Logic I (AND, OR, XOR)


Logic one front view.

This logic module takes up to four input signals and outputs the logic function AND, OR, XOR dependent on the input signals. The inputs are normalized so you can use less then the four inputs.

Every input signal above +2.5V is logic high, below +2.5V logic low. The output is 5V logic high, 0V logic low. This module is mainly thought for processing gate and trigger signals but can be used with audio signals as well. If used in the audio range the output is a pulse train between 0V and 5V with variable duty cycle dependent on the input signals and the output used.

Specs and features



Logic I control board schematic

Logic I: Schematic control board

Logic I main board schematic

Logic I: Schematic main board


Nothing special to mention. On page one you see the input and outputs. On page two are the input protection circuitry, the microprocessor and the output buffers. The logic is done in software.



  • None

Building hints

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Special parts

  • None


Not available

Logic I front view

Logic I: Front view

Logic I populated control PCB

Logic I: Populated control PCB

Logic I populated main PCB

Logic I: Populated main PCB

Logic I back view

Logic I: Back view

Logic I back view

Logic I: Half front view

Logic I side view

Logic I: Side view

2022 March V 0.9.0-F

2022 March V 0.9.0-B

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