Affiliated links for the things in this video Mini Hot Plate - amzn.to/3RnFTga iFixit Tweezers - amzn.to/3Rr1ILZ Low temp solder paste - amzn.to/3uBbH8e high temp solder paste - amzn.to/4a3Spsl Join my discord - discord.gg/pc7cSxwzj3

If you want a slightly more functional challenge. Try putting the 'fingers' for a USB type A directly on the PCB so you can insert the entire PCB into a USB port, I've seen some bluetooth dongles do this.If you squeeze a WiFi antenna on there as well you'd have a pretty cool ESP-now receiver - could make for a pretty low latency wireless keyboard receiver or something like that.

You can easily ditch the reset button without any caveats. Just hold the programming button when inserting usb cable.

Use flex PCB and make the back side as USB-A contact, after solder make a mold the size of PCB and fill the component side with acrylic. Use the ESP8685 not the C3 (and not ESP8285 either), it's basically the C3 but in 4x4 mm QFN package. Some decoupling capacitor can be omitted, the same with resistors on pin 2 and 8. You don't need a BOOT switch when programming using USB-CDC, and you can just power cycle the thing in case of RESET switch, so both can be omitted.

Very nice little board. I'd remove the USB connector, buttons and possibly the LED. Instead if you put a U/FL connector for the antenna and a small board connector such as the Hirose DF40 series (a 20 pin is only 6.6 x 3.6mm) then far more GPIO could be broken out. Would need a seperate programmer board with the USB and reset buttons, but once programmed you'd have a very tiny board that could easily be integrated into other projects with only 1 connector and an antenna.

This is great - I thought I'd gone small with my latest boards, but I see that I have to try harder!

Loved the close up shots of you populating the boards. Nice project, thumbs up and subscribed.

Delete the USB connector and make the board directly plug into a female USB connector like a cheap USB thumb drive.

Simply wonderful, that's an elegant and compact ESP32 design, thank you!

Even smaller would be castellations for GPIO, SMT pads for power, and a picoblade connector with USB breakout board. You could probably fit a battery charger where the USB connector used to be. You could also potentially fit a U.FL connector for wifi.

I guess you could push the footprint size even smaller by stacking the switches (using through hole) over the top of some of the other components.....🙂

You can also pullout i2c pins for further expansion.

would be interesting to tweak the design to have: power, SPI pins, and one of those tiny antenna jacks; that way it's mostly full featured

Well done, that's a pretty cool project. Cheers for sharing!

Super awesome build!! Really cool to see you shrinky-dink the ESP32, even if it doesn't do BLE or WiFi

I've been wondering how small of footprint a wifi enabled rs232/wifi adapter could be made. Id love to see that.

This is really cool. Thankyou for sharing, great vid!

Very nice work. Couldn't you have the PCB manufacturer place the components for you?

Awesome. Looking forward to the third revision!

Nice board! I guess u can improve this if u going to use multi layer pcb, this way u can integrate wifi antenna on the board and also u can break out more pins like that! Keep up, im interested how u done the next version as well, so i subbed!

looks great for model rockets or air craft

The challenge was great. I watched it with pleasure. Anyway, what I want is to add an sx1262 lora chip to this structure. Let's see if it will be the way I want it to be. I think the important thing is that it has an esp32 s3 centered structure (with sx1262 lora chip) and supports both arduino ide, esp idf and microphyton infrastructure. I think having so many programming infrastructure options will greatly increase the popularity of these boards. Especially if you consider the difference between the ESP version supported by the Arduino IDE and the version of the ESP IDF, you can understand what I mean more easily. This type of board will be extremely functional in education. In short, for example, it is a module structure that connects an sx1262 lora chip to esp32 s3 fn8. Esp32 should be designed to keep the GPIO pins active as much as possible. In a sense, think of it as a module. Then I think that this structure can form the center of many training sets.

Wow. I am new to all this arduino and esp32 stuff as I just started a month ago but that is the coolest thing I have seen done to the esp32. Does it still have its ble capabilities and will you be sharing the schematics for the PCB. I would love to play around with it.

Excellent build! Have you considered a connector other than USB-C? Maybe JST has something which would work. For WiFi, how about the ceramic antennas that Adafruit and Seeed use on the QTPy and Xiao series of boards? It would make your board larger, but not by much. Obviously this would be for another project where you aren't going for minimal space.

Try to add a little SMA connector for the wifi antenna. So you save up the space and have WiFi supported

So proud of you!

Crazy man - makes crazy things. Amazing project

It’s so cute! Great job!

Awesome! Add the ant with TINY packages and pogos instead of USB. @ D: I believe a design guide would be SWEET.

maybe get rid of buttons all together and put just tiny pads that you can connect with screwdriver if you absolutely need to.

Wow!😯 Great project.

I got my formal electronics education beginning in 1980. After all these years, I'm still convinced its magic. Very cool design. Thanks for the video.

You could use use a male usb A pcb connector like some attiny85 designs do. You could only use one pcb site but you are not limited by the footprint of the usb micro port

Small enough to place inside a computer as a key logger or inside a USB connector ..pretty dam tiny

Great Video, thanks for sharing this

Really awesome and inspiring, thanks for sharing.

Incredible! I'm actually designing a business card using the same ESP32-C3 with the built-in flash! Epaper as display, wifi, RGB LED and even temp/humidity sensor : it's gonna be great!

Great Project Man 💪

Just think... replace the usb-c for contacts for use a jig with pogo pins to programing and a small conector for a tiny battery, it's a option? And for antenna, probably won't work, but you can put only de μC on one side, make a space for a connector for the antenna or... take all the risk, create a thin pcb for stackup at side of μC to save the space and have the antenna in separate pcb

It would be great to see this with the smaller components (replace the reset button with antenna connector) ... postpone your morning coffee until after populating the board ;-)

If you make it even smaller, then maybe could me more space to add the bells and whistles back in?

I would change the pads for a flat cable connector so it can be actually useful haha Cool project tho

I know it would make it slightly bigger, but to increase the usefulness of this you could break out the two GPIO for I2C maybe instead of the one pin that you originally chose? New subscriber by the way. I love what you did with this.

So what kind of Bluetooth range do you get without an aerial.

Amazing work!

I agree with the usb male "fingers" but remember you can also space out the connections to make it type 3 compatible. And with the extra space for the USB on one side, you might as well move the antenna to the other side. Another space saving constraint would be to put those castellated half holes. And maybe break out a few GPIO on the sides with the half size holes

You could even ditch the USB port and just use TX and RX pins!

is it possible to make something like LokSound 5 decoder for controlling light and sound and dc motor which can be controlled over wifi with esp32

Is using an oven the best (only?) way to solder the second side of a board with surface mount components on both sides, or could you have used the hotplate for both sides?

Do you NEED buttons? 😊

I was reminded of the even smaller ESP 8285 based ExpressLRS PP RX when I saw this 😅

Could you put a PCB Trace antenna for the WiFi on an internal layer? say as part of a 4-Layer design? Sure it won't be the best reception being burried in FR4 but it's better than no antenna at all?

I'd like to see a tiny ESP32 with 1mm pin full break out, canbus, USB, battery...all the stuff you usually get on an ESP32 breakout board. Antennas don't have to be on the surface of the board. You are already multilayer. Map them out so they are on the edges and internal. This tiny project is pretty cool, but to get it so tiny means seriously limited use!

honestly you could fit that thing into a charging cable and turn it into a badusb, its so tiny

There is a manual cmd component installer based on pantograph mechanics. Remarkably eliminates hand shaking!!! The mechanics can be assembled by yourself out of common junk, even out of wood!!! there is no need for high precision.

could you remake this with spi broken out ? I would love to have somenthing small that I could use in 3d prints... ( even if it is a bit bigger than this...)

Where did you source that esp32? It looks like the pico d4 form factor but it's not?

Excellent sir ❤❤ Big fan Is this board contains WiFi facilities also Please reply

you could make touch buttons and initioally connect them with a wire to falsh the chip but if you would make the edged conductive you could fit etleast 4 touch pads on there :D.

Use smd antenna that is on the esp32 c3 mini dev board, no need of buttons just expose two solder pads and any tweezer can be used to trigger flash, I could argue that microusb port can also be ditched and temporary wire solder or some hacky 4pin alligator style clip can be used to program it but it might trigger some people, Also check deep sleep as you used your own schematics and different capacitors can cause rise/fall timings on rst pin to change and make deep sleep unusable

That's absolutely something I want to see!

Check out the expressLRS boards that are super tiny to get ideas for adding a ceramic or SMD antena * could just stick a smd connector for the antenna also … the FPV ones have a nice solid type like the MMCX but normal ones are even smaller … lol this is nice though, but you could get whompy with it and try and stick the ceramic antenna / connector on the Z axis ( side ) of the pcb, depending on how your routing the pins you could use a FPC connector from like a cellphone or whatever to break out them gpios

Add external antenna to it with i2c pins

Very cool, could make an esp a 4 pin i2c module hah

It would be really useful to have such a tiny board with wifi. I think the SMD antennas can be pretty small. Maybe it would fit if you ditch the reset button.

I think you could get an antenna in it, if you use a multi-layered pcb.

You could ditch the usb port for test pads.. and with mini pogopins a custom connector to Program it :D

merci beaucoup. tres interessant. Super!!!

Would be awesome if it was set up so that you could sandwich other micro boards to increase functionality. Allowing you to run with just a basic esp32, or add other boards if you have the space available. Makes me think there could be a whole community around building out expansion micro boards. Very good work! I wish I knew enough about building boards and electronics, instead of going down the software engineering path.

The seed studio is making really tinny esp32 but this is half the size

cool... however, still needs some way to put an antenna on it... even a wire would work no? or a uFl?

I love challenge for challenges sake, awesome work \

This a DUAL core? Still pretty sweet either way! nice job!

Hello good job mate! I do totally different jobs but i will be happy if i can try solder some of your smallest projects ever ! I dont have issue with solder but big issue with programming. How i can get some PCB the smallest you have to challenge my self also to use different Technics? Thank you !

First : you don't need a usb connector, it's just one time use! So make a J-tag Like pins. Second: you don't need buttons either! Unless the project requires! Instead just use a pins for programing mode. Now you have a completely empty side for a nice wifi antenna!!!

awesome board you made! but esp32c3 will eat 80-100ma of power during wifi or bluetooth. will you fix this?

Can you layer PCBs to break out all of your I/O and add a ceramic antenna? The footprint would not change it would just become thicker.

nice !!!

I see a lot components there. Capacitors, resistors. Can you list what elements are absolutely essential and describe why that one is really needed. I can get the need of chip itself and quartz. But the rest?

Oh man that is even smaller than mine, nice work! I should probably scrap using the ESP32-C3-MINI-H1 and use the raw SOC myself, adding my own supporting components. Did you find the design challenging at all? I've never gone that deep!

You probably don't need a full on usb-c port either. You can use breakout pins. If you power the board externally, maybe with a powerbank, you can probably get away with just + and - data pins with usb

I just want to see the kind of tiny project that warrants such a tiny esp32, like a 1/64th scale rc car

Any chance you'll be making a revised version of one of these available on Tindie? Hopefully with working bluetooth/wifi ... I'd love to make a ring where I can plug it into USB and cut/paste text from my phone to it.

You could make it smaller without the mini-mini-components, by exploring the third dimension: You could fit all your discrete components within the area of the IC: You'd need a board ontop of it, and the token LED could be SMT, while the token buttons could be contact pads to connect with a metal tool. Of course, the IC itself is smaller within its package, so you could shave that down a bit. At this stage, it might be better to add functionality rather than just reducing size, eg some of whatever you're plugging the microcontroller into. It would also be getting smaller than a standard USB connector. Ten+ years ago, ARM put a full processor inside a pen. You'd write with the pen, and it'd record the nib's movements, which you could then download.

Sell one of these in your Tindie or if you have the PCB Gerber file and component list could you provide that? I am interested in shoving one in a USB cable, HDMI cable, etc...

Any thoughts of putting ithe esp32t in a usb-form-factor, like the tomu , fomu , Qomu (crowd supply)?

For wifi antenna, throw a MHF1/u.FL connector (or mhf4). Should be a smaller footprint than one of your buttons.

Now build one inside a Casio case that drives the segmented LCD display.

Nice work

very very nice! If I had to choose a pinout with 4 pins, I'd go for I2C: VDD, GND, SDA and SCL. Endless possibilities!

Does it stil have bluetooth capabilitys? cause if it has i i regret ordering the stuff for my smart ring project. Basically a ring that (when the button is pressed) sends data from an acelerometer, a magnetometer and a gyroscope via bluetooth. So you could just "wave" in the air and dimm the lights youre pointing at or move your hand up and down to controll the volume on your phone. I used an attiny44 with an HJ-580LA bluetooth module for it and i cant figure out how to programm the HJ-580LA its way above my basic arduino skills :). A esp32 would have made it easyer.

maybe you could put this into a hotwheels car to make it a self driving object avoidance toy? That's what I would try to do at least lol

Perhaps next time, you could also fit a teeny tiny screen to it?

Nice, its smal enough to put in a 1:87 model car. I now use a wemos d1 mini for that but its a bit to big for most cars.

you can try to reduce the shaking of one hand by holding this hand with your other hand - it sort of wipes out the shaking smiliar to noise (destructive interference)

does no antenna mean no radio or does this still work with limited range? (think first one?)

Heyy! Absolutely awesome project!!! I just have one question, how did you directly upload the code from usb to the ESP32 chip? Is there no USB to TTL converter required in the middle?

This is super awesome, tho i would love to see a version that can extend gpio count, and also can connect with LTE + battery Subscribed! ❤

Hello Paul - where to buy this one creation of yours which you showed in the video

Hi, How did you manage to solder the bottom side without the top side components falling off? Different melting temperature solder paste?