LED Bubbles from the 1970s Tell the Time
https://hackaday.com/2022/01/11/led-bubbles-from-the-1970s-tell-the-time/

[CuriousMarc] is nothing if not curious. Finding some old TI timekeeping chips to reverse engineer, he set out to make a clock using old-fashioned “bubble LEDs.” You can see the …read more (https://hackaday.com/2022/01/11/led-bubbles-from-the-1970s-tell-the-time/)

Haber-Bosch and the Greening of Ammonia Production
https://hackaday.com/2022/01/11/haber-bosch-and-the-greening-of-ammonia-production/

We here on Earth live at the bottom of an ocean of nitrogen. Nearly 80% of every breath we take is nitrogen, and the element is a vital component of …read more (https://hackaday.com/2022/01/11/haber-bosch-and-the-greening-of-ammonia-production/)

Reusable Booster Rockets, Asian Roundup
https://hackaday.com/2022/01/11/reusable-booster-rockets-asian-roundup/

India’s GSLV Mark III rocket via Wikipedia https://en.wikipedia.org/wiki/GSLV_Mark_III#/media/File:GSLV_Mk_III_D2_with_GSAT-29_on_Second_Launch_Pad_of_Satish_Dhawan_Space_Centre,_Sriharikota_(SDSC_SHAR).jpg
" data-medium-file="https://hackaday.com/wp-content/uploads/2022/01/reuse-feature.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2022/01/reuse-feature.jpg?w=800">The Space Shuttle’s solid rocket boosters were reusable, although ultimately the overall system didn’t prove cheaper than expendable launches. But given the successes of the Falcon 9 program — booster …read more (https://hackaday.com/2022/01/11/reusable-booster-rockets-asian-roundup/)

3D Printering: Soldering a Heated Bed
https://hackaday.com/2022/01/11/3d-printering-soldering-a-heated-bed/

There’s an old saying about something being a “drop in the ocean.” That’s how I felt faced with the prospect of replacing a 12 V heated bed on my printer …read more (https://hackaday.com/2022/01/11/3d-printering-soldering-a-heated-bed/)

Electronic Drum Toy Built From Scratch
https://hackaday.com/2022/01/11/electronic-drum-toy-built-from-scratch/

Drum kits used to be key to any serious band, however, these days, much of our music is created on computer or using a drum machine instead. [spanceac] has built …read more (https://hackaday.com/2022/01/11/electronic-drum-toy-built-from-scratch/)

Honda Ignition Coils Sing The Song of Their People
https://hackaday.com/2022/01/11/honda-ignition-coils-sing-the-song-of-their-people/

High-voltage experimenters have been using automotive ignition coils to generate impressive sparks in the home lab for decades, and why not? They’re cheap, easily obtainable, and at the end of …read more (https://hackaday.com/2022/01/11/honda-ignition-coils-sing-the-song-of-their-people/)

3D Printed Sensor For Finding Wind Direction And Likely Much More
https://hackaday.com/2022/01/11/3d-printed-sensor-for-finding-wind-direction-and-likely-much-more/