Dave tears down and investigates a Dell infrared IR optical touch screen monitor found in the dumpster.br Infrared touch screen are not often used in consumer computer monitor applications compared to resistive and capacitive touch screen technologies.br br Forum: br br Subscribe on Library: EEVblog Web Site: The 2nd EEVblog Channel: EEVdiscover: Support the EEVblog through Patreon! br AliExpress Affiliate: Buy anything through that link and Dave gets a commission at no cost to you.