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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.
KEYSCAN INC. OCB8 GPIO Driver Board
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