer and dryer repairman either