Part 3 of the build for Poulty in Motion
This module can be viewed as a VC delay on the top
and a clock divider on the bottom with sync out.
The Clock Jack is an input.
The sync out is fed to a divider to get 12 stages of sync signal.
The sync signal source is a Pt2333 delay IC.
Another way to use this module is as a VCO with divided outputs.
Its not calibrated to 1V/oct , but you can still use the clock input to control the pitch.
In egg timer mode the crystal will generate a second
count (0.125Hz, 0.25Hz, 0.5Hz, 1Hz, etc). This is for getting your
system to work with BPM type drum machines or just to have a regular
count or whatever you think might be fun.
----------------------------------
Part 1 of the build is here:
Part 2 is here
RL Leds
The RL next to the vactrol determines the brightness of the LED in
the vactrol. If using a shop one, just shove in 1k. If using a DIY
with a bright LED, then 2k2-4k7 should suffice.
I'm using 2.7k resistors on all the RLs.
My vactrol will be diy
---------------------------------
32.768kHz crystal
Purchased on tayda
Andrew mentioned the oscillator vibrating.
" The crystal is a bit delicate, best to fold it down flat on the
PCB once installed so it doesn’t get bumped around. On the 3rd prototype the module put out a high pitched whine, not from the outputs,
it was the module itself. This turned out to be the crystal
vibrating; it is easily fixed by moving it a little, press it down
harder against the PCB. Worst case you may need to give it a dab of
hot glue as a cushion. This only happened with one build, so I guess
it is not that common."
I'm testing using some bluetac as a cushion.
---
vactrol time
"DIY is fine with GL5506/GL5516, LED
and some heatshrink, otherwise
something like NSL-32 will do."
using a Gl5516 & orange LED
The GL5516 are cheap ... bought a pack of 100 on ebay
Shrink wrap the two.
headers
Jacks & Pots
The pots are B100k
LEDs and the toggle switch
Its done
-----------------------------------------------------------------------------------
You can find more NLC builds here.
---------------------------------------------------------------------------------------
No comments:
Post a Comment