Hacker News: emctechhttps://news.ycombinator.com/user?id=emctechHacker News RSShttps://hnrss.org/hnrss v2.1.1Tue, 07 Jul 2026 00:58:38 +0000<![CDATA[New comment by emctech in "1.38 Millimeter Microcontroller"]]>You are right. I am just a little salty that it took them so long to have the smallest package available.

]]>Wed, 01 Jul 2026 07:04:21 +0000https://news.ycombinator.com/item?id=48743209emctechhttps://news.ycombinator.com/item?id=48743209https://news.ycombinator.com/item?id=48743209<![CDATA[New comment by emctech in "1.38 Millimeter Microcontroller"]]>very cool!

]]>Tue, 30 Jun 2026 01:37:36 +0000https://news.ycombinator.com/item?id=48727577emctechhttps://news.ycombinator.com/item?id=48727577https://news.ycombinator.com/item?id=48727577<![CDATA[New comment by emctech in "1.38 Millimeter Microcontroller"]]>I don't have a blog post up about them yet, it is in the works. The website is active though: https://www.reactiv.au

]]>Tue, 30 Jun 2026 01:27:14 +0000https://news.ycombinator.com/item?id=48727520emctechhttps://news.ycombinator.com/item?id=48727520https://news.ycombinator.com/item?id=48727520<![CDATA[New comment by emctech in "1.38 Millimeter Microcontroller"]]>Thank you! I want to try and sell them but I just have a few bugs to squash and to finish off the mechanical design of the charging cradle.

]]>Mon, 29 Jun 2026 09:17:14 +0000https://news.ycombinator.com/item?id=48716813emctechhttps://news.ycombinator.com/item?id=48716813https://news.ycombinator.com/item?id=48716813<![CDATA[New comment by emctech in "1.38 Millimeter Microcontroller"]]>I have a fourier transform loop running on this micro which takes 64 samples and outputs 32 frequency bins. It works perfectly for generating inputs to algorithmically driven animations including a visual audio spectrum frequency analyser.

]]>Mon, 29 Jun 2026 09:16:16 +0000https://news.ycombinator.com/item?id=48716801emctechhttps://news.ycombinator.com/item?id=48716801https://news.ycombinator.com/item?id=48716801<![CDATA[New comment by emctech in "1.38 Millimeter Microcontroller"]]>And for people saying it is low on RAM and flash, you need to understand this is a low cost micro. You can also do a lot of work with a small amount of RAM by managing your memory manually. Through the use of C unions I have about 3kB worth of variables that get switched in and out depending on the mode we are in. I have enough space to record analog audio samples and perform a fourier transform over the samples and use the generated to data to drive algorithmically generated animations on the LED array.

]]>Mon, 29 Jun 2026 09:12:03 +0000https://news.ycombinator.com/item?id=48716753emctechhttps://news.ycombinator.com/item?id=48716753https://news.ycombinator.com/item?id=48716753<![CDATA[New comment by emctech in "1.38 Millimeter Microcontroller"]]>This line of micros has been out for almost 2 years now but they only just took the 1.38mm^2 package out of pre-production. I started a design last year of a tiny earring with ~102 addressable LEDs on it, a microphone, a bunch of supporting circuitry and this micro. https://i.ibb.co/JWh57LLw/IMG-20260408-183807502-HDR.jpg Unfortunately by the time I was ready to order the boards I found the tiny package was unobtanium and had to resort to the second smallest package which isn't very small. Frustration!

Not worth changing the design now...

]]>Mon, 29 Jun 2026 09:01:45 +0000https://news.ycombinator.com/item?id=48716677emctechhttps://news.ycombinator.com/item?id=48716677https://news.ycombinator.com/item?id=48716677