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PCB devboard the size of a USB-C plug

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Re: PCB devboard the size of a USB-C plug

#3

Post by throwaway81523 »

chrisallick wrote: post #2

This looks awesome, I'd love to get one. Question, what's the advantage over something like the ESP32C3 and the like? Just even smaller?

It's a much less fancy cpu that's very small. No wireless. Lower powered I would expect. But it's an MCU with something like 16KB of flash and 2KB of ram if I remember right. The analog stuff on it is supposed to be pretty good. The Anduril flashlight firmware (toykeeper.net/anduril) is a somewhat popular application that can run on it.

Re: PCB devboard the size of a USB-C plug

#4

Post by rkagerer »

chrisallick wrote: post #2

This looks awesome, I'd love to get one. Question, what's the advantage over something like the ESP32C3 and the like? Just even smaller?

If it helps, I've used earlier Atmel AVR chips, as well as the ESP32-S3.

8-bit AVR is an extremely clean, relatively simple instruction set that can be viably hand-coded. It's fairly straightforward to calculate the exact number of cycles your code will use, which is handy for applications requiring deterministic timing and for knowing worst-case execution time of interrupt handlers.

If the C3 instruction set is anything like the S3, I'm willing to bet it's not as straightforward.

Atmel also tends to do a better job of their documentation. I've lost count of how many confirmed errata I've reported to Espressif, and the time (and steam) I lost troubleshooting them in the first place.

I like the S3, and it's heaps powerful, but for small projects that don't need advanced peripherals like Wifi, DMA, etc. I can envision that AVR as being a fine choice.

Re: PCB devboard the size of a USB-C plug

#6

Post by tgsovlerkhgsel »

throwaway81523 wrote: post #3
chrisallick wrote: post #2

This looks awesome, I'd love to get one. Question, what's the advantage over something like the ESP32C3 and the like? Just even smaller?

It's a much less fancy cpu that's very small. No wireless. Lower powered I would expect. But it's an MCU with something like 16KB of flash and 2KB of ram if I remember right. The analog stuff on it is supposed to be pretty good. The Anduril flashlight firmware (toykeeper.net/anduril) is a somewhat popular application that can run on it.

> Lower powered I would expect

With the right software, ESP32 can be incredibly low power. Like "months on 3xAA batteries" for watching a pin with the ultra low power subsystem and then occasionally waking up and making a HTTPS call over WiFi.

Re: PCB devboard the size of a USB-C plug

#8

Post by pcdoodle »

tgsovlerkhgsel wrote: post #6
throwaway81523 wrote: post #3

Earlier quoted context omitted.

It's a much less fancy cpu that's very small. No wireless. Lower powered I would expect. But it's an MCU with something like 16KB of flash and 2KB of ram if I remember right. The analog stuff on it is supposed to be pretty good. The Anduril flashlight firmware (toykeeper.net/anduril) is a somewhat popular application that can run on it.

> Lower powered I would expect With the right software, ESP32 can be incredibly low power. Like "months on 3xAA batteries" for watching a pin with the ultra low power subsystem and then occasionally waking up and making a HTTPS call over WiFi.

[dead]

Re: PCB devboard the size of a USB-C plug

#10

Post by rolph »

george_max wrote: post #7

Very nice. I am wondering -- why have a devboard this small?

...trust me this is the best USB cord ever try it out for free, ill sell you some cheap if you get a couple friends to buy some.

https://shop.hak5.org/products/omg-cable

https://phreakboutique.com/blogs/tutorials/using-your-new-ev...

thats how the grift starts...

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