We’ve been waiting patiently for some versatile logic options in Eurorack DIY and then three come along at once!
This comprehensive suite of Logic modules will have you creating complex rhythmic patterns in no time at all and allow you to inter-modulate your clock and sequencer modules at yet deeper and mysterious levels!
Discrete transistor XNOR/XOR/NOT logic gate
Discrete XNOR/XOR, XOR and NOT gates.
The resistor-transistor based circuit design gives the module some interesting quirks thanks to the transistors thresholds and tolerances when playing around with different amplitudes, waveforms and frequency rates of the incoming signals, making it fun and useful to explore beyond typical logic gating duties, for example as an audio waveshaper/distortion.
It can be patched as two NOT gates and one 2-input XOR gate,
one NOT gate, one 2-input XOR gate and one 2-input XNOR/XOR gate,
two 2-input XNOR/XOR gates
or one NOT gate and one 3-input XNOR/XOR gate.
Gate one and two has two inputs, the third has one. The XOR out from gate one is being normalled to input 1 on gate two. The XOR out from gate two is being normalled to the single input on gate three (NOT).
Dual discrete transistor NOR/OR logic gate
Two discrete NOR/OR logic gates.
The resistor-transistor based circuit design gives the module some interesting quirks thanks to the transistors thresholds and tolerances when playing around with different amplitudes, waveforms and frequency rates of the incoming signals, making it fun and useful to explore beyond typical logic gating duties, for example as an audio waveshaper/distortion.
It can be patched as two NOT gates,
one NOT gate and one 2- or 3-input NOR/OR gate,
one 2-input NOR/OR gate and one 2- or 3-input NOR/OR gate
or one 4-input NOR/OR gate.
Gate one has three inputs, the second has two. The OR out from gate one is being normalled to input 1 on gate two.
Dual discrete transistor NAND/AND logic gate
Two discrete NAND/AND logic gates.
The resistor-transistor based circuit design gives the module some interesting quirks thanks to the transistors thresholds and tolerances when playing around with different amplitudes, waveforms and frequency rates of the incoming signals, making it fun and useful to explore beyond typical logic gating duties, for example as an audio waveshaper/distortion.
It can be patched as two NOT gates,
one NOT gate and one 2- or 3-input NAND/AND gate,
one 2-input NAND/AND gate and one 2- or 3-input NAND/AND gate
or one 4-input NAND/AND gate.
Gate one has three inputs, the second has two. The inputs on gate one is normalled in a 1>2>3 fashion for efficient cable and time-saving patching. The inputs on gate two has also been normalled 1>2, with the AND out from gate one in turn being normalled to input 1 on gate two.
Build documents and BOMs here – http://ljunggrenaudio.com/products/boolean%20logic.html