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| Some changes to the original Portsdown interface were needed with some GPIO changes on the Raspbery PI 4, unused functions were removed and additional ones added.
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| [[File:Interface V2-12.jpg|400px]]
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| Parts list here [[:File:Portsdown Interface V2-12 parts.xlsx]]#
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| Schematic here [[:File:PD 4 INTERFACE V2-12.pdf]]
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| GPIO list for the Raspberry 4 with Portsdown here https://wiki.batc.org.uk/Portsdown_4_GPIO_Connections
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| [[File:PD 4 INTERFACE V2-1 SS.png|400px]]
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| The Raspberry PI 4 runs hotter than the Raspberry pi 3 so consideration must be given to allow more space for air flow. I stand off the PCB to accommodate air flow.
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| [[File:7 inch P4.jpg|400px]]
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| [[File:5 inch screen.jpg|400px]]
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