Open Hardware/Modding: ESP3S3, Pi Pico, RP2040, and Hackaday

posted by Roy Schestowitz on Mar 17, 2023

• ESP32S3 dev board can be pre-ordered for $7.49

  The XIAO ESP3S3 is a thumb size module enabled with 2.4GHz Wi-Fi and BLE 5.0 connectivity. The new SeeedStudio board includes lithium battery charging support and it provides up to 11x GPIOs.

• Fish Tank Dosing Pump Built Using Pi Pico

  When you’re maintaining a fish tank, it’s actually quite important to get all your basic chemistry right. Mismanage things, and you’ll kill all the helpful bacteria in the tank, or kill your fish when things get too alkaline or too acidic. To help him get things just right, [yojoebosolo] built a custom dosing pump to maintain his fishtank.

• RP2040 smart event badges for Hacker Hotel

  Hacker Hotel attendees weren’t given just any old badge and lanyard this year; they were adorned with an RP2040-based piece of artwork that not only sent you around the hotel to find everything, but also tested you with a few on-board games.

  RP2040 is the brains of this event amulet, with a CR2032 coin cell powering everything. The top third of the badge carries the circuitry and the lower two thirds has a row of buttons and LEDs which do lots of fun things. More on that later.

• Hackaday Berlin: Final Schedule, Last Call For Tickets, And More

  Hackaday Berlin is just about a week away, and we’ve just put the finishing touches on our preparations. And that includes a snazzy landing page, the full schedule, details on the Friday night meetup, and more.

• 8086 Multiply Algorithm Gets Reverse Engineered

  The 8086 has been around since 1978, so it’s pretty well understood. As the namesake of the prevalent x86 architecture, it’s often studied by those looking to learn more about microprocessors in general. To this end, [Ken Shirriff] set about reverse engineering the 8086’s multiplication algorithm.