[sdiy] 4017 troubleshooting update

[Theo]

Err.., the schematic show NO power connections for either the 4093 nor 4017
nor TL072.
You have to know how to hookup the power yourself.
If things don't work, guess connecting the power pins is your first stop ;)

Pin 8 of the 4093 goes to a switch (those purple thingies are switches)
which let you toggle between GND and V+.
This is the start stop switch for the sequencer.
BTW, its better to connect pin 8 to the switch AND to a 33k resistor to GND.

Theo


From: the mystic satin <elmystico at earthlink.net>

> ahhhh! that makes a lot of sense, the other mismatched #'s were simply
> illegible on the schematic and my guesses were wrong (8 looked like a 6
> etc...)  But.. check this one out... the schematic has supply for the 4093
> labeled as pin 8, while the datasheet lists supply as pin 14...
>
> any guesses?
> I love math...
> ----------
> >From: matti <matti at devo.com>
> >To: synth <synth-diy at dropmix.xs4all.nl>
> >Subject: Re: [sdiy] 4017 troubleshooting update
> >Date: Sat, Aug 25, 2001, 3:33 PM
> >
>
> >
> >The counting starts at 0. So,the _first_ output corresponds to _Q0_, pin
> >3. Go ahead and shake your first at those silly math types. Maybe you'll
> >start a revolution.
> >
> >On Sat, 25 Aug 2001, Gavin Russom wrote:
> >
> >> hi all, continuing to troubleshoot the 4017 sequencer schematic, thanks
for
> >> the tip on the output resistor.  It seems to me that the pins on the
4017 IC
> >> are also labelled wrong... the schematic has the output pins labelled
(in
> >> order of sequencer step)
> >> step 1 = pin 3
> >> step 2 = pin 2
> >...
> >
> >
> >-
> >finland red
> >germany black
> >egypt white
> >