51–60 of 72 posts
Question for the people who have used the CH32V003 or more generally WCH, either for hobby or production, what is the current state of documentation and toolchain for these chips? Positive experiences, war stories?
I had to put in more effort regarding RAM use and flash size, but I managed to fit a game into the 16kb limit regardless: https://github.com/kpcyrd/game-streetcat2026
We just launched https://stasis.hackclub.com, another similar electronics program.
If you know any teens that want to get into PCB design, please encourage them to join Hack Club and these programs!
Does anyone here know the reason why Pcbway stopped accepting credit cards? My colleague asked them but I recall there wasn't a clear answer. It is puzzling why they would make it harder to do business with them from outside China. Jlcpcb doesn't have this problem.
But I just checked and it seems that they now accept CCs again.
I dream of an open board like the yubikey nano. This is very nice!
They're seriously tiny; basically answering the question, "What if mechatronic prototypes didn't need to be the size of an Altoids tin?"
Earlier quoted context omitted.
That's not lower power, is it? E.g. RuuviTags can run 3 years or longer while sending sensor data 2.5 times per second, with a single CR2477 (3V 1000mAh). A single AA alkaline battery has 1.5V and 2100-2700 mAh ( https://batteryskills.com/aa-battery-comparison-chart/ , somehow this data was difficult to find so I'll add this link :)). Bluetooth is lower energy than WiFi, but in your scenario the energy used for the r…
nRF52832 are famous for their low energy usage, it's hard to compete with them. However, ESP32 is much more universal.
Best practice is to have a completely opto-isolated USB connection between your dev system and test hardware. You can buy a USB opto-isolated system for like $100 that will tell you downstream currents and isolate your hardware.
TIL about "Charlieplexing", or how to use a reduced set of pins to drive a matrixed set of LEDs. https://en.wikipedia.org/wiki/Charlieplexing
That's going to be funny when you try to make a photograph on a short shutter time. Half the display will be off!
Just be aware of dorking around with exposed hardware connected to your $2K MBP. If you end up shorting out your DIY circuit, or have external power supplies connected to your dev board, it's very possible you can fry your laptop. Best practice is to have a completely opto-isolated USB connection between your dev system and test hardware. You can buy a USB opto-isolated system for like $100 that will tell you downstr…
I dream of an open board like the yubikey nano. This is very nice!
A founder I know is making reduced-pin Arm-based prototyping modules: https://www.bergsonne.io/ They're seriously tiny; basically answering the question, "What if mechatronic prototypes didn't need to be the size of an Altoids tin?"