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SOS (Morse on onboard LED)

An original public-domain AVR sketch. It sets PB5 (the Uno onboard "L" LED) as an output and blinks S O S in Morse code forever — three dots, three dashes, three dots — with the proper 1:3 dot-to-dash ratio and inter-letter and word gaps, and prints a one-line banner on the serial monitor at boot. On-board only: nothing but PB5 and USART0.

Download ↓ Original source ↗

Format: Compiled AVR flash image (16-bit words, base64)  ·  By: emulators.org  ·  Licence: Public domain