These are my build notes for the NLC Beat frequency module.
This is a indicator module not an oscillator.
Beat frequency indicators are used to indicate whenever the frequency of a signal exceeds a reference frequency.
This module uses LEDs to indicate when the two frequencies match.
"the ring of 4 LEDs would light up in a clockwise or anti-clockwise direction. The speed of rotation would indicate how close or disparate the frequencies are. If the signals have the same frequency then just one LED is lit."
Some pics of the virgin PCBs
I'm not exactly sure how I'll use this.
As far as I understand it takes 2 incoming signals, then spits out CV or audio???
plus XNOR of the 2 signals and gates to give a ring modulator effect.
The two inputs can be either audio or clock (LFO) rates.
Maybe I'll feed it with some VCOs and use the outputted CVs and gates to control a filter and some drums. ???
This is version 4 of the PCB, .... its missing a trace, so a wire will need to be added if you want 5V gates. If you can’t be bothered it just means one of your
gate out signals will be 10V rather than 5V.
I personally like 10V gates. So I may keep this as is.
I always start with the ICs first.
We need one of each of these
4555 1 soic Mouser: 595-CD4555BNSR
40193 1 Soic Mouser: 595-CD40193BNSR
4070 1 Soic Mouser: 595-CD4070BM96
The CD4555 is a CMOS decoder/demultiplexer.
The CD40193 is a up/down binary counter.
The CD4070 is a Quad Exclusive-OR Gate.
power rectifier diode
821-S1JL
BC847
there are six of these
Two diodes
LL4148
Links
+ BOM
+ Wiki
To be continued.................
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