- WiFi + Bluetooth - Onboard antenna - Battery charging - USB-C - Handful of GPIO - Castellated pads - Affordable - Smol I've been looking for this exact thing for so long and thought I was crazy when I couldn't find a good solution. Thank you Carl!!
I've only ordered a few PCBs from you guys over the years, but I really appreciate you sponsoring makers :) Whenever I need a PCB, you guys are my go-to company to order from!
You should really put in your video that you can save up to 45$ in shipping by not adding on the battery. I took it off and it dropped the price from 90$ to 40$ which turns the product from kind of stressing pricing to actually very reasonable for a research device. If I buy a lipo locally on amazon I can get like 20 of them for that markup.
This is almost exactly what I was looking for (a small ESP32 board with battery circuitry and an IMU in a tiny package). The only missing thing would be ZigBee instead of power-hungry WiFi. Please cosider selling a ESP32-C6 and/or ESP32-H2 equiped version. They should both work as drop-in replacements for the ESP32-C3 without requiring any change to the PCB whatsoever. It could even be an option on the website like the IMU is.
@@WhatsTheWordBozo Maybe I'm wrong, but I believe they have BGA-like pads to solder under the module itself, instead of just castellated contacts on the edges. If that's the case, it would be way beyond what my soldering skills and equipment are capable of 😅
@@qdaniele97 But then they wouldn't be drop-in replacements! BGAs and other SMCs can in theory / in a pinch be done in a household convection oven like the one used for turkeys on thanksgiving (not to be confised with a microwave, haha). Just be double super extra sure everything is lead-free etc esp the solder paste.
as student major in EE, i can confirm that srinking a controller board to the absolute smollest while still keeping many features is not only impressive but it's the most cutest thing i've seen i'm currently geeking out rn
This looks perfect for a DIY motion suit, I wanted to design a board like this for ages, 30eur per board is pretty good considering how feature packed it is, data could be streamed & synchronized over ESP-NOW. Awesome!
OMG, cries in poor :), I was able to buy one, but it ended up being 60€ in total, whyyyyy am I so poor :) Edit: you still deserve 6 stars for this crazy project +1 Edit2: I just bought one with giro, I have no self control eheheh
unfortunately to ship the battery we can only use fedex box, which i agree is a bit expensive.. but is necessary to ship LiPos.. All other options can ship with international post and also include a wire to use your own battery :)
I wish you could've squeezed some motor drivers or just mosfets on there for direct motor drive. (4 mosfets and you would've had yourself a mini drone!)
I literally had this same exact board (bit larger same BNO08X sensor) ready for pcbway and i come across this video. Unbelievable, i bought 3 can't wait to get them.
So well done! Having followed your channel for a while now, I can be confident that this board is well-designed. By the looks of it you've already prepared super nice examples for it too. That's an easy buy. Congrats, hope this does well for you.
This could also be interesting for SlimeVR Body Tracking since it supports the ESP32-C3 and the BNO085. However i could not find the shematic so i don't know if the wireing would work with the default firmware. UPDATE: I just saw that the pins can now be configured in the SlimeVR Firmware tool. So it should work.
How didn't i see this in these 2 weeks? I needed a small, compact, battery powered board with motion sensing capabilities, it's insane how much stuff is packaged in here!
You have no idea how many of these are going to sell. I've seen so many mini RC tutorials around that have 500 steps and parts/tools. This is a game changer
Hey Carl. Im the same Seth that hit you up a while ago about using drivecells in my small robotics project. Thanks for responding and talking with me. The new drive cell library is much better.
wonderful project! if you rotate the c port 90 degrees and make it exit like the battery connector? this would increase the thickness but give you more space on the board. Another thing I thought of was putting a small piece of flat cable so that the c port could be rotated
2 weeks ago I bought a bag of 20 ESP32 C3 Super Mini for less than $15 total, shipping included. I hate to not support creators because you did put a ton of work into it and I can see it in the final product. But I apologize, for throwing a ton of sensors around the house with ESPHome, I'm sticking with these little guys. Much love though, your projects are always top notch 100% amazing, keep at it!!
Looks amazing, as all of your projects. I am just worried that the PCB antenna might behave poorly. ( esp32 has a very small range when connecting to other ESP with PCB antenna.)
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I like external antenna because then i can place electronics on alu or steel sheet if need be and don't need to worry about occlusion/detuning so much, more flexibility. USB cable only a little attenuation because the metallisation is barely a couple millimetres across, which is a lot less than 29mm.
The XIAO ESP32C6 is the same size as the C3 and has an internal antenna in addition to a connection for an external one. And it has zigbee, which could be convenient for power usage.
This seems pretty interesting as a SlimeVR tracking puck! Unfortunately the ESP32 isn't efficient enough to work off a small battery, but if this used an nRF52840 instead it could use the experimental SmolSlime firmware and last weeks! (although the nRF doesn't have wifi, it has BT, Thread, NFC, and more) The BNO085 is the same IMU used in the official SlimeVR design, but now the cheaper LSM6dso or LSM6dsv (dsv is the newest) are becoming new favorites. They're much more power efficient and apparently about as accurate if not better. They don't have magnetometers, but usually the BNO085's isn't used by the Slime software anyways
Makers tend to forget that they use **development** boards in their final designs. You didn't "design another one" you just integrated the MCU in your custom design. As you're supposed to do.
thanks! that's the only missing thing on it! its not bad but the onboard addressable led isn't sleep current friendly - its impossible to fit but if there's space i'm going to try and add for v2 if it ever gets there 🙃
I think this is exactly what many were looking for. I will take some. However another downside of the USB C port location is that it might be a bit inconvenient to make it accessible when printing a case with a 3d printer
so far i've built multiple cases for different projects and i have to agree.. but it a small inconvenience considering what it packs in such a small area..some clever 3d design can also make it easier for the usb connector to be more accessible through the housing
Great work as always. What about cutting the PCB antenna and soldering it in vertical? I don't know if it invalidates the FCC compliancy (probably yes), but it will make the size smaller, solve the connected usb port issue and also be high a little more of the usb port itself. 🙂
So much features in this tiny volume, you did a really nice job Carl ! Even took the time to do a pretty nice animation for the intro ! What did you used ? Blender ?
i like that you went with an ESP32, BUT i don't love the C3. The S3 is a real successor to the original ESP32, whereas the C# series come closer to an ESP8266 IMO. Still a decent MCU though
For battery applications, it would be interesting to know if the integrated sensors can bring the ESP out of sleep mode? Can the VCNL4040 light sensor or the BNO085 motion sensor do this? thx
Very cool! But I still say that you really need to design a Cozmo that has a brain. I so much want to have a small robot that can roam around the house indexing new items and even be able to take small items back to its' home base.
Yep, chrisrose708 is correct. A final device needs to be certified to FCC CFR 47, part 15 if it has an oscillator above 9kHz. The scope of testing is reduced if you use a certified wireless chip. I had EMC testing performed on a device about 2 years ago that uses an ESP32 chip and the testing and report cost about $2,100.
@@AverageJoe928 Is it easier because the part that isn't certified yet isn't an _intentional_ oscillator, or is there some extra advantage to having components that already went through certificattion?
Was thinking of using it as the board for a smartwatch to test stuff before designing my own board. How efficiënt is the battery stepdown? Efficiency would be the most important requirement
hi carl, nice video.. can you tell more about the charging chip with power path mangement, i want to desig a charging board for li ion cells with 4-5 amps of charge current, single cell...
Thank you Carl for this great content once again ! I would like to drop a question because I'm kind of curious here. How do you make a living ? Is this channel a hobby project or main job ? Regards, kyf
