Explains
How does a rotary encoder work? Quadrature made simple
A rotary encoder like the one in a volume knob reports steps, not where it points. Inside, two springy metal contacts, A and B, rub on a ...
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How do computers add numbers? Binary and logic gates
Computers add numbers in binary, with circuits built from logic gates. Every binary digit is a switch that is on (1) or off (0). An XOR g...
Code
How Does a Program Run? Hello World From Code to Screen
When you run Hello World, five things happen in a fraction of a second. Your source code, saved as plain bytes, is translated into someth...
Explains
What Happens When You Type a URL? DNS, TCP, TLS, HTTP
When you open a website, your computer first asks DNS to turn the name into an IP address, then opens a connection to that address, sets u...