How many times have we heard "hey you could have just replaced that microcontroller with a 555"? Maybe 555 times! But we always find wiring up a timer chip to be a bit of a pain, you need quite a few components - especially if you want a buffered output. That's why we designed the Adafruit 555 PWM Output STEMMA - a fully-assembled 555 timer board with adjustable-frequency 50% duty square-wave output. https://elecena.pl/product/25835709/adafruit-555-pwm-output-stemma-1-5k-25-khz-or-1-5-250-hz 2024-05-09 https://elecena.pl/product/25835709/adafruit-555-pwm-output-stemma-1-5k-25-khz-or-1-5-250-hz 2024-06-19