High-Performance LoRa Communication Device
The Elecrow ThinkNode M5 is a compact, portable LoRa communication device designed for off-grid messaging, location sharing, and outdoor use. Powered by an ESP32-S3 processor and an SX1262 LoRa chip, it comes pre-installed with Meshtastic firmware and can be configured conveniently via Bluetooth using the official Meshtastic app.
The integrated multi-GNSS module supports GPS, GLONASS, BeiDou, and QZSS for reliable positioning and location sharing. Messages and device information are displayed on the energy-efficient 1.54-inch e-paper screen, while the built-in 1,200 mAh rechargeable battery enables extended mobile operation.
With its integrated LoRa antenna, compact housing, RTC, and support for both Meshtastic and MeshCore firmware, the ThinkNode M5 is a practical communication solution for hiking, camping, remote locations, and emergency situations where conventional mobile networks are unavailable.
Features
LoRa communication
Multi-GNSS positioning
1,200 mAh rechargeable battery
1.54-inch e-paper display
Built-in RTC
Compatible with MeshCore
Compatible with Meshtastic
Specifications
Main Processor (ESP32-S3)
CPU/SoC
Xtensa 32-bit LX7 dual-core processor, clocked at up to 240 MHz
System Memory
512 KB SRAM, 8 MB PSRAM
Storage
4 MB Flash, 384 KB ROM
Firmware
Meshtastic firmware is fully compatible, and the signal is transmitted in LoRa mode
EPD (Electronic Paper Display)
Display Size
1.54 inch EPD (monochrome Ink screen)
Display Materials
E-lnk (Electronic Ink)
Resolution
200 x 200
Driver Chip
SSD1681 (via SPI or I²C interface)
Global Fresh Time
2s
Wireless Communication
Bluetooth
Bluetooth Low Energy and Bluetooth 5.0 (phone configuration)
LoRa
SX1262 LoRa Module, EU 868 MHz(external antenna)
Hardware
Interfaces
USB-C, RP-SMA
Function
GPS Location (GPS, GLONASS, BeiDou, QZSS), EPD Display, RTC, USB 2.0, PMU power management (built-in 1200 mAh lithium battery), buzzer, etc.
Button
Knob Switch, Function Button, Page Turn Button, GPS Switch, Reset Button
LED Indicator
Power supply, GPS/LoRa indication
Others
Power Input
5 V/1 A, supports USB or lithium battery power supply
Power consumption
The maximum working current is about 340 mA (CPU + LoRa module), and the low power consumption is about 34 uA
Operating Temperature
-10~50°C
Storage Temperature
-20~60°C
Relative humidity
10-95%, @ 40°C (non-condensing)
Enclosure
ABS Plastic
Dimensions
82 x 51.6 x 26.3 mm
Weight
81 g
Included
1x Elecrow ThinkNode M5
1x LoRa antenna
1x USB-C cable
1x Manual
Downloads
Manual
With a capacity of 15,000 mAh, the Unitree Go2 battery provides a robust power source that enables your robot to complete tasks with ease. Whether for complex exploration, research projects, or fun excursions, this powerful battery delivers the energy your robot needs.
The runtime of the Unitree Go2 battery varies depending on the application and usage. Based on the functions and activities employed, the battery can offer between 2 to 4 hours of operation. This flexibility allows you to customize the robot as needed, enabling longer exploration missions or more extensive projects.
The Unitree Go2 battery is a reliable companion for your robotics adventures. With its impressive capacity and adaptable runtime, it ensures your robot performs powerfully and with endurance, without frequent recharging.
Whether you need the Unitree Go2 battery as a replacement or an upgrade for your robot, this powerful energy storage solution provides the perfect balance of performance and reliability.
Specifications
Rated voltage: DC 28.8 V
Limited charging voltage: DC 33.6 V
Charging current: 9 A
Rated capacity: 15,000 mAh, 432 Wh
Standard: IS 16046 (Part 2) / IEC 62133-2
Self-developed battery management system (BMS)
Dimensions: 120 x 80 x 182 mm
Functions:
Power indicator
Self-discharge protection of battery storage
Equilibrium charge protection
Overcharge protection
Discharge protection
Short circuit protection
Battery charge detection protection
This bundle contains the AI Fusion Lab Kit – which includes over 450 components – and the book Physical AI with Raspberry Pi, offering a comprehensive, hands-on introduction to AI, electronics, and Python programming.
Build practical projects that combine computer vision, voice interaction, sensors, motors, and large language models. The included book guides you step by step from Raspberry Pi setup and hardware control to advanced applications using OpenCV, MediaPipe, YOLO, OpenAI services, and local Ollama models.
SunFounder AI Fusion Lab Kit for Raspberry Pi (450+ parts)
The AI Fusion Lab Kit transforms a Raspberry Pi into a complete platform for learning artificial intelligence, electronics, and Python programming. It supports Raspberry Pi 5, 4B, 3B+, 3B, and Zero 2 W, as well as popular AI models and services including ChatGPT, Gemini, Grok, DeepSeek, Qwen, Doubao, and Ollama.
With its camera, Pan-Tilt HAT, 10-axis sensor module, microphone, speaker, and electronic components, the kit enables users to build interactive AI projects that combine voice, vision, movement, and sensor data. It is suitable for beginners, students, makers, and anyone who wants to explore practical AI applications.
Build Multimodal AI Projects
Combine large language models with speech recognition, text-to-speech, camera vision, sensors, and breadboard circuits. Create projects that can listen, speak, see, react, and interact with their environment while learning how modern AI systems work.
Explore AI Vision and Object Tracking
Use YOLO, OpenCV, and MediaPipe to detect and track objects, colors, faces, and human movement. The motorized Pan-Tilt HAT allows the camera to follow targets automatically, demonstrating how computer vision and motion control work together.
Voice AI with the Fusion HAT+
The Fusion HAT+ simplifies hardware control through a unified Python library and supports safe Raspberry Pi shutdown. Its integrated microphone and speaker make it easy to develop voice-controlled assistants and other conversational AI applications.
Compatible with Raspberry Pi 5, 4B, 3B+, 3B, and Zero 2 W
Supports multiple cloud-based and local AI models
Includes camera, Pan-Tilt HAT, 10DOF module, microphone, and speaker
Projects covering voice AI, computer vision, sensors, and electronics
Video lessons, documentation, and sample code
Book: Physical AI with Raspberry Pi
Using the Raspberry Pi and the AI Fusion Lab Kit, this book takes you step by step from the fundamentals of hardware interfacing to the development of intelligent systems capable of seeing, listening, speaking, and making decisions. Whether you are a student, educator, maker, or professional engineer, you will gain valuable experience through projects designed to build both knowledge and confidence.
Beginning with system setup, GPIO programming, sensors, displays, motors, and automation techniques, the book gradually introduces more advanced topics, including speech recognition, text-to-speech synthesis, conversational AI, object recognition, and machine learning. Along the way, you will learn how to create voice-controlled devices, intelligent assistants, camera tracking systems, environmental monitoring solutions, and AI-powered embedded applications.
Explore modern technologies such as OpenAI services, Ollama local large language models, OpenCV, MediaPipe, and YOLO object detection while gaining practical experience with real-world applications used in robotics, industrial automation, smart devices, and autonomous systems. You’ll discover how intelligent software can interact with sensors, cameras, motors, and displays to create systems that respond naturally to the world around them.
Rather than simply following code examples, you will be encouraged to experiment, customize, and expand every project. The techniques and skills developed throughout this book provide a solid foundation for future innovation, rapid prototyping, research, and product development. If you are ready to move beyond traditional electronics and explore the future of intelligent embedded systems, this book will guide you every step of the way.
This bundle contains:
SunFounder AI Fusion Lab Kit for Raspberry Pi (normal price: €100)
Book: Physical AI with Raspberry Pi (normal price: €45)
Not included
Raspberry Pi
All-in-One AI Learning and Development Platform for Edge Intelligence
This NVIDIA Jetson-based AI Starter Kit is a versatile platform for learning, development, and hands-on experimentation in Edge AI.
Designed for use with the NVIDIA Jetson Orin Nano, the kit combines an 11.6-inch IPS display, an 8-megapixel pan-tilt camera, and an AI voice interaction system.
It includes 30 functional modules and 38 carefully designed Python courses that progress from beginner to advanced level. The course content covers Python fundamentals, sensor technology, AI vision, and image recognition.
With step-by-step practical exercises ranging from basic programming to real-world computer vision applications, this kit provides an ideal platform for students, makers, developers, and anyone looking to explore artificial intelligence and edge computing.
Please note: The NVIDIA Jetson Orin Nano is not included.
Features
Designed for the NVIDIA Jetson Orin Nano
AI voice interaction module
8 MP camera with pan-tilt control
Supports object and face tracking
No soldering or complex wiring required
Built-in 11.6-inch IPS display
30 functional modules
38 step-by-step Python lessons
I²C, UART, and GPIO expansion interfaces
Portable carrying case included
Specifications
Main Processor
Jetson Orin Nano
Number of Sensors
30
Sensor Board Design
Integrated sensor board, no soldering or complex wiring required
Screen
11.6-inch IPS Screen
Screen Resolution
1366 x 768
Camera
IMX219 8MP
Expansion Interfaces
2x I²C, 1x UART, 1x IO D13, 1xIO D12
Programming Environment
Based on Python
Number of Tutorials
38 creative tutorials
Target Audience
Students, teachers, hardware enthusiasts
Application Scenarios
Ideal for learning AI programming, Jetson Orin Nano basics
Dimensions
300 x 200 x 100 mm
Module List
Module
Quantity
Temperature & Humidity Sensor
1 pcs
Button
4 pcs
Ultrasonic Ranging Sensor
1 pcs
Light Sensor
1 pcs
Linear Potentiometer
1 pcs
Buzzer
1 pcs
LCD
1 pcs
Infrared Remote
1 pcs
Relay
1 pcs
NFC
1 pcs
PIR Motion Sensor
1 pcs
Joystick
1 pcs
4-Digital Display
1 pcs
LED
1 pcs
Microphone
1 pcs
Speaker
1 pair
Vibration Motor
1 pcs
Touch Sensor
1 pcs
8x8 RGB Matrix
1 pcs
Atmospheric pressure sensor
1 pcs
Tilt Switch
1 pcs
Stepper Motor
1 pcs
Accelerometer & Gyro
1 pcs
Gas Sensor (MQ2)
1 pcs
Hall Sensor
1 pcs
Rotary Encoder
1 pcs
U-shaped photoelectric switch
1 pcs
NTC
1 pcs
Servo
2 pcs
Monocular camera
1 pcs
Included
1x Elecrow AI Starter Kit for Jetson Orin Nano
1x IR Remote Control
1x NFC Card
1x 128 GB SD Card
1x 40-pin GPIO Cable
2x 22-pin FPC Cable
2x 24-pin FPC Cable
1x Jetson DP & USB Adapter Board
Not included
NVIDIA Jetson Orin Nano
Downloads
Manual
Wiki
OpenClaw Install and Config Guide
The FNIRSI HRM-10 is a portable, high-precision battery internal resistance and voltage tester. This device offers true four-wire measurement and is designed for both accuracy and ease of use. It automatically measures internal resistance and voltage values simultaneously, displaying the results on its HD color screen. Users have the option to manually adjust voltage and resistance ranges to suit their needs. The device also includes a sorting mode that automatically filters the good and bad batteries based on user-set thresholds. Additionally, it supports the storage of historical data and allows for exporting measurement records in table format.
Features
High Measurement Accuracy
Tabular Data Export
Auto-Evaluate Measurement Results
8 Threshold Settings
HD Color Screen
Folding Stand
1000 mAh Lithium Battery
Specifications
Voltage
Resistance
Measuring range
0-100 V (DC)
0-200 Ω
Accuracy
±0.5%
±0.5%
Gear
Automatic, 1 V, 10 V, 100 V
Automatic, 20 mΩ, 200 mΩ, 2 Ω, 20 Ω, 200 Ω
Instrument test signal frequency
1 Khz (AC)
Rechargeable
USB-C (5 V/1 A)
Built-in battery
1000 mAh lithium battery
User calibration
Yes
Sorting mode
Yes
History record
Yes
Recorded data export
Yes
Working environment
–10°C to +45°C, relative humidity <80%
Storage environment
–20°C to +80°C, relative humidity <80%
Dimensions
158.7 x 80.5 x 28.4 mm
Weight
225 g
Included
1x FNIRSI HRM-10 Internal Resistance Tester
1x Clip Test Line
1x USB-C data cable
1x Manual
Downloads
Manual
Firmware V0.3
The Joy-Pi Advanced is a compact and powerful device that allows you to realize your projects quickly and easily. Whether you already have a lot of experience, or next to none, the Joy-Pi Advanced lets you unleash your creativity. Thanks to its compatibility with a wide range of platforms, including Raspberry Pi, Raspberry Pi Pico, Arduino Nano, BBC micro:bit, and NodeMCU ESP32, you can easily and quickly access your preferred platform.
In addition, the Joy-Pi Advanced features more than 30 stations, lessons, and modules, giving you an unlimited variety of ways to get your projects done. With the self-developed learning center, you can not only improve your skills but also create new projects. The learning center offers a wealth of information and tutorials that will guide you step by step through your projects.
Joy-Pi Advanced is characterized in particular by its intelligent switch units, which allow an extended use of the available pins. A total of three switch units are integrated, each equipped with 12 individual switches that provide precise control of the connected sensors and modules. This system solves the well-known problem of limited pin count that occurs with conventional microcontrollers. The switch units allow you to operate a large number of sensors and modules in parallel by switching them on and off individually. This simulates multiple pin assignment, allowing you to exploit the full power of your projects without compromising functionality.
By combining innovative adapter boards and the micro:bit slot, you can achieve seamless compatibility with a wide range of microcontrollers such as Raspberry Pi Pico, NodeMCU ESP32, micro:mit and Arduino Nano. The specially developed adapter boards are designed to perfectly match the respective microcontroller. By plugging the microcontroller onto the appropriate adapter board and then plugging it into the micro:bit slot, the Joy-Pi Advanced quickly and easily becomes compatible with the different microcontrollers. This allows seamless integration of your preferred platform and the ability to combine the strengths of the different microcontrollers in your projects. This way, you can fully focus on your creative projects without worrying about the compatibility of different microcontrollers. The Joy-Pi Advanced simplifies the development process and gives you the possibility to design your projects flexibly and individually.
Features
Highly integrated development platform & learning center
Fast, easy & wireless combination of various sensors & actuators
Installation option for Raspberry Pi 4
Compatible with various microcontrollers
Self-developed, didactic learning platform for Raspberry Pi & Windows
Specifications
Compatible to
Raspberry Pi 4, Arduino Nano, NodeMCU ESP32, BBC micro:bit, Raspberry Pi Pico
Installed sensors, actuators & components
39
Learning platform
Over 40 entries in the know-ledge database, 10 projects, 10 learning tasks, 14 visions
Displays
7-segment display, 16x2 display, 1.8“ TFT display, 0.96" OLED display, 8x8 RGB matrix
Sensors
DS18B20, shock sensor, hall sensor, barometer, sound sensor, gyroscope, PIR sensor, Light barrier, NTC, Light sensor, 6x touch sensor, color sensor, ultrasonic distance sensor, DHT11 temperature & humidity sensor
Control
Joystick, 5x switches, potentiometer, rotary encoder, 4x4 button matrix, relays, PWM fan
Motors
Servo interface, Stepper motor interface, Vibration motor
Measuring & conversion modules
Analog-Digital Converter, Level converter, voltmeter, Variable voltage supply
Other components
RTC real time clock, buzzer, EEPROM memory, infrared receiver, breadboard, RFID reader
Adapter boards
Adapter for NodeMCU ESP32, Arduino Nano & Raspberry Pi Pico, Board connectors for Raspberry Pi & External Boards
Electronic components
Infrared remote control, RFID chip, RFID card, 6x alligator clips, microSD card reader, servo motor, stepper motor, 32 GB microSD card
Components
40x resistors, 3x green LEDs, 3x yellow LEDs, 3x red LEDs, 1x transistor, 5x buttons, 1x potentiometer, 2x capacitors
Other accessories
Screw assortment, screwdriver, accessory storage bag, power supply & power cable, servo mount
Power supply
Built-in power supply: 36 W, 12 V, 3 A Case connector: Small device plug C8
Voltage outputs
12 V, 5 V, 3.3 V, Variable voltage output (2-11 V)
Data buses & signal outputs
I²C, SPI, Analog to digital converter
Battery (RTC)
CR2032
Dimensions
327 x 200 x 52 mm
Included
Raspberry Pi 4 (8 GB RAM)
Downloads
Joy-Pi website
Datasheet
Manual
The FNIRSI SWM-20 handheld spot welder is a high-efficiency, user-friendly, and easy-to-carry welding tool. It features dual-pulse spot welding technology, ensuring more stable and reliable welds, and also includes a convenient power bank function.
Equipped with a 2.4-inch HD display, the SWM-20 offers clear and intuitive operation. Its rotary encoder knob allows users to adjust parameters quickly and precisely, making it easy to set the required welding settings and improving the overall user experience.
Features
2-in-1: Spot Welder & 5000 mAh Power Bank
1200 A High-Power Output for Strong, Reliable Welds
Dual-Pulse Technology for Cleaner & More Stable Welding
Dual A-Grade Batteries with 8 Safety Protections
0.1–0.5 mm Multi-Material Welding Capability
10,000+ Precision Adjustment Levels for Professional Control
2.4-inch TFT Display with Real-Time Data Monitoring
Specifications
Max Welding Current
1200 A
Battery Capacity
5000 mAh
Charging
5 V/2.1 A
Discharging
5 V/2.1 A
Welding Materials
Nickel, Iron, Stainless Steel
Welding Thickness
0.1‒0.5 mm
Level
4 Preset Combination Levels
Dimensions
13.3 x 8.8 x 3.2 cm
Weight
850 g
Included
1x FNIRSI SWM-20 Spot Welder
2x Welding Pens
2x Replacement Tips
1x Nickel Strip
1x USB-C Cable
1x Manual
Downloads
Manual
Arduino-compatible, ESP32-controlled, 2-wheeled Balancing Robot
The Elektor Mini-Wheelie is an experimental autonomous self-balancing robot platform. Based on an ESP32-S3 microcontroller, the self-balancing robot is fully programmable using the Arduino environment and open-source libraries. Its wireless capabilities allow it to be controlled remotely over Wi-Fi, Bluetooth or ESP-NOW or to communicate with a user or even another robot.
An ultrasonic transducer is available for detecting obstacles. Its color display can be used for displaying cute facial expressions or, for the more down-to-earth users, cryptic debug messages.
The robot comes as a neat kit of parts that you must assemble yourself. Everything is included, even a screwdriver.
Note: The Mini-Wheelie is an educational development platform intended for learning, experimentation, and robotics development. It is not classified as a toy for children, and its features, documentation, and intended audience reflect this purpose. The product is aimed at students, educators, and developers who wish to explore robotics, programming, and hardware integration in an educational setting.
Specifications
ESP32-S3 microcontroller with Wi-Fi and Bluetooth
MPU6050 6-axis Inertial Measurement Unit (IMU)
Two independently controlled 12 V electric motors with tachometer
Ultrasonic transducer
2.9" TFT color display (320 x 240)
MicroSD card slot
Battery power monitor
3S rechargeable Li-Po battery (11.1 V/2200 mAh)
Battery charger included
Arduino-based open-source software
Dimensions (W x L x H): 23 x 8 x 13 cm
Included
1x ESP32-S3 Mainboard + MPU6050 module
1x LCD board (2.9 inch)
1x Ultrasonic sensor
1x Battery pack (2200 mAh)
1x Battery charger
1x Motor tyre kit
1x Case board
1x Acrylic board
1x Screwdriver
1x Protective strip
1x Flex cable B (8 cm)
1x Flex cable A (12 cm)
1x Flex cable C
4x Copper column A (25 mm)
4x Copper column B (55 mm)
4x Copper column C (5 mm)
2x Plastic nylon column
8x Screws A (10 mm)
24x Screws B (M3x5)
8x Nuts
24x Metal washers
2x Zip tie
1x MicroSD card (32 GB)
Downloads
Documentation
3K5 Noteworthy Designs (1975-2026)
This USB archive stick contains over 3,500 noteworthy circuits from all areas of electronics (audio & video, hobby & modelling, home & garden, test & measurement, computers & microcontrollers, radio, power supplies & batteries) published in Elektor Magazine since 1975. Most circuits are sourced from the Elektor Summer Circuits editions.
You can use the article search function to find specific content in the full text. The results are always shown as preformatted PDF documents. Adobe Reader may be used to browse articles as well as find individual words and expressions using the program’s integrated Search functions.
Please note that no Summer Circuits editions were published between 2014 and 2022, so these years are not included in the directory.
Specifications
Storage
16 GB
Connectors
1x USB-A1x USB-C
The Siglent SPD4121X is a 4-channel DC Linear Programmable Power Supply equipped with a 4.3-inch TFT-LCD display, friendly human-machine interface, and excellent performance indicators. Real-time waveform display provides engineers with an informative user interface.
SPD4121X offers a total output power of 285 W with a resolution of 1 mV/1 mA. The maximum voltage and current for each channel are as follows:
CH1: 15 V/1.5 A
CH2: 12 V/10 A
CH3: 12 V/10 A
CH4: 15 V/1.5 A
Features
Rated output power: 285 W
Rated voltage: 32 V, 12 V, 30 V
Up to four high-precision power supplies with independent controllable outputs, supporting CH2 and CH3 series and parallel connections
Clear graphical interface with waveform and timer display modes
5-digit voltage and current display with minimum resolution of 1 mV, 1 mA
Fast output response time: <50us
The high current channel support remote voltage compensation sense function. The maximum compensation voltage is 0.6 V
Overvoltage protection and overcurrent protection or safe and accurate operation
Equipped with a 4.3-inch TFT-LCD display (480 x 272 resolution)
USB and LAN standard communication
USB-GPIB module is optional
Excellent channel density with up to 4 channels in a 3U half rack package
Internal data storage for setups and parameters
Embedded Web Server with instrument communication that doesn’t require software installation
Fully SCPI programming command set support as well as a LabView driver for remote control and system automation
Specifications
SPD4323X
SPD4121X
SPD4306X
Channel Output
CH1: Voltage 0 to 6 V Current 0 to 3.2 ACH2: Voltage 0 to 32 V Current 0 to 3.2 ACH3: Voltage 0 to 32 V Current 0 to 3.2 ACH4: Voltage 0 to 6 V Current 0 to 3.2 A
CH1: Voltage 0 to 15 V Current 0 to 1.5 ACH2: Voltage 0 to 12 V Current 0 to 10 ACH3: Voltage 0 to 12 V Current 0 to 10 ACH4: Voltage 0 to 15 V Current 0 to 1.5 A
CH1: Voltage 0 to 15 V Current 0 to 1.5 ACH2: Voltage 0 to 30 V Current 0 to 6 ACH3: Voltage 0 to 30 V Current 0 to 6 ACH4: Voltage 0 to 15 V Current 0 to 1 A
Resolution
1 mV, 1 mA
1 mV, 1 mA
1 mV, 1 mA
Setting Accuracy
Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA
Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA
Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA
Readback Accuracy
Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA
Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA
Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA
Display
4.3" TFT-LCD 5-digit voltage and current display
4.3" TFT-LCD 5-digit voltage and current display
4.3" TFT-LCD 5-digit voltage and current display
Output power
240 W
285 W
400 W
Included
1x Siglent SPD4121X Power Supply
1x Power cord (EU)
1x Output test cord (3 A)
1x USB cable
1x Quick start guide
Downloads
Datasheet
Manual
Quick start
,
by Clemens Valens
Unveiling the Precision of the Fnirsi HRM-10 Battery Resistance Tester
As the world shifts towards battery-powered devices, the demand for tools to test and repair these batteries is skyrocketing. After previously reviewing the Fnirsi SWM-10...
,
by Clemens Valens
Fix Battery Packs Like a Pro: Fnirsi SWM-10 Portable Spot Welder Review
In an era dominated by cordless tools, electric bikes, and various battery-powered devices, the ability to repair battery packs has become increasingly important. Spot welding,...