Dirty little secret time: although amateur radio operators talk a good game about relishing the technical challenge of building their own radio equipment, what’s really behind all the DIY gear …read more (https://hackaday.com/2023/04/25/low-cost-rf-power-sensor-gets-all-the-details-right/)

Retrotechtacular: Putting Pictures on the Wire in the 1930s
https://hackaday.com/2023/04/25/retrotechtacular-putting-pictures-on-the-wire-in-the-1930s/

Remember fax machines? They used to be all the rage, and to be honest it was pretty cool to be able to send images back and forth over telephone lines. …read more (https://hackaday.com/2023/04/25/retrotechtacular-putting-pictures-on-the-wire-in-the-1930s/)

Op Amp Contest: A Slice Of The ’70s
https://hackaday.com/2023/04/25/op-amp-contest-a-slice-of-the-70s/

The 1970s was a great time to be an electronics hobbyist, as a whole new world of analogue integrated circuits was coming down in price while new devices would appear …read more (https://hackaday.com/2023/04/25/op-amp-contest-a-slice-of-the-70s/)

Very Slow Movie Player Avoids E-Ink Ghosting With Machine Learning
https://hackaday.com/2023/04/25/very-slow-movie-player-avoids-e-ink-ghosting-with-machine-learning/

[mat kelcey] was so impressed and inspired by the concept of a very slow movie player (which is the playing of a movie at a slow rate on a kind …read more (https://hackaday.com/2023/04/25/very-slow-movie-player-avoids-e-ink-ghosting-with-machine-learning/)

Insulin Pump Teardown Shows One Motor Does Many Jobs
https://hackaday.com/2023/04/25/insulin-pump-teardown-shows-one-motor-does-many-jobs/

Modern insulin pumps are self-contained devices that attach to a user’s skin via an adhesive patch, and are responsible for administering insulin as needed. Curious as to what was inside, …read more (https://hackaday.com/2023/04/25/insulin-pump-teardown-shows-one-motor-does-many-jobs/)

Reading Ptolemy’s Treatise on the Meteoroscope On Palimpsests After Centuries of Recovery Attempts
https://hackaday.com/2023/04/25/reading-ptolemys-treatise-on-the-meteoroscope-on-palimpsests-after-centuries-of-recovery-attempts/

Ambrosianus L 99 sup., p. 190, ll. 14–23, UV fluorescence image by Lumière Technology. Upside-down Latin overtext in dark brown and Greek undertext in light brown.
" data-medium-file="https://hackaday.com/wp-content/uploads/2023/04/uv_fluorescence_palimpsest_ambrosianus_l_99_ll_14-23.jpeg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2023/04/uv_fluorescence_palimpsest_ambrosianus_l_99_ll_14-23.jpeg?w=800">During the Middle Ages much of Ancient Greek and Roman scientific, legal and similarly significant texts written on parchment were commonly erased, mostly because of the high cost of new …read more (https://hackaday.com/2023/04/25/reading-ptolemys-treatise-on-the-meteoroscope-on-palimpsests-after-centuries-of-recovery-attempts/)

Bass Reactive LEDs For Your Car
https://hackaday.com/2023/04/25/bass-reactive-leds-for-your-car/

[Stephen Carey] wanted to spruce up his car with sound reactive LEDs but couldn’t quite find the right project online. Instead, he wound up assembling a custom bass reactive LED …read more (https://hackaday.com/2023/04/25/bass-reactive-leds-for-your-car/)

Vectrex Light Pen Works Without a Raster
https://hackaday.com/2023/04/26/vectrex-light-pen-works-without-a-raster/