OptoInputMinimal

This repo contains a Kicad project of a very primitive opto-isolated binary input for arduino. It contains 8 inputs. The bill of materials as follows:

• Input R: 1K
• Output R: 4.7K
• Optocoupler: 4n25
• 3.5mm screw terminal blocks (e.g. 6pcs of 2 pin and 3pcs of 3 pin)

Schematic

3D view