Beat Frequency - NLC - Build notes - part 2

This is part 2 of my build notes for the NLC Beat freq module.

Part 1 is here

Beat Freq - build notes - part 1  

 

The module is in Eurorack format.

It's a CV and Gate generator.

 

You input two signals - audio or LFO rates and the module spits out CVs and gates

depending on the frequency difference between the two inputs.

Plus the module has lots of flashing / rotating LEDs which are always cool to watch.

All DIY. - The SMD is mostly 0805, pretty straightforward.

The build so far.

All ICs , diodes, trannies are on.

 the resistors now.

Re the LED resistors:

"RL: These are the resistors for driving the LEDs. As the resistors are shining thru the window on the panel, you want them brighter than usual. For example, if I normally use 10k for RL for a particular LED, I would use 4k7 for the same LED in this module."

I think I'll try 4.7K. 

If you are like me, you may have bought a bunch of LEDs off EBay many years ago and cant remember their specifications. So if the LEDs aren't bright enough, just swap them for a lower value.

There is just one PCB to populate.

Caps next.

All pots 100K

+ LEDs 

+ Logic Modules - The 7 gates

I'm using orange LEDs only because I have lots of them.

don't solder anything in till you have the panel on

Links

+ BOM

+ Wiki

+ https://yusynth.net/archives/WirelessWorld/C-Clapp-BeatFreq-1976.pdf

+ https://djjondent.blogspot.com/2014/06/bruel-kjaer-beat-frequency-oscillator.html

 

 

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