The XIAO ESP32-C3 board combines the ultra-compact form factor of the XIAO series with the full capabilities of the ESP32-C3 chip, including integrated Wi-Fi and Bluetooth 5.0. This book is a comprehensive, hands-on guide to getting the most out of this powerful yet affordable development board.
The author takes readers from the fundamentals to advanced projects. Starting with LED blinking and dimming, the book progresses to ADC and PWM for precise sensor interfacing and PWM-controlled lighting effects before moving on to building practical, real-world applications, including:
A Wi-Fi weather station with an OLED display and real-time online weather data
An ultrasonic parking assistant with audible feedback
A refrigerator monitoring probe with climate sensing and Deep Sleep for years of battery operation
A retro Pong game controlled by a touch-free sensor
A microphone-based party app that responds to claps
And much more: lighting control, reaction-time measurement, mains frequency analysis, soil moisture sensing, ambient LED lighting, and 7-segment displays
Learn how to use the ESP32 Microcontroller and MicroPython programming in your future projects!
The project book, written by well-known Elektor author Dogan Ibrahim, holds many software- and hardware-based projects especially developed for the MakePython ESP32 Development Kit. The kit comes with several LEDs, sensors, and actuators. The kit will help you acquire the basic knowledge to create IoT projects.
The book’s fully evaluated projects feature all the supplied components. Each project includes a block diagram, a circuit diagram, a full program listing, and a complete program description.
Included in the kit
1x MakePython ESP32 development board with LCD
1x Ultrasonic ranging module
1x Temperature and humidity sensor
1x Buzzer module
1x DS18B20 module
1x Infrared module
1x Potentiometer
1x WS2812 module
1x Sound sensor
1x Vibration sensor
1x Photosensitive resistance module
1x Pulse sensor
1x Servo motor
1x USB cable
2x Button
2x Breadboard
45x Jumper wire
10x Resistor 330R
10x LED (Red)
10x LED (Green)
1x Project book (206 pages)
46 Projects in the Book
LED Projects
Blinking LED
Flashing SOS
Blinking LED – using a timer
Alternately flashing LEDs
Button control
Changing the LED flashing rate using pushbutton interrupts
Chasing-LEDs
Binary-counting LEDs
Christmas lights (random-flashing 8 LEDs)
Electronic dice
Lucky day of the week
Pulsewidth Modulation (PWM) Projects
Generate a 1000-Hz PWM waveform with 50% duty cycle
LED brightness control
Measuring the frequency and duty cycle of a PWM waveform
Melody maker
Simple electronic organ
Servo motor control
Servo motor DS18B20 thermometer
Analog To Digital Converter (ADC) Projects
Voltmeter
Plotting the analog input voltage
ESP32 internal temperature sensor
Ohmmeter
Photosensitive resistance module
Digital To Analog Converter (DAC) Projects
Generating fixed voltages
Generating a sawtooth-wave signal
Generating a triangular-wave signal
Arbitrary periodic waveform
Generating a sinewave signal
Generating accurate sinewave signal using timer interrupts
Using The OLED Display
Seconds counter
Event counter
DS18B20 OLED based digital thermometer
ON-OFF temperature controller
Measuring the temperature and humidity
Ultrasonic distance measurement
Height of a person (stadiometer)
Heart rate (pulse) measurement
Other Sensors Supplied with the Kit
Theft alarm
Sound-activated light
Infrared obstacle avoidance with buzzer
WS2812 RGB LED ring
Timestamping temperature and humidity readings
Network Programming
Wi-Fi scanner
Remote control from the Internet browser (using a smartphone or PC) – Web Server
Storing temperature and humidity data in the Cloud
Low-Power Operation
Using a timer to wake up the processor
The Andonstar AD409 Max-ES boosts a high-quality metal lens and a unique UV filter design. Crafted from top-tier industrial-grade materials, it delivers unmatched precision and durability, ensuring a reliable product experience. The UV filter positioned in front of the metal lens blocks soldering heat, smoke, and dust, safeguarding the lens and making it perfect for soldering and maintenance professionals.
The AD409 Max-ES features an oversized Max station (46 x 37 x 47.5 cm) and an advanced tool set, expanding the soldering station area by 370%. This upgrade meets the demands of professional soldering tasks and provides ample workspace for larger projects.
The easy-to-use tool holder keeps tools within reach, ensuring they are always accessible. Additionally, the soldering helping hands with rotatable clamps simplify soldering and repair tasks, enhancing efficiency and convenience.
The endoscope offers an all-around 360° view. This allows for clear observation of components from all sides and inside pipes, eliminating blind spots and ensuring thorough inspections.
Features
High-quality Metal Lens and Unique UV Filter Design
New Max station
Easy-to-use Tool Holder and Soldering Helping Hands
Microscope with Endoscope All-around View 360°
Professional HDMI Digital Microscope supports Multiple Output Methods
8 Levels adjustable LEDs
Convenient Wireless Remote Control
Specifications
Screen size
10.1 inch (1280x800)
Image sensor
4 MP
Video output
UHD 2880x2160 (24fps)FHD 1920x1080 (60fps/30fps)HD 1280x720 (120fps)
Video format
MP4
Magnification
Up to 300 times (27 inch HDMI monitor)
Photo resolution
Max. 24 MP (5600x4200)
Photo format
JPG
Focus range
Min. 5 cm
Frame Rate
Max. 120fps
Video interface
HDMI
Storage
microSD card (up to 64 GB)
PC support
Windows, PC software with measurement
Mobile phone, tablet terminal support
Support WiFi connection and measurement
Power source
5 V DC
Light source
2 LEDs with the stand
Endoscope
Yes
Stand size
46 x 37 x 47.5 cm (18.1 x 14.6 x 18.7")
Included
1x Andonstar AD409 Max-ES Digital Microscope
1x Endoscope
1x Stand with 2 LEDs
1x UV filter (already assembled in the lens)
1x Soldering mat
1x Beam
1x Column
1x Tool holder
1x Soldering Helping Hands
1x Power adapter
1x Power cable
1x HDMI cable
1x USB cable
1x IR remote
1x Manual
Downloads
Manual
Software
The SEQURE HT140 is a highly versatile 2-in-1 soldering tool that combines the functionality of hot tweezers and a soldering iron. It is specifically engineered for precise SMD soldering and desoldering tasks.
With independent control for single-sided heating, it operates as a traditional soldering iron when fitted with a standard tip. When configured for dual-sided heating, it transforms into hot tweezers – perfect for the efficient and accurate removal of SMD components.
Features
Working Temperature: 50-500°C (122-932°F)
Supports multiple power inputs: PD 3.1/3.0/2.0, QC 3.0/2.0, (5-28 V DC), LiPo batteries, and power adapters.
The HT140 combines hot tweezers and a soldering iron, with independent single- or dual-sided heating. Use it as a soldering iron with a tip, or as hot tweezers for easy SMD desoldering.
Voltage and current can be adjusted based on the power source.
Features dual temperature control, presets, quick temperature increase, and fine-tuning.
128 x 32 OLED screen with adjustable brightness, and orientation. Switchable °C/°F.
High-precision heating element with ±1% accuracy. Melts solder in just 2 seconds.
Smart standby, sleep, and wake-up functions extend tip lifespan and boost efficiency.
Supports temperature calibration and compensation for precise work.
Includes a 1.5 m heat-resistant PD 150 W silicone cable and a sturdy all-metal HT Station.
Swappable tips and adjustable angles for various SMD soldering tasks.
Specifications
Working Voltage
5-28 V DC
Maximum Power
140 W
Working Temperature
50-500°C (122-932°F)
Tin Melting Time
2s
Interface Type
USB-C, DC5525
Power Supply
PD 3.1/3.0/2.0, QC 3.0/2.0, 28 V DC max
Display
128 x 32 OLED
Firmware Upgrade
Yes
Menu Languages
English, Russian, Chinese
Dimensions
160 x 27 x 17.5 mm
Weight
50 g
Included
1x SEQURE HT140 Host
2x HT140-IS Tapered Curved Desoldering Tips
1x HT Station
1x Accessory Package
1x Storage Bag
1x 65 W PD Power Supply (EU, UK & US)
1x 24 W PD Silicone Wire (1.5 m)
1x GND Wire Accessory Kit (1.8 m)
Downloads
Manual
Firmware V1.04
Build Your Own Vintage Radio Broadcaster
The Elektor AM Transmitter Kit allows streaming audio to vintage AM radio receivers. Based on a Raspberry Pi Pico microcontroller module, the AM Transmitter can transmit on 32 frequencies in the AM band, from 500 kHz up to 1.6 MHz in 32 steps of approx. 35 kHz.
The frequency is selected with a potentiometer and shown on a 0.96" OLED display. A pushbutton allows toggles the transmitting mode between On and Off. The range of the transmitter depends on the antenna. The onboard antenna provides a range of a few centimeters, requiring the AM Transmitter to be placed close to or inside the radio. An external loop antenna (not included) can be connected to increase the range.
The Elektor AM Transmitter Kit comes as a kit of parts that you must solder to the board yourself.
Features
The board is compatible with a Hammond 1593N enclosure (not included).A 5 VDC power supply with micro-USB connector (e.g., an old phone charger) is needed to power the kit (not included). Current consumption is 100 mA.
The Arduino software (requiring Earle Philhower’s RP2040 Boards Package) for the Elektor AM Transmitter Kit plus more information is available at the Elektor Labs page of this project.
Component List
Resistors
R1, R4 = 100 Ω
R2, R3, R8 = 10 kΩ
R5, R6, R9, R10, R11 = 1 kΩ
R7 = optional (not included)
P1 = potentiometer 100 kΩ, linear
Capacitors
C1 = 22 µF 16V
C2, C4 = 10 nF
C3 = 150 pF
Miscellaneous
K1 = 4×1 pin socket
K2, K3 = 3.5 mm socket
Raspberry Pi Pico
pushbutton, angle mount
0.96" monochrome I²C OLED display
PCB 150292-1
This complete STM32 microcontroller programming course features a textbook, a component kit, hands-on projects, and a comprehensive online course. It is ideal for step-by-step learning of embedded systems programming in MicroPython using a practical, hands-on approach.
A Practical Introduction to Embedded Systems with the STM32
This course is designed for people who are new to embedded systems and looking for a structured, example-driven way to get started. A kit of parts comprising LEDs and resistors, switches, sensors and actuators, displays, a breadboard and wires, and more is included. These are used in the course to illustrate example applications.
No prior experience with MicroPython or embedded development is required. Each section features hands-on examples and mini projects designed to reinforce key concepts and inspire deeper exploration. By the end of the course, you’ll be able not only to reproduce the examples but also to build on them with your own ideas and applications.
What Will You Learn?
Microcontroller programming in MicroPython on the STM32 using the Thonny IDE
Working with Digital I/O, read buttons and encoders, control LEDs and relays
Read analog inputs, voltages, and analog sensors
Generating analog output signals and PWM
Use serial communication like UART, I²C and SPI to control displays and read digital sensors and SD cards
Managing time
Working with interrupts
Real-time sensor input and control via buttons, LEDs, and displays
Control actuators like relays and servo motors
Who Is It For?
Students and self-learners exploring embedded systems
Makers and IoT enthusiasts looking to improve their hardware skills
Educators and trainers seeking ready-to-teach material
What's Inside the Box?
Access to the full course on the Elektor Academy Pro Learning Platform
STM32 NUCLEO-F411RE microcontroller board
Book: MicroPython for STM32
Downloadable project files for every module
Component Box:
2× LED, red, 5 mm
LED, green, 5 mm
3× Resistor, 470 Ω, 0.25 W
LDR
Potentiometer, 10 kΩ, linear
Pushbutton
Rotary encoder module
Relay module
DHT22 Humidity & Temperature Sensor
TM1637-compatible 4-digit 7-segment display
MPU-6050 IMU with headers
SSD1306-compatible I²C OLED display
Micro SD card adapter with header
Buzzer
SG90 Micro Servo
ILI9341-compatible SPI 240×320 TFT display
20× Jumper wires
Breadboard
The Elektor Super Servo Tester can control servos and measure servo signals. It can test up to four servo channels at the same time.
The Super Servo Tester comes as a kit. All the parts required to assemble the Super Servo Tester are included in the kit. Assembling the kit requires basic soldering skills. The microcontroller is already programmed.
The Super Servo Tester features two operating modes: Control/Manual and Measure/Inputs.
In Control/Manual mode the Super Servo Tester generates control signals on its outputs for up to four servos or for the flight controller or ESC. The signals are controlled by the four potentiometers.
In Measure/Inputs the Super Servo Tester measures the servo signals connected to its inputs. These signals may come from for instance an ESC, a flight controller, or the receiver or another device. The signals are also routed to the outputs to control the servos or the flight controller or ESC. The results are shown on the display.
Specifications
Operating modes
Control/Manual & Measure/Inputs
Channels
3
Servo signal inputs
4
Servo signal outputs
4
Alarm
Buzzer & LED
Display
0.96' OLED (128 x 32 pixels)
Input voltage on K5
7-12 VDC
Input voltage on K1
5-7.5 VDC
Input current
30 mA (9 VDC on K5, nothing connected to K1 and K2)
Dimensions
113 x 66 x 25 mm
Weight
60 g
Included
Resistors (0.25 W)
R1, R3
1 kΩ, 5%
R2, R4, R5, R6, R7, R9, R10
10 kΩ, 5%
R8
22 Ω, 5%
P1, P2, P3, P4
10 kΩ, lin/B, vertical potentiometer
Capacitors
C1
100 µF 16 V
C2
10 µF 25 V
C3, C4, C7
100 nF
C5, C6
22 pF
Semiconductors
D1
1N5817
D2
LM385Z-2.5
D3
BZX79-C5V1
IC1
7805
IC2
ATmega328P-PU, programmed
LED1
LED, 3 mm, red
T1
2N7000
Miscellaneous
BUZ1
Piezo buzzer with oscillator
K1, K2
2-row, 12-way pinheader, 90°
K5
Barrel jack
K4
1-row, 4-way pin socket
K3
2-row, 6-way boxed pinheader
S1
Slide switch DPDT
S2
Slide switch SPDT
X1
Crystal, 16 MHz
28-way DIP socket for IC2
Elektor PCB
OLED display, 0.96', 128 x 32 pixels, 4-pin I²C interface
Links
Elektor Magazine
Elektor Labs
The OWON SDS1102 is an affordable benchtop digital oscilloscope that combines solid performance with essential measurement features. This 2-channel oscilloscope offers a 100 MHz bandwidth, a 1 GS/s sampling rate, a 7-inch LCD display, and a 10 kpts memory depth, making it a practical choice for everyday electronics testing, troubleshooting, and education.
The SDS1102 features a simplified trigger system with level and edge triggering, making it easy to capture and analyze common signals. It is designed for applications that do not require deep memory or advanced trigger functions, offering a straightforward and cost-effective solution for basic signal analysis.
Features
Bandwidth: 100 MHz
2 channels
Sample rate: 1 GS/s
Ultra-thin body
7-inch high-res LCD
SCPI and LabVIEW supported
Specifications
Bandwidth
100 MHz
Horizontal Scale (s/div)
5 ns/div – 1000 s/div
Channel
2
Vertical Sensitivity
5 mV/div – 5 V/div (at input)
DC Gain Accuracy
3%
Vertical Resolution (A/D)
8 bits (2 channels simultaneously)
Input
Input Impedance
1 MΩ, 10 pF
Input Coupling
AC, DC, GND
Max Input Voltage
±400 V, CATI, CATII
Passive probes
х1; х10
Probe Attenuation Factor
х1; х10; х100; х1000
Trigger System
Trigger Mode
Auto, Normal, Single
Trigger Type
Edge, Video
Edge Trigger Source
CH1, CH2
Video Trigger
Sampling Type
Real-time
Sample Rate
1 GS/s
Equivalent Sample Rate
No
Wavelength
10K pts
Interpolation
sin(x)/x
Measurement and Mathematical Treatment System
Automatic Measurement
Vpp, Vavg, RMS, Frequency, Period, Vmax, Vmin, Vtop, Vbase, Width, Overshoot, Pre-shootRise time, Fall time, +Width, -Width, +Duty, -Duty, Delay A→B, Delay A→B, area, cycle area
Math Functions
Addition, Subtraction, Multiplication, Division, FFT
General Characteristics
Display type
7" color LCD
Display Resolution
800 x 480
Power
100-240 V, 45-440 Hz, <15 W
Dimensions
301 x 70 x 152 mm
Weight
1.1 kg
Included
1x OWON SDS1102 Oscilloscope
2x Oscilloscope probes
1x Probe adjust
1x Mains power cord
1x USB cable
1x CD-Rom
1x Quick guide
Downloads
Quick Guide
Manual
PC Software
SCPI Commands
Oscilloscope, multimeter and waveform generator in the same battery-powered device, to work on the go.
Features
Oscilloscope + multimeter + waveform generator, multifunction in one
3.5-inch high-resolution, high-contrast colour LCD display, suitable for outdoor use
18650 lithium battery, comprehensive power consumption ≤3 W, can work continuously for about 6 hours
USB-C interface, support power bank, support PC software connection
Self-calibration function
SCPI supported, facilitate secondary development
Specifications
Oscilloscope
Bandwidth
70 MHz
Channels
2-ch Oscilloscope + 1-ch Generator
Sample Rate
250 MSa/s
Acquisition Model
Normal, Peak detect
Record Length
8K
Display
3.5-inch LCD
Waveform Refresh Rate
10,000 wfrms/s
Input Coupling
DC, AC, and Ground
Input Impedance
1 MΩ ±2%, in parallel with 16pF±10pF
Probe Attenuation Factors
1X,10X,100X,1000X,10000X
Max. input Voltage
400 V (DC+AC, PK-PK, 1MΩ input impedance) (10:1 probe attenuation)
Bandwidth Limit (typical)
20 MHz
Horizontal Scale
5 ns/div - 1000 s/div, step by 1 - 2 - 5
Vertical Sensitivity
10 mV/div - 10 V/div
Vertical Resolution
8 bits
Trigger Type
Edge
Trigger Modes
Auto, Normal, single
Automatic Measurement
Period, Frequency, Mean, PK-PK, Max, Min
Cursor Measurement
ΔV, ΔT, ΔT& ΔV between cursors
Communication Interface
USB Type-C
Multimeter
Max. Resolution
20,000 counts
Testing Mode
Voltage, Current, Resistance, Capacitance, Diode, and Continuity test
Input Impedance
10 MΩ
Max Input Voltage
AC: 750 V | DC: 1000 V
Max Input Current
DC: 10 A | AC: 10 A
Diode
0-2 V
Waveform Generator
Frequency Output
Sine
0.1 Hz - 25 MHz
Square
0.1 Hz - 5 MHz
Ramp
0.1 Hz - 1 MHz
Pulse
0.1 Hz - 5 MHz
Arbitrary
0.1 Hz - 5 MHz
Sampling Rate
125 MSa/s
Channel
1-ch
Amplitude Range
20 mVpp - 5 Vpp
Waveform Length
8K
Vertical Resolution
14 bits
Output Impedance
50Ω
Downloads
User Manual for HDS200 Series
SCPI Protocol for HDS200 Series
Quick Guide for HDS200 Series
PC Software for OWON HDS200 Series
Multilingual DIY Kit (incl. 27 RGB LEDs + Raspberry Pi Pico)
Bring some engineering magic to your festive season with the Wordy LED Christmas Tree, a unique DIY electronics kit designed by Elektor. This beautifully engineered 3D Christmas tree combines eleven PCBs, a Raspberry Pi Pico, and 27 addressable RGB LEDs to illuminate Christmas greetings in seven languages: Danish, Dutch, English, French, German, Italian, and Spanish.
Unlike ordinary LED trees, each word inside the tree has its own light chamber, creating a refined, softly glowing display without sound or flicker. The LEDs are fully WS2812-compatible and driven via the popular Adafruit NeoPixel library, making custom animations and color effects easy to create.
Perfect for makers, tinkerers, and festive electronics fans, this kit offers both an enjoyable build and a striking, conversation-worthy decoration. The Wordy Christmas Tree is your perfect holiday maker project!
Features
Multilingual greetings (7 languages) milled into the front panel
3D construction from 11 interlocking PCBs
Powered by Raspberry Pi Pico
27 individually addressable RGB LEDs (pre-mounted)
Smooth fade-in and fade-out animations
Fully programmable using the Arduino IDE
A 5-V power supply (with micro-USB connector) capable of ≥1 A is recommended for maximum brightness (not included)
Dimensions (H x W x D): 130 x 115 x 75 mm
Included
All required PCBs with LEDs and other SMD parts mounted
Raspberry Pi Pico (to be soldered & programmed by the user)
3-way pin header (to be soldered by the user)
3-way pin socket (to be soldered by the user)
4x Self-adhesive dome bumpers
Project Page
Elektor Labs
The HDS242 is a portable 2-in-1 multifunctional tester, which can be used as a 2-ch oscilloscope and multimeter. It features a high-contrast 3.5-inch color display suitable for outdoor facility maintenance, rapid on-site measurement, automobile maintenance, power detection. etc.
Features
Oscilloscope + Multimeter
3.5-inch high-resolution, high-contrast color LCD display – suitable for outdoor use
18650 lithium battery – can work continuously for up to 6 hours
USB-C interface – support power bank and PC connection
Self-calibration function
SCPI supported – facilitate secondary development
Specifications
Oscilloscope
Bandwidth
40 MHz
Channels
2-ch Oscilloscope
Sample Rate
250 MSa/s
Acquisition Model
Normal, Peak detect
Record Length
8K
Display
3.5-inch LCD
Waveform Refresh Rate
10,000 wfrms/s
Input Coupling
DC, AC, and Ground
Input Impedance
1 MΩ ±2%, in parallel with 16pF ±10pF
Probe Attenuation Factors
1X, 10X, 100X, 1000X, 10000X
Max. Input Voltage
400 V (DC+AC, PK-PK, 1MΩ input impedance) (10:1 probe attenuation)
Bandwidth Limit (typical)
20 MHz
Horizontal Scale
5ns/div - 1000s/div, step by 1 - 2 - 52ns/div - 1000s/div, step by 1 - 2 - 55ns/div - 1000s/div, step by 1 - 2 - 52ns/div - 1000s/div, step by 1 - 2 - 5
Vertical Sensitivity
10mV/div - 10V/div
Vertical Resolution
8 bits
Trigger Type
Edge
Trigger Modes
Auto, Normal, single
Automatic Measurement
Frequency, Period, Amplitude, Max, Min, Mean, PK-PK
Cursor Measurement
ΔV, ΔT, ΔT & ΔV between cursors
Multimeter
Max. Resolution
20,000 counts
Testing Mode
Voltage, Current, Resistance, Capacitance, Diode, and Continuity test
Input Impedance
10 MΩ
Max Input Voltage
AC: 750 V | DC: 1000 V
Max Input Current
DC: 10 A | AC: 10 A
Diode
0-2 V
Other
Connectivity
USB Type-C
Dimensions
198 x 96 x 38 mm (7.68 x 3.74 x 1.5')
Weight
600 g (without batteries)
Included
1x OWON HDS242 Oscilloscope
1x Soft Bag
1x Probe
1x Power Cord
1x Probe Adjust
1x USB Cable
1x Power Adapter
1x Pair of Multimeter Probe Leads (red one and black one)
1x Pair of Oscilloscope Probe Leads (BNC to Alligator Clip)
1x User Manual (English)
Downloads
User Manual
SCPI Protocol
Quick Guide
PC Software
KI in der Praxis
Tauchen Sie ein in die faszinierende Welt der Robotik und Automatisierung!
Dieses Elektor Special zeigt, wie Sie mit Kreativität, etwas Know-how und günstiger Technik eigene Roboter bauen können. Vom ersten DIY-Projekt mit Arduino oder Raspberry Pi bis hin zu intelligenten Systemen mit KI – dieses Heft macht moderne Robotik verständlich und greifbar.
Entdecken Sie praxisnahe Anleitungen, inspirierende Projekte und spannende Einblicke in die Maker-Szene. Lernen Sie, wie aus Experimentierfreude, Gemeinschaft und Offenheit echte Innovation entsteht – und warum Robotik weit mehr ist als nur ein technisches Hobby.
Inhalt
Phantasie wird Realität
Arduino-controlled Drawing Robot
GalaxyRVR Mars Rover Kit for Arduino
YDLIDAR X4Pro Lidar
xHuskyLens AI Camera
DOF Robot Arm mit Raspberry Pi Pico
Fertigungsroboter mit Fischertechnik
Pneumatischer Industrieroboter
Warum bauen wir immer wieder Roboterhunde?
Elektor Mini-Wheelie
Roboterfahrzeuge und autonomes Fahren