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KEYSCAN INC. OCB8 GPIO Driver Board

I created this board to interface an old access control relay board with the GPIO pins on a raspberry pi. I wanted to use these boards because I got them for free and I need to use them to control heaters for my garden. These OCB8 Relay boards are super robust, so I figured it would be better to use them than order cheap relay modules.

Apply 5v power from a PSU to 5v screw terminal, and hook in any GPIO pin to any of the relay GPIO inputs. When GPIO_HIGH, 3.3v is applied to base pin of the transistor, causing the transistor to switch off which triggers the relay board with 5v.

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Dec 24,2023

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KEYSCAN INC. OCB8 GPIO Driver Board

4 Layers PCB 55 x 70 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen

This board was designed to interface a KEYSCAN INC. OCB8 relay board with a raspberry pi's GPIO pins.

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Published: Dec 24,2023

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