We made an open source ESP8266 dev board for makers

Post by konschubert » Fri, Sep 18, 2020, 6:54 AM UTC

StavrosK wrote: post #81

konschubert wrote: post #75

Earlier quoted context omitted.

I am sure this is something will be able to answer: I need to build a custom board for an ESP32 which should support low-power deep sleep and which should contain some additional circuitry (is that what you call it?) to drive an Eink display. Basically this[1] board, but a different shape and better low-power sleep properties. If I wanted to design this board myself, how long would it take to learn this? Are there go…

Have you already made the circuit on a breadboard? If so, learning KiCAD and building the board from scratch would take around a week of afternoons. I really recommend it, designing PCBs is very enjoyable (at least to me).

Post by peterburkimsher » Fri, Sep 18, 2020, 7:02 AM UTC

tesseract wrote: post #49

iancmceachern wrote: post #45

Earlier quoted context omitted.

I wonder how the folks that sell on Tindie get around this... https://www.tindie.com/

There are various exemptions for subassemblies and other non-end-user products. Those may not always apply. However, in practice, a product that's sold in small quantities and does not in fact emit egregious electromagnetic interference is unlikely to attract enforcement attention. So a fair bit of skirting of the rules does go on.

Post by peterburkimsher » Fri, Sep 18, 2020, 7:03 AM UTC

alacombe wrote: post #73

peterburkimsher wrote: post #36

Earlier quoted context omitted.

This is the exact reason why I didn't see through my plan to build and sell the EspUSB (a very small ESP board that fits inside a USB-A port). I got 3 units built for myself by PCBWay at a cost of $77. I got quotes of ~$500 for 100 units from Elecrow and Makerfabs, but didn't know what to do with the other 90. Although I really want this great little gadget to be easily available, I can't afford $10,000 for FCC certi…

> I can't afford $10,000 for FCC certification, and therefore I have no solution. That's not how it work. You start by selling them, prove the concept, and when you have the money, you sort out certifications & whatsnot. You won't become a unicorn if you think about doing everything _by_the_book_ from day one.

Post by bonzini » Fri, Sep 18, 2020, 7:30 AM UTC

konschubert wrote: post #75

sowbug wrote: post #51

I built something like this but more special-purpose. It just switches a USB-A power source on/off. I wanted it to control my 5-volt fish-tank lights. I didn't want to use a 120VAC smart switch for each light because I prefer to use a single USB hub to power them all, and a bonus feature was being able to PWM the lights so the fish aren't freaked out when the lights suddenly turn on 100% in the morning. I ordered PCB…

I am sure this is something will be able to answer: I need to build a custom board for an ESP32 which should support low-power deep sleep and which should contain some additional circuitry (is that what you call it?) to drive an Eink display. Basically this[1] board, but a different shape and better low-power sleep properties. If I wanted to design this board myself, how long would it take to learn this? Are there go…

Post by gspr » Fri, Sep 18, 2020, 7:51 AM UTC

antoniuschan99 wrote: post #58

snarfy wrote: post #48

Earlier quoted context omitted.

Yeah, I'm regretting getting the esp8266 not knowing of the esp32. Besides being a better device for basically the same price, it has better tooling from espressif.

Esp-idf is amazing . Esp8266 doesnt have flash encryption and secure boot. Esp32-s2 does though.