These are my build notes for the NLC Big Jobs module.
This module is an audio rate chaotic signal generator; it contains 3 phase locked loop ICs (PLL) connected in a circle via their phase difference inputs.
There is an early NLC module called a Vactrol PiLL ... this is possibly related
Vactrol PiLL - Build notes
The Big jobs was inspired by the paper - A New Type of Intermittency from a Ring
of Four Coupled Phase-Locked Loops by Hasegawa et al – although uses
just 3 stages and has external control.
It looks like a pretty easy build.
The 4046 ICs are the Phase lock Loop CMOS chips
Links
+Wiki
+ Vactrol PiLL - Build notes
I'm going to build my own vactrol
Some notes:
In andrew's notes he talks about using the GL5516
The 5516 gives about 50 Ohms at full brightness
I'll use a 5516 & a 4.7k resistor and a orange LED
"
The circuit for driving the vactrols is quite minimal: one
resistor! So it is better to make your own vactrol and use the
brightest LED you can find. Then select RL to be at least 4k7 which
seems to be enough to protect the LED from any harm.For LDRs, you can
buy them from Tayda but cheapest option is a bag of 100 GL5516 on
ebay will cost $4 or so, with postage.
"
There are 3 seperate circuits, so you will need to make 3 vactrols.
Im using the s1Jl for protection against accidently plugging the module in backwards
Install headers to PCB 1
PCB 1 attaches to the faceplate
You're done :-)
Links
+Wiki
+ Vactrol PiLL - Build notes
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You can find more NLC builds here.
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