ard

This account is verified. Learn more

@ardchain

AI • Engineer & Researcher • Automating everything

Collabs | DM open

t.me/ardchain Joined August 2020

97 Following 5.5K Followers 2.5K Posts

Latest posts 5

Pinned post

ard @ardchain Oct 28

update: my ESP32 classroom now has practice!

a few days ago you could explore the board. now you build the circuit yourself on a virtual breadboard:

> drag a resistor and an LED into place
> draw wires from pin to pin
> press Check circuit, then Run, and watch the LED blink in 3D
> download the .ino once it works

guided mode explains every step, down to why five holes on one row are already connected

3 practice lessons so far: blink, a button and an analog dial. more are on the way

free, in your browser

0:15

ard Verified account @ardchain Oct 23

I just built an ESP32 classroom with Astra

no need to buy a starter kit just to figure out what the pins do, start in your browser:

> explore a 3D ESP32 and hover to learn what each component does
> follow highlighted pins and step-by-step wiring guides
> experiment with LEDs, sensors, motors and a tiny piano
> go from interactive demos to wiring diagrams and Arduino code

16 lessons. Free & open source. Desktop & mobile.

Try it in reply↓

View quoted post on X

ard @ardchain 1d

a lighter you charge instead of refill

how it's built:

1. cut a window in a clear gas lighter and pull out the gas valve
2. fit a tiny lipo cell and a charging board inside the shell
3. wire the cell through a switch to a coil of resistance wire in the old flame spot
4. press the button: current heats the coil until paper catches

no gas or flint and matches

2:10

ard Verified account @ardchain Aug 30

building an ESP32 project? before you buy another sensor, learn how to choose the right one, wire it safely, filter noisy readings, and turn physical changes into reliable actions. this guide takes you from the first signal to a working machine: x.com/i/article/2093…
View quoted post on X

ard @ardchain 2d

would you like to have a tiny robot like this?

it shows turn-by-turn directions from your phone and the time, and makes faces while it does. but it's not a product

it's a project built by hand with an ESP32 and a small screen

a lot of what separates a project from a product is how it's shown. this article is about that

0:20

Mitchell Verified account @MitcheIl 2d

x.com/i/article/2118…
View quoted post on X

ard @ardchain 3d

this light can see your heartbeat through your skin

a green LED shines into the wrist. blood absorbs green light far more than the tissue around it

every heartbeat pushes a fresh pulse of blood through, so for a split second more light is absorbed and less bounces back

measure that tiny change over and over and draw it on a screen: one spike, one heartbeat

move the light away and the line goes flat

same trick as the sensor on the back of a smartwatch. this one is a homemade oscilloscope on a breadboard

0:26

ard @ardchain 4d

engineers undervalue one thing: being seen

two of my posts on the same ESP32 topic, ten days apart. same kind of work, very different reach

the demo you already built is the proof. what's missing is the first line that makes someone stop.

this article shows how

0:08

Matt Epstein Verified account @mattepstein 5d

x.com/i/article/2117…
View quoted post on X