Around here we mostly enjoy slide rules. We even have our own collections including some cylindrical and circular ones. But [Mathologer] discusses a recent Reddit post that explains a circular …read more (https://hackaday.com/2022/04/04/rubber-band-slide-rule-doesnt-slide-but-rotates/)

Detailed Big Screen Multimeter Review
https://hackaday.com/2022/04/04/detailed-big-screen-multimeter-review/

It seems like large-screen cheap meters are really catching on. [TheHWcave] does a very detailed review of a KAIWEETS KM601, which is exactly the same as a few dozen other …read more (https://hackaday.com/2022/04/04/detailed-big-screen-multimeter-review/)

ESP32: Is Two Better than One?
https://hackaday.com/2022/04/04/esp32-is-two-better-than-one/

We’ve looked at the WROOM-DA module before. It’s an ESP32 with two antennas, and [Andreas Spiess] says it is the ugliest ESP32 he’s ever seen. But beauty is only skin …read more (https://hackaday.com/2022/04/04/esp32-is-two-better-than-one/)

How Did Dolby Digital Sound Work On Film?
https://hackaday.com/2022/04/05/how-did-dolby-digital-sound-work-on-film/

When we go to the cinema and see a film in 2022, it’s very unlikely that what we’re seeing will in fact be a film. Instead of large reels of …read more (https://hackaday.com/2022/04/05/how-did-dolby-digital-sound-work-on-film/)

Wireless Bootloader Saves You From Swapping ROM Chips
https://hackaday.com/2022/04/05/wireless-bootloader-saves-you-from-swapping-rom-chips/

Flashing your code into an Arduino, an ESP32 or any other modern microcontroller platform is pretty straightforward: connect the device through USB, fire up the appropriate software platform, and press …read more (https://hackaday.com/2022/04/05/wireless-bootloader-saves-you-from-swapping-rom-chips/)

Hacker Dictionary: RS-485 Will Go the Distance
https://hackaday.com/2022/04/05/hacker-dictionary-rs-485-will-go-the-distance/

RS485 is a communication standard that should be part of the advanced hardware hacker’s arsenal; it’s not commonly encountered, but powerful exactly when you need it. It’s a physical layer …read more (https://hackaday.com/2022/04/05/hacker-dictionary-rs-485-will-go-the-distance/)

A Simple Linear Power Supply, Done Well
https://hackaday.com/2022/04/05/a-simple-linear-power-supply-done-well/

When reaching for a power supply design it’s normal here in 2022 to reach for a switching design. They’re lightweight, very efficient, and often available off-the-shelf at reasonable prices. Their …read more (https://hackaday.com/2022/04/05/a-simple-linear-power-supply-done-well/)

Magpies Help Each Other Escape Tracking Devices With This One Weird Trick
https://hackaday.com/2022/04/05/magpies-help-each-other-escape-tracking-devices-with-this-one-weird-trick/

Scientists who work with animals love to track their movements. This can provide interesting insights on everything from mating behaviour, food sources, and even the way animals behave socially – …read more (https://hackaday.com/2022/04/05/magpies-help-each-other-escape-tracking-devices-with-this-one-weird-trick/)