It's Not a Bug It's a Floating Input T-Shirt, Funny Embedded Engineer Tee, Microcontroller Gift

The pin reads 1, 0, 1, 1, 0... depending on the weather. It's not a bug, it's a floating input. A microcontroller pin tied to nothing but a balloon, a readout box full of random bits and the fix every embedded engineer eventually learns: a 10 kΩ pull-up resistor (or enable the internal one).

What you get

• Front: Left-chest green balloon on a dashed string tied to a chip pin, "Floating Input · Not a Bug · Magic Smoke Society"
• Back: Large "IT'S NOT A BUG, IT'S A FLOATING INPUT." headline over an MCU chip whose pin PB1 is tied to a green balloon, a "PB1 reads: 1 0 1 1 0 ? 1 0" box and a "The Fix" panel with a 10 kΩ pull-up schematic
• Printed with premium DTF transfers and heat-pressed by hand in Charleston, SC

Choose your shirt

• Comfort Colors 1717: heavyweight 6.1 oz garment-dyed cotton, relaxed fit (S–3XL)
• Bella+Canvas 3001: lightweight 4.2 oz Airlume cotton, softer retail fit (S–3XL)

Colors may vary slightly by screen.

Care

Wash inside out in cold water, tumble dry low or hang dry, don't iron the print.

Production & disclosure

Designed by Elevated Designs LLC using digital design tools, with AI assistance. Printed and pressed to order in Charleston, SC.

Magic Smoke Society · electrical engineers and electronics hobbyists — designed by Elevated Designs and printed to order in Charleston, SC.