Category Archives: bubble display

Chaining Together A 16×2 Bubble LED Display

We’ve recently noticed an uptick of interest in so-called “bubble displays”: vintage alphanumeric LEDs which are probably best remembered as being used in watches and calculators before the LCD took over. Today they’re available as surplus or even salvage for literally pennies, but unfortunately they only provide four or five …read more

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Posted in 74hc595, bubble display, classic hacks, HPDL-1414, LED display, led hacks, shift register | Leave a comment

New PCB Revives Ancient Bubble LED Displays

For those of us who remember LED calculators, the HP 5082-7400 series red “bubble” displays hold a special charm. Available in 3, 4, or 5-digit varieties, these multiplexed 7-segment displays provided countless hours of entertainment to those who would spell upside-down words on their pocket calculators. In case you happen …read more

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Posted in 7 segment, bubble display, HP5082, led hacks, Multiplex7seg | Leave a comment

A Stylish Low Part Count Non-Contact Thermometer

A non-contact thermometer is a pretty common tool these days, and one that most of us probably have kicking around the lab. You can grab them online for as little as $10 USD, and while they’re nowhere near as capable as a thermal camera, they certainly have their uses. But …read more

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Posted in 2019 Hackaday Prize, attiny2313, bubble display, IR thermometer, MLX90614, non-contact, tool hacks | Leave a comment