The operational amplifier, or op amp, is one of the most basic building blocks used in analog circuits. Ever since single-chip op amps were introduced in the 1960s, thousands of …read more (https://hackaday.com/2022/01/06/from-nanoamps-to-gigahertz-the-worlds-most-extreme-op-amps/)

555 Timer Contest Entry: A Digital Counter with Nothing but 555s
https://hackaday.com/2022/01/06/555-timer-contest-entry-a-digital-counter-with-nothing-but-555s/

With a 555 on the BOM, you never know what you’re going to get. With 40 of the versatile timer chips in a build, you might just get something completely …read more (https://hackaday.com/2022/01/06/555-timer-contest-entry-a-digital-counter-with-nothing-but-555s/)

Remoticon 2021: Unbinare Brings A Reverse-Engineering Toolkit Into Recycling
https://hackaday.com/2022/01/06/remoticon-2021-unbinare-brings-a-reverse-engineering-toolkit-into-recycling/

Unbinare is a small Belgian company at the forefront of hacking e-waste into something useful, collaborating with recycling and refurbishing companies. Reverse-engineering is a novel way to approach recycling, but …read more (https://hackaday.com/2022/01/06/remoticon-2021-unbinare-brings-a-reverse-engineering-toolkit-into-recycling/)

$7 Tent Heater Provides Comfort on a Budget
https://hackaday.com/2022/01/06/7-tent-heater-provides-comfort-on-a-budget/

Alcohol stove under a terra cotta planter.
" data-image-caption="" data-medium-file="https://hackaday.com/wp-content/uploads/2022/01/2022-01-03-Alcohol-Jet-Burner-Feat.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2022/01/2022-01-03-Alcohol-Jet-Burner-Feat.jpg?w=800">At Hackaday’s Minnesota office, we appreciate central heat and hot coffee because the outdoor temperature is sub-zero in Celsius and Fahrenheit. Not everyone here has such amenities, and families living …read more (https://hackaday.com/2022/01/06/7-tent-heater-provides-comfort-on-a-budget/)

Hidden Model Railroading Taken To The Nth Scale
https://hackaday.com/2022/01/06/hidden-model-railroading-taken-to-the-nth-scale/

Most of us would be pretty happy with ourselves if we made one of those neat “epoxy river” types of art for our home. Not so with prolific maker [Peter …read more (https://hackaday.com/2022/01/06/hidden-model-railroading-taken-to-the-nth-scale/)

LEGOpunk Orrery Knows Just the Right Technics
https://hackaday.com/2022/01/06/legopunk-orrery-knows-just-the-right-technics/

Is the unmistakable sound of the shuffling of LEGO pieces being dug through burned into your psyche? Did the catalog of ever more complex Technic pieces send your imagination soaring …read more (https://hackaday.com/2022/01/06/legopunk-orrery-knows-just-the-right-technics/)

How Do Capacitors Work?
https://hackaday.com/2022/01/06/how-do-capacitors-work/

If you are like [The Science Asylum], you might wonder how a capacitor can work since, at their core, they are nothing more than a gap filled with air or …read more (https://hackaday.com/2022/01/06/how-do-capacitors-work/)

Tiny LED Matrix Panels Tile Together Perfectly
https://hackaday.com/2022/01/06/tiny-led-matrix-panels-tile-together-perfectly/