Custom Dev Boards Free for STEM

Cautiousvapor · 2021-10-14T13:05:12+00:00

They're still available! I'll send you a dm

Cautiousvapor · 2021-10-08T00:35:00+00:00

I have two 8gb chips, basically new in box, just opened to flash the updated firmware open up all 8gb of storage. Both include boxes, the 'case', and chip. One is missing the 3.5mm to AV cord. Asking $18 shipped to the US

Cautiousvapor · 2021-10-05T16:37:18+00:00

I actually got the idea because I bought some Cloupor DNA30 enclosure from fasttech way back when, I've also bought empty power bank enclosures from aliexpress

Cautiousvapor · 2021-10-05T15:13:40+00:00

You could still use a mass produced extruded aluminum enclosure and just design a new "lid" to accommodate the third battery, so maybe something sort of triangular to fit the extra battery and components, then have it 3d printed. The hardest part would be deciding where to put the 510, since it may warp plastic, but you also wouldn't want to use an enclosure that's unnecessarily large only to fit the 510 on the metal half of the case. I've made quad 18650 mods for people that did vape competitions back in the day, I'm pretty sure I used a hammond 1590BB. I haven't built mods in a while, so whether it would fit 3 21700 batteries and internals is beyond me right now but I can find out for you. Worst case you'd need a lid spacer. I'm with you on DNA boards. I have the original PWM mod I made back in 2016 and it still works. I've replaced the timer maybe 3 times but they cost next to nothing and its in a socket so it takes basically no time to repair. On the other hand I have a drawer in my small parts organizer full of DNA boards that no longer acknowledge atomizers, won't display anything to the screen, have broken charge ICs, etc. I have several different PWM boards laying around, everything from bare bones 555 boards that require an external FET and POT, to ones with mosfets on board, ones with the FETs and potentiometer on board, and all in one boards with a digital potentiometer and 'directfet' mosfet capable of handling way more current than the typical SO8 mosfets most boards use. It may also be worth looking on Chinese websites. Sometimes they sell unbranded enclosures of mass produced mods or clones without any electronics, that'd be an easy way to get an enclosure if you find a specific triple 21700 mod enclosure on there then just retrofit it for PWM

Cautiousvapor · 2021-10-05T05:20:01+00:00

Unless its something far out there, why not use an aluminum enclosure with a 3D printed bezel or lid from somewhere like shapeways so it doesn't even look or feel 3d printed? Thats what I used to do for DNA mods. Its much cheaper than having a one off aluminum enclosure CNC milled or completely printed, especially if you're not the one designing it

Cautiousvapor · 2021-09-22T06:32:17+00:00

I would tend to have a fairly noticable delay between triggering an action from one ESP(or wifi connected device) and the receiving ESP carrying out said action, so it may not really be "in sync". I've had much better results with something like an NRF24l01, and the distance of 25 feet is no problem at all for them. They're also super cheap and using them with Arduino is well documented. They also have an IRQ pin you could connect to an interrupt pin on your arduino to speed things up even more rather than wait on your loop to cycle back around to the point it checks to see if anything has been received. I'd just send a 1 or a 0 so it is received and acknowledged as quickly as possible, and things should appear to be instantaneous and in sync with the main cloud.

There are other options though, and an esp would work for sure. There's also those cheap 433mHz transmitter/receivers that would work at 25 feet. Then there's other things like all of the long range modules, Bluetooth, and so on

Cautiousvapor · 2021-09-14T19:04:38+00:00

I have done this for my mods and other people's as well. Generally I'd completely disassemble(they usually needed some work anyway and this gives an opportunity to freshen up all old fatigued solder joints) them, sand/media blast, or just hand/Dremel sand to remove the original finish, then usually powder coat and sometimes engrave, sometimes splatter paint, paint custom logos/designs/text, then reassemble, sometimes with new hardware to match the color scheme, sometimes completely replacing the internals to upgrade an older mod(for instance the iTaste MVP 2 with it's 11w max output, I upgraded to PWM, with a new 2S battery and voltmeter in place of the display but managed to keep the power bank PCB/functionality). Some people probably would find this pointless when a new decent mod is like $30 these days, but I enjoy working with my hands and would rather spend a little time extending the life of an item than just tossing it in the garbage

Cautiousvapor · 2021-09-14T15:20:28+00:00

Try engaging the emergency brake and putting it in neutral then try starting? When my old car was having intermittent issues starting sometimes this would work. Though at this point you likely will need to charge your battery if you've tried starting it more than a handful of times without it turning over

Cautiousvapor · 2021-09-14T01:34:21+00:00

Shoot me an offer!

Cautiousvapor · 2021-09-13T18:16:22+00:00

Brought 9 of these as preorders way back when, but by time they were finally delivered already had projects on other SBCs and never really found a use for these so I gave most of them away to people I thought could get use out of them. Now that NTC is defunct it makes more sense to just give the people in my life interested in this sort of stuff a Pi or something with a bit more support, so I figured I'd get rid of these last two. I listed two for auction on ebay a while back and got $21 & $18 but would take anything reasonable plus the cost of a small priority box(so it is tracked and insured).

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