Microcontrollers and dev boards
ESP8266 IO Lead Out Adapter Plate Expansion Module for ESP-07 ESP-12 ESP-12E
JD 0.525
All your project's parts, in one place
Parts everyone starts with
The cheapest option from each main category.
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Arduino UNO
Starting point- Processor
- ATmega328P · 16 MHz
- Memory
- 2 KB
- Pins
- 14 digital · 6 analog
- Communication
- No connectivity (needs a module)
- Power
- USB or 7–12 V
- Approximate price
- JD 10–22
- The easiest to learn on
- Its pins tolerate mistakes
- Tutorials everywhere
- Very little memory
- No Wi-Fi
- Slow for images and computation
When to choose it? A project with simple sensors and a display: gas alarm, counter, motor control.
ESP32
The most used in our projects- Processor
- Dual core · 240 MHz
- Memory
- 520 KB
- Pins
- ~30 pins · ADC, DAC, and touch
- Communication
- Built-in Wi-Fi + Bluetooth
- Power
- USB or 5 V · power-saving sleep mode
- Approximate price
- JD 8–11
- Wi-Fi and Bluetooth with no extra parts
- Faster and cheaper than UNO
- Sleeps on a battery for months
- 3.3 V pins (careful)
- Some pins are reserved
- A bit harder for beginners
When to choose it? Any project that sends data to a phone or server. Most of our projects use it.
ESP8266 NodeMCU
The cheapest with Wi-Fi- Processor
- Single core · 80 MHz
- Memory
- 80 KB
- Pins
- 11 digital · one analog input
- Communication
- Built-in Wi-Fi
- Power
- USB or 5 V
- Approximate price
- JD 5–7
- The cheapest way to Wi-Fi
- Small and light
- Programmed in the same Arduino environment
- Only one analog input
- No Bluetooth
- Far fewer pins
When to choose it? A simple connected project: temperature monitoring, remote switch, a counter that reports to the cloud.
Raspberry Pi Pico
A microcontroller at a token price- Processor
- RP2040 dual-core · 133 MHz
- Memory
- 264 KB
- Pins
- 26 pins · 3 analog inputs
- Communication
- Depends on the model (W has Wi-Fi)
- Power
- USB or 5 V
- Approximate price
- JD 6–9
- Cheap and strong for computation
- Easily programmed in MicroPython
- Great for precise timing (PIO)
- The standard model, no connectivity
- Fewer libraries than Arduino
- Sometimes needs soldering
When to choose it? Precise motor control or fast reading, or when the budget is tight.
Raspberry Pi
A full computer, not a microcontroller- Processor
- Quad-core ARM · up to 2.4 GHz
- Memory
- 1 to 8 GB
- Pins
- 40 GPIO pins
- Communication
- Wi-Fi + Ethernet + Bluetooth
- Power
- USB-C 5 V 3 A
- Approximate price
- JD 35–90
- Runs Linux and Python
- Handles images, video, and AI
- Connects a screen and keyboard
- Much more expensive
- Uses more power
- Not suited to running on a battery for long
When to choose it? Face recognition, image diagnosis, a local server, or a dashboard on a screen.
Quick rule: need to read sensors and control parts → Microcontroller. Need a camera, AI, or an operating system → Computer.
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