Portsdown 5 Introduction

Introduction

The Portsdown 5 is a Digital ATV Transmitter, receiver and test apparatus designed to run on a Raspberry Pi 5 with a Raspberry Pi 7 inch Touchscreen Version 1. The newer, higher definition, Touchscreen 2 is not yet supported, although provision is being made for possible future support.

Some of the Portsdown 5 software (the receiver and the test equipment) will run on a Raspberry Pi 4, but the H264 encoding used for transmit requires the upgraded processor in the Raspberry Pi 5.

Construction

When considering the mechanical design, the normal (older) touchscreen display should be mounted with the PCB legend upside down for the best viewing angle. The software does have the ability to drive the display in either orientation.

In due course, the software might support the Touchscreen 2 in the normal (landscape) orientation (with the PCB legend the right way up) as it has a better viewing angle.

When connecting the Touchscreen, it should be connected to the port labelled "CAM/DISP 0" with the conductive side of the ribbon facing the network port. On the display, the conductive side of the ribbon should be "upward" (visible) in the connector.

Future connections of the Touchscreen 2 should be made to the connector labelled "CAM/DISP 1"

The draft GPIO connections for the Portsdown 5 (which have changed significantly from the Portsdown 4) are here Portsdown 5 GPIO Connections