usb-relay control with Pascal

Sample program using Pascal code controling an usb-relay

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Last Update: 2026-05-11

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This is a sample program for Windows demonstrating how to control an usb-relay using Pascal code written in Lazarus & FPC. This program is used to control the azimuth of an astronomical dome. The usb-control of the relay is in unit usbrelay.pas

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usb-relay control with a Pascal program

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