u/Particular-Award118

Am I out of touch here? Looking at the spec sheet the Zero is set to use a 1500 mAh lipo. Cardputer ADV battery is 1750 mAh. ESP32s are known for their very low power draw while the Pi Zero draw will be significantly higher while the battery is worse? I understand they have larger hardware shoved into the card form factor but couldn't they work around the size issue with better chemistry? Is this that big of an ask for a $150 MSRP product?

In fairness I should point out that the the Zero is going to take up considerably more room in the chassis where the tiny M5stamp ESP is out of the way entirely, so maybe they did have to go way smaller on battery size and pushed the limits with chemistry to get to 1500 mAh. With that said, I obviously don't speak for all cardputer users here but I'd gladly accept a little extra thickness for an improved or even identical capacity as the ADV. I love the product line but that love was earned by impressive product shoved into a small package, and fanboying never helps the consumer.

Going for a GPU centric build with 64GB VRAM using two Radeon AI Pro R9700s. This is my current bill of materials, any input, experience, or suggestions are encouraged.

PART PICK PRICE
GPU 2x ASRock Radeon AI PRO R9700 32GB $2,700

CPU AMD Ryzen 5 7600X 6C/12T $168

Motherboard ASRock AMD X870E Taichi Lite $300

RAM Corsair Vengeance (2x16GB) $401

PSU MSI MPG A1000GS 1000W PCIe5 $133

SSD Acer Predator GM7 2TB Gen4 NVMe $290

CPU Cooler Thermalright Peerless Assassin 120 SE $33

Case DARKROCK Classico Storage Master $90

TOTAL $4,115

Cost is not an object here, I haven't been able to find a real answer to this specific question. I need the smallest possible 3W speakers (as thin as possible as this is the main constraint) that have decent fidelity. I have some 1W speakers that fit perfectly into my build at 15x10x3.5mm but they're predictably pretty cheap/bad.

I've been using ESP-Now on Cardputer ADV for RF-based telemetry between the Cardputer and my pc running a local model. Very cool use case at indoor range but when looking into LoRa modules to expand my range I made a dumb uninformed purchase due to a misleading online listing claiming these 433MHz modules were "FCC certified." Problem is I live in the US and the telemetry is quite spammy during a convo + I intended to send/receive encrypted packets.

Aside from the math of how slow the communication would actually be, are these 433MHz modules going to be guaranteed DOA for me? I also considered dropping the local model telemetry altogether and just using it for texts to my brother. Am I being dumb trying to not waste the modules or should I just eat the loss and switch to 915MHz for texting? Am I being paranoid or would using 433 actually interfere with ham radio enthusiasts or have feds show up at my door if I'm sending intermittent encrypted packets?

I am interested in building a Helmholtz coil pair but have been having quite a time trying to engineer a strong enough field. I'm shooting for 500 Gauss minimum but even that takes an insane number of turns or current and small radius, and considering the radius needs to be to the center of the wound wire I'm cutting into my usable spacing distance. At this point I'd love to find someone who has made a strong coil pair with decent room to actually use it. If I'm barking up the wrong tree with Helmholtz coils, I am also looking for suggestions of alternatives, (strong uniform magnetic field of ample radius, no gradient.) Any input is appreciated!

Obviously plants pay process engineers handsomely for the inherent risk involved, but where should I be looking for high risk high reward jobs as a researcher halfway through their PhD?