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→Encoders directly connected to GPIO Pins
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==Encoders directly connected to GPIO Pins==
==Encoders directly connected to GPIO Pins==
−This is the original approach used from the start the Encoder were connected directly to GPIO pins on the Raspberry Pi.
+This is the original approach used from the start the Encoder were connected directly to GPIO pins on the Raspberry Pi.
+=== Connecting via the GPIO Pins. ===
+The raspberry Pi has a 40 pin connector that provides access to a level of connection not generally available to the PC world. This allows Digital devices to be connected to a Raspberry Pi and the Pi can both receive and transmit information to these devices as digital Data. +3.3V or 0v in electrical terms.
+This connector will probably exist as a standard for a considerable length of time, such is the electronic infrastructure that has grown around it. Indeed competitor boards, would dare use anything else so it's become ubiquitous, in a similar fashion to the IBM edge connectors carried on long after the company had stopped making PC's themselves.
+[https://pinout.xyz/ Here's a site devoted to it.]
+[[File:20250216 15h10m42s grim.png|thumb|Pi GPIO]]
==Encoders connected using a MCP23017 chip==
==Encoders connected using a MCP23017 chip==