These are my build notes for the Nonlinear Circuits "Beat Freqs" module
Its eurorack format.
Its great for driving drums
This module is based on an earlier one:
The original had CV inputs, pots and an XNOR output.
This new "improved" version gets 12 extra gate outputs and a lot more flashing LEDs.
+Wiki
+BOM
The idea is to feed the circuit two signals and depending upon which one had the higher frequency 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.
Parts:
4070 x1 Soic Mouser: 595-CD4070BM96 yes
Same IC used in the divide and conquer module.
Its an IC with four XOR gates
TL072 or TL082 1 Soic Tayda: A-1139
LL4148 2 Tayda: A-1213
Reverse voltage protection
Im using a BAT54GWX, Mouser: 841-BAT54GWX
BC847 x16 Tayda: A-1339
3mm LED 16 bright ones!
CD4555 x2 soic Mouser: 595-CD4555BNSR
This is a CMOS Dual Binary to 1 of 4 Decoder/Demultiplexer
CD 40193 1 Soic Mouser: 595-CD40193BNSR
CMOS Presettable Up/down counter .... order
Resistors & Caps.
Lots of 2.2k resistors
RL ... Im using 2K
Get the jacks on first
LEDs
Finished.
Using 2 inputs:
Don't you just love it when it works the first time.
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You can find more NLC builds here.
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