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bit late to the party, but I was successful by using a 5v USB-A port on the back of my projector. You can see it work on my most recent post. The parts needed: Spare (or current) wireless screen remote and USB cable (you'll cut the device end off and just use the USB-B as the power source. If it has white and green wires, you won't use them. You only need red and black) 2-channel 5v relay - https://a.co/d/0cOenbts Arduino board (I went with the Arduino Uno R3) - https://a.co/d/0fV5FO2t <or> you can go with a cheaper board that's Arduino compatible https://a.co/d/0gZGcNnD (comes with USB-B USB-B cable for the Arduino, no needed if you go with a cheaper board with the cable included Some wire and jumpers for connections (wire- https://a.co/d/0dxIo7MN) (breadboard/jumpers- https://a.co/d/08P0NXnN) It will require some coding, but it's nothing AI can't help you with. Tell AI you need an Arduino sketch for the following: ``` I need an Arduino Sketch to automate the projector screen power from a 5v USB trigger on the back of my projector. Here's how it should work using an Arduino UNO R3: Arduino watches pin 2 for voltage: 5V present = projector ON 0V = projector OFF It remembers the last projector state and compares it to the current state in each loop. When the projector turns ON: OFF>ON transition is detected Arduino pulses relay pin 8 This simulates pressing the screen DOWN button When the projector turns OFF: ON>OFF transition is detected Arduino pulses relay pin 9 This simulates pressing the screen UP button The relay module is active LOW: LOW = relay ON HIGH = relay OFF The pulseRelay() function: Turns the relay ON for 500 milliseconds Then turns it back OFF This creates a momentary button press instead of holding it A 3 second delay is included after each action to avoid double-triggering. Serial monitor output is included for debugging and status updates. In short: Projector ON = screen down Projector OFF = screen up ```