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Written by jiub :v_enby: :v_trans: :v_est: on 2025-01-26 at 05:56

the newer hobbyist microcontroller like the esp8266 or rp2040 are wild because you can have 32-bit cpus, sometimes with multiple cores, running at over a hundred mhz combined with like 264 kb of ram

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Written by doskel on 2025-01-26 at 05:57

@jiub the esp32 scares me

wifi, bluetooth, 4mb of storage, dual core cpu at like 240mhz, dedicated cryptography hardware, all for four dollars???

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Written by jiub :v_enby: :v_trans: :v_est: on 2025-01-26 at 06:01

@doskel@masto.doskel.net it's so wild that you can get so much for so cheap! i'm figuring out all sorts of dumb stuff to do with these lol

my favorite is how the rp2040 has enough power to drive DVI (which HDMI displays are usually compatible with) in software and still have enough CPU power left over to run an NES emulator

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Written by doskel on 2025-01-26 at 06:03

@jiub i can hold a little pcb in my hand that is capable of running text to speech in real time while driving a display and being connected to a wireless network and compressing and streaming audio to a bluetooth headset and draw <100mA

HOW

HOW DOES THIS WORK

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Written by Aaron Sawdey, Ph.D. on 2025-01-26 at 06:41

@doskel @jiub esp32 is pretty awesome but at the very bottom end you can get arm micros with a few k of memory and flash for $0.25 .. which is cheaper than 74xx logic these days 😂 (yeah I know, 74xx is ancient and uncommon but still)

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Written by wyatt on 2025-01-26 at 05:59

@jiub "wild" is one way of putting it

i call it "lame/boring"

i want computers that make me question everything i know about computing

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Written by doskel on 2025-01-26 at 06:05

@wyatt @jiub these chips make me question everything i know about reality much less computing lmao

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Written by tom jennings on 2025-01-26 at 21:13

@jiub

Yeah it's nuts. Mostly I do realtime control crap, driving hardware, so it's pins pins pins. Current fave is teensy 4.1, 600mhz arm, mega byte ram, 40 pins. I stuck with Arduino mega2560 til recently cuz pins pins, and for control 16mhz is often still fine. Pins pins pins PID loop.

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