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Raspberry Pi: Using GPIO Inputs

How to connect physical switches, reed switches and an Adafruit IR reflectance sensor to any Raspberry Pi and communicate with them using Python. I also explain in depth the concept of pull-up and pull-down resistors. You can access all of the code and circuit diagrams featured in this video here: http://www.explainingcomputers.com/pi... The Adafruit IR reflectance sensor can be obtained from Adafruit in the USA here: https://www.adafruit.com/product/2349 -- or from Pimoroni in the UK here: https://shop.pimoroni.com/products/re... You may also like my videos on Raspberry Pi robotics, such as this one in which I explain how to use GPIO inputs:    • Raspberry Pi Robotics #1: GPIO Control   I also have a playlist of Raspberry Pi cooling videos here:    • Raspberry Pi 3 Cooling   Some of my other Raspberry Pi videos include this one where I spend a whole week using a Raspberry Pi as my only computer:    • Pi Week: Raspberry Pi as Only PC   More videos on computing-related topics can be found at:    / explainingcomputers   You may also like my ExplainingTheFuture channel at:    / explainingthefuture