WCH CH32V307 RISC-V development board features 8 UART ports controlled over Ethernet The CH32V307 is an interconnected microcontroller, based on 32-bit RISC-V core, with hardware stack area and fast interrupt entry. Compared with standard RISC-V, the interrupt response speed is greatly improved. With single-precision float point instruction sets added and stack area extended, the CH32V307 has higher performance, the number of U(S)ART is extended to 8, and the number of motor timer is extended to 4. The CH32V307 provides USB2.0 high-speed interface (480 Mbps) and has built-in PHY transceiver. Ethernet MAC is upgraded to GbE and integrates 10M PHY module. Features RISC-V4F processor, max 144 MHz system clock frequency Single-cycle multiplication and hardware division, hardware float point unit (FPU) 64KB SRAM, 256 KB Flash Supply voltage: 2.5 V/3.3 V, GPIO unit is supplied independently Multiple low-power modes: sleep/stop/standby Power-on/power-down reset (POR/PDR), programmable voltage detector (PVD) 2 general DMA controllers, 18 channels in total 4 amplifiers Single true random number generator (TRNG) 2x 12-bit DAC 2-unit 16-channel 12-bit ADC, 16-channel TouchKey 10 timers USB2.0 full-speed OTG interface USB2.0 high-speed host/device interface (built-in 480 Mbps PHY) 3 USARTs, 5 UARTs 2 CAN interfaces (2.0B active) SDIO interface, FSMC interface, DVP 2x I²C, 3x SPI, 2x I²S 80 I/O ports, can be mapped to 16 external interrupts CRC calculation unit, 96-bit unique chip ID Serial 2-wire debug interface Packages: LQFP64M, LQFP100 Downloads Datasheet GitHub
Over 180 Projects with Raspberry Pi, Pico W, Arduino, and ESP32
This bundle contains the Universal Maker Sensor Kit, which consists of many sensors, actuators, displays, and motors. It’s perfect for environmental monitoring, smart home projects, robotics, and game controllers.
The new Elektor book describes the design of many projects using the kit together with the popular Raspberry Pi, Raspberry Pi Pico W, Arduino Uno, and the ESP32 family of development boards. You can choose any of these development boards for your projects and either use the provided programs as they are, or modify these programs to suit your applications.
This bundle contains:
NEW Book: Universal Maker Sensor Kit (normal price: €45)
Universal Maker Sensor Kit (for Raspberry Pi, Pico W, Arduino, ESP32) (normal price: €70)
Raspberry Pi Pico W (normal price: €8)
Book: Universal Maker Sensor Kit
Learn to use more than 35 Sensors and Actuators with C++, Python, and MicroPython
This book contains over 180 projects for all four major development boards (Arduino, Raspberry Pi, Pico W, and ESP32). Depending on the development board, projects are available in the C, Python, or MicroPython programming languages.
The project titles, brief descriptions, wiring diagrams, and full program listings together with their detailed descriptions are given in the guide.
Universal Maker Sensor Kit (for Raspberry Pi, Pico W, Arduino, ESP32)
Discover endless creativity with the Universal Maker Sensor Kit, designed for use with Raspberry Pi, Pico W, Arduino, and ESP32. This versatile kit offers compatibility across popular development platforms, including Arduino Uno R4 Minima/WiFi, Uno R3, Mega 2560, Raspberry Pi 5, 4, 3B+, 3B, Zero, Pico W, and ESP32.
Featuring over 35 sensors, actuators, and displays, it's perfect for projects ranging from environmental monitoring and smart home automation to robotics and interactive gaming. Step-by-step tutorials in C/C++, Python, and MicroPython guide beginners and experienced makers alike through 169 exciting projects.
Features
Wide Compatibility: Fully supports Arduino (Uno R3, Uno R4 Minima/WiFi, Mega 2560), Raspberry Pi (5, 4, 3B+, 3B, Zero, Pico W), and ESP32, enabling extensive flexibility across numerous development platforms. Includes instructions for building 169 projects.
Comprehensive Components: Features more than 35 sensors, actuators, and display modules suitable for diverse projects such as environmental monitoring, smart home automation, robotics, and interactive game controllers.
Detailed Tutorials: Provides clear, step-by-step tutorials covering Arduino, Raspberry Pi, Pico W, ESP32, and each included component. Tutorials are available in C/C++, Python, and MicroPython, catering effectively to both beginners and experienced makers.
Suitable for All Skill Levels: Offers structured projects designed to guide users seamlessly from beginner to advanced proficiency in electronics and programming, enhancing creativity and technical expertise.
Included
Breadboard
Button Module
Capacitive Soil Moisture Module
Flame Sensor Module
Gas/Smoke Sensor Module (MQ2)
Gyroscope & Accelerometer Module (MPU6050)
Hall Sensor Module
Infrared Speed Sensor Module
IR Obstacle Avoidance Sensor Module
Joystick Module
PCF8591 ADC DAC Converter Module
Photoresistor Module
PIR Motion Module (HC-SR501)
Potentiometer Module
Pulse Oximeter and Heart Rate Sensor Module (MAX30102)
Raindrop Detection Module
Real Time Clock Module (DS1302)
Rotary Encoder Module
Temperature Sensor Module (DS18B20)
Temperature and Humidity Sensor Module (DHT11)
Temperature, Humidity & Pressure Sensor (BMP280)
Time of Flight Micro-LIDAR Distance Sensor (VL53L0X)
Touch Sensor Module
Ultrasonic Sensor Module (HC-SR04)
Vibration Sensor Module (SW-420)
Water Level Sensor Module
I²C LCD 1602
OLED Display Module (SSD1306)
RGB LED Module
Traffic Light Module
5 V Relay Module
Centrifugal Pump
L9110 Motor Driver Module
Passive Buzzer Module
Servo Motor (SG90)
TT Motor
ESP8266 Module
JDY-31 Bluetooth Module
Power Supply Module
Documentation
Online Tutorial
With the NodeMCU-ESP32, comfortable prototyping is possible with simple programming via Luascript or the Arduino IDE and the breadboard-compatible design. This board has 2.4 GHz dual-mode Wifi and a BT wireless connection. In addition, a 512 KB SRAM and a 4 MB memory are integrated on the microcontroller development board. The board has 21 pins for interface connection, including I²C, SPI, UART, DAC and ADC. Specifications Type ESP32 Processor Tensilica LX6 Dual-Core Clock Frequency 240 MHz SRAM 512 kB Memory 4 MB Wireless Lan 802.11 b/g/n Frequency 2.4 GHz Bluetooth Classic / LE Data Interfaces UART / I²C / SPI / DAC / ADC Operating Voltage 3.3 V (operable via 5 V microUSB) Operating Temperature –40°C – 125°C Dimensions 48 x 26 x 11.5 mm Weight 10 g Downloads Manual
Ocean Sound Generator
The Elektor Surf Synthesizer convincingly imitates the sound of breaking waves. It is based on a circuit published in the 1972 summer edition of Elektor to celebrate the Summer Olympics held that year in Munich, Germany. The Surf Synthesizer can be considered a real analog music synthesizer, as it follows the paradigm of voltage-controlled subtractive sound synthesis made popular by Robert Moog and friends (remember the Elektor Formant?). Instead of a VCO (voltage-controlled oscillator), it has a noise generator as a sound source. A VCF (voltage-controlled filter) and a VCA (voltage-controlled amplifier) modulated by three LFOs (low-frequency oscillators) shape the sound of the waves.
The Surf Synthesizer comes as an easy-to-build kit using only through-hole components. The kit contains all the required parts, including a stylish wooden stand. First mount all the parts on the front side (showing the schematic). Terminate by mounting the battery holder on the backside (showing the circuit description).
The use of headphones (not included) is recommended for obtaining the best sound quality.
A 9 V (PP3) battery (not included) powers the Surf Synthesizer.
Component List
Resistors (5%, 0.25 W)
R30 = 100 Ω
R1 = 470 Ω
R39 = 560 Ω
R36 = 680 Ω
R26 = 1 kΩ
R35 = 2.2 kΩ
R18 = 4.7 kΩ
R2, R5, R6, R9, R10, R13 = 6.8 kΩ
R16, R37, R38 = 10 kΩ
R14, R24 = 22 kΩ
R15 = 33 kΩ
R7, R20 = 39 kΩ
R11, R19, R21, R28 = 47 kΩ
R4, R12, R17, R23, R25, R31, R32, R33, R34 = 68 kΩ
R22 = 100 kΩ
R8 = 180 kΩ
R3 = 270 kΩ
R29 = 680 kΩ
R27 = 1 MΩ
P1, P2 = 50 kΩ trimmer
Capacitors
C13 = 4.7 nF
C11 = 47 nF
C12 = 100 nF
C10 = 220 nF
C9, C14, C15, C17, C19 = 10 µF, 16 V, 2 mm pitch
C2, C3, C4, C5, C6, C7 = 47 µF, 16 V, 2 mm pitch
C1, C8, C16, C18 = 100 µF, 16 V, 2.5 mm pitch
Semiconductors
D1, D2 = 1N4148
D3 = BAT48
T1, T2, T3, T4, T5, T6, T7, T8, T9, T10 = BC547C
Divers
BAT1 = PP3 9 V battery holder (battery not included)
K1 = speaker 8 Ω, 200 mW
S1 = slide switch
Elektor PCB 240095-1
Wooden stand
Specifications
Power
9 V, 100 mW
Dimensions
170 x 140 x 70 mm
Weight
250 g
The GT-7U GPS module, with its high sensitivity, low power consumption, miniaturization, and its extremely high tracking sensitivity, delivers an extended area of coverage. In an area that the conventional GPS receiver would fail, such as narrow urban sky, dense Jungle environment, GT-7U can achieve high-precision positioning.
Its compact size makes it suitable for applications in vehicles, mobile phones, video cameras, and other mobile positioning systems, and it is an excellent choice for GPS applications.
Specifications
Operating Frequency
L1 (1575.42 ±10 MHz)
Operating Voltage
3.3-5.2 V
Operating Current
Normal Mode: 50 mA
Power-Saving Mode: 30 mA
Communication Interface
TTL serial port, microUSB interface
Serial Port Baud Rate
9600 bps
Communication format
8N1
Interface Logic Voltage
3.3 or 5 V
External Antenna Inteface
IPX
Dimensions
22 x 21 x 5 mm
Weight
8.5 g
This RC522 RFID Kit includes a 13.56 MHz RF reader module that uses an RC522 IC and two S50 RFID cards to help you learn and add the 13.56 MHz RF transition to your project. The MF RC522 is a highly integrated transmission module for contactless communication at 13.56 MHz. RC522 supports ISO 14443A/MIFARE mode. The module uses SPI to communicate with microcontrollers. The open-hardware community already has a lot of projects exploiting the RC522 – RFID Communication, using Arduino. Features Operating Current: 13-26 mA/DC 3.3 V Idle Current: 10-13 mA/DC 3.3 V Sleep Current: <80 uA Peak Current: <30 mA Operating Frequency: 13.56 MHz Supported card types: mifare1 S50, mifare1 S70 MIFARE Ultralight, Mifare Pro, MIFARE DESFire Environmental Operating Temperature: -20-80 degrees Celsius Environmental Storage Temperature: -40-85 degrees Celsius Relative humidity: relative humidity 5% -95% Reader Distance: ≥50 mm/1.95' (Mifare 1) Module Size: 40×60 mm/1.57*2.34' Module interfaces SPI Parameter Data transfer rate: maximum 10 Mbit/s Included 1x RFID-RC522 Module 1x Standard S50 Blank Card 1x S50 special-shaped card (as shown by the keyring shape) 1x Straight Pin 1x Curved Pin Downloads Arduino Library MFRC522 Datasheet MFRC522_ANT Mifare S50
LILYGO T-Display-S3 ESP32-S3 1.9-inch ST7789 LCD Display Development Board WiFi Bluetooth 5.0 Wireless Module 170x320 Resolution
T-Display-S3 is a development board whose main control chip is ESP32-S3. It is equipped with a 1.9-inch LCD color screen and two programmable buttons. Communication using the I8080 interface Retains the same layout design as T-Display. You can directly use ESP32S3 for USB communication or programming.
Specifications
MCU
ESP32-S3R8 Dual-core LX7 microprocessor
Wireless Connectivity
Wi-Fi 802.11, BLE 5 + BT Mesh
Programming Platform
Arduino IDE Micropython
Flash
16 MB
PSRAM
8 MB
Bat voltage detection
IO04
Onboard functions
Boot + Reset + IO14 Button
Display
1.9" diagonal, Full-color TFT LCD
Drive Chip
ST7789V
Resolution
170 x 320 (RGB) 8-Bit Parallel Interface
Working power supply
3.3 V
Support
STEMMA QT/Qwiic
Connector
JST-GH 1.25 mm 2-pin
Downloads
Pinout
GitHub
The Elektor ESP32 Energy Meter is a device designed for real-time energy monitoring and smart home integration. Powered by the ESP32-S3 microcontroller, it offers robust performance with modular and scalable features.
The device uses a 220 V-to-12 V step-down transformer for voltage sampling, ensuring galvanic isolation and safety. Its compact PCB layout includes screw-type terminal blocks for secure connections, a Qwiic connector for additional sensors, and a programming header for direct ESP32-S3 configuration. The energy meter is compatible with single-phase and three-phase systems, making it adaptable for various applications.
The energy meter is simple to set up and integrates with Home Assistant, offering real-time monitoring, historical analytics, and automation capabilities. It provides accurate measurements of voltage, current, and power, making it a valuable tool for energy management in homes and businesses.
Features
Comprehensive Energy Monitoring: Get detailed insights into your energy usage for smarter management and cost savings.
Customizable Software: Tailor functionality to your needs by programming and integrating custom sensors.
Smart Home Ready: Compatible with ESPHome, Home Assistant, and MQTT for full Smart Home integration.
Safe & Flexible Design: Operates with a 220 V-to-12 V step-down transformer and features a pre-assembled SMD board.
Quick Start: Includes one Current Transformer (CT) sensor and access to free setup resources.
Specifications
Microcontroller
ESP32-S3-WROOM-1-N8R2
Energy Metering IC
ATM90E32AS
Status Indicators
4x LEDs for power consumption indication2x Programmable LEDs for custom status notifications
User Input
2x Push buttons for user control
Display Output
I²C OLED display for real-time power consumption visualization
Input Voltage
110/220 V AC (via step-down transformer)
Input Power
12 V (via step-down transformer or DC input)
Clamp Current Sensor
YHDC SCT013-000 (100 A/50 mA) included
Smart Home Integration
ESPHome, Home Assistant, and MQTT for seamless connectivity
Connectivity
Header for programming, Qwiic for sensor expansion
Applications
Supports single-phase and three-phase energy monitoring systems
Dimensions
79.5 x 79.5 mm
Included
1x Partly assembled board (SMDs are pre-mounted)
2x Screw terminal block connerctors (not mounted)
1x YHDC SCT013-000 current transformer
Required
Power transformer not included
Downloads
Datasheet (ESP32-S3-WROOM-1)
Datasheet (ATM90E32AS)
Datasheet (SCT013-000)
Frequently Asked Questions (FAQ)
From Prototype to Finished Product
What started as an innovative project to create a reliable and user-friendly energy meter using the ESP32-S3 microcontroller has evolved into a robust product. Initially developed as an open-source project, the ESP32 Energy Meter aimed to provide precise energy monitoring, smart home integration and more. Through meticulous hardware and firmware development, the energy meter now stands as a compact, versatile solution for energy management.
The TV-B-Gone universal remote control allows you to turn virtually any TV On or OFF. You control when you see TV, rather than what you see. The TV-B-Gone Keychain remote is so small that it easily fits in your pocket so that you have it handy whenever you need it, wherever you go: bars, restaurants, laundromats, ballparks, arenas, etc.The TV-B-Gone Kit is a great way to teach about electronics. When soldered together, it allows you to turn off almost any television within 150 feet or more. It works on over 230 total power codes – 115 American/Asian and another 115 European codes. You can select which zone you want during kit assembly.This is an unassembled kit which means that soldering and assembly is required – but it’s very easy and a great introduction to soldering in general.This kit makes the popular TV-B-Gone remote more fun because you created it yourself with some basic soldering and assembly! Show your friends and family how technologically savvy you are, and entertain them with the power of the TV-B-Gone!The kit is powered by 2x AA batteries and the output comes from 2x narrow beam IR LEDs and 2x wide-beam IR LEDs.IncludedAll required parts/componentsRequiredTools, soldering iron, and batteriesDownloadsGitHub
The Throwing Star LAN Tap Pro is a passive Ethernet tap, requiring no power for operation. There are active methods of tapping Ethernet connections (e.g., a mirror port on a switch), but none can beat passive taps for portability. To the target network, the Throwing Star LAN Tap looks just like a section of cable, but the wires in the cable extend to the monitoring ports in addition to connecting one target port to the other.The monitoring ports (J3 and J4) are receive-only; they connect to the receive data lines on the monitoring station but do not connect to the station’s transmit lines. This makes it impossible for the monitoring station to accidentally transmit data packets onto the target network.The Throwing Star LAN Tap Pro is designed to monitor 10BASET and 100BASETX networks. It is not possible for an unpowered tap to perform monitoring of 1000BASET (Gigabit Ethernet) networks, so the Throwing Star LAN Tap intentionally degrades the quality of 1000BASET target networks, forcing them to negotiate a lower speed (typically 100BASETX) that can be passively monitored. This is the purpose of the two capacitors (C1 and C2).Like all passive LAN Taps, the Throwing Star LAN Tap Pro degrades signal quality to some extent. Except as described above for Gigabit networks, this rarely causes problems on the target network. In situations where very long cables are in use, the signal degradation could reduce network performance. It is a good practice to use cables that are not any longer than necessary.DownloadsOpen source design files
Differences between micro:bit v1 and micro:bit v2 The BBC micro:bit v2 is equipped with BLE Bluetooth 5.0 It has a Power off button(push and hold power button) MEMS microphone with a LED indicator Onboard speaker Touch-sensitive logo pin LED power indicator A notched edge connector for easier connections.
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
This 0.96-inch monochrome graphical OLED display, with a resolution of 128 x 32 pixels, is mounted on a 28 x 28 mm PCB. The active display area is 11 x 23 mm. It includes a 4-pin connector that supports the I²C bus (with SCL and SDA signals). The display is compatible with both 5 V and 3.3 V applications.
Specifications
Display size: 0.96"
Resolution: 128 x 32 pixels
Board size: 28 x 28 mm
Effective display surface: 11 x 23 mm
Visual angle: >160°
Input voltage: 3.3 V ~ 6 V
Wide voltage support: 3.3 V, 5 V
Viewing angle: >160°
Drive IC: SSD1306
Operating temperature: -30 to 80°C
I²C
Signals: SCL, SDA
I²C address: 0x78 (or 0x3c, default) or 0x7a (or 0x3d).
Note: I²C addresses can (unfortunately) be specified in two ways: including R/W bit or not. Therefore 0x78 (0x7a) including the R/W bit is equal to 0x3c (0x3d) without R/W bit.
OLED Advantages
Smaller volume
Ultra-low power consumption
High Contrast
Display dot self-luminous
Wide voltage support
Warning: The display’s glass is fragile, please be careful while handling it. If the glass is broken, the screen will not work well.
ILI9341 is a 262144-color single-chip SOC driver for a TFT liquid crystal display with resolution of 240x320 dots (RGB), comprising a 720-channel source driver, a 320-channel gate driver, 172800 bytes GRAM for graphic display data of 240x320 dots (RGB), and power supply circuit.ILI9341 supports parallel 8-/9-/16-/18-bit data bus MCU interface, 6-/16-/18-bit data bus RGB interface and 3-/4-line serial peripheral interface (SPI).The moving picture area can be specified in internal GRAM by window address function. The specified window area can be updated selectively, so that moving picture can be displayed simultaneously independent of still picture area.ILI9341 can operate with 1.65V ~ 3.3V I/O interface voltage and an incorporated voltage follower circuit to generate voltage levels for driving an LCD.ILI9341 supports full color, 8-color display mode and sleep mode for precise power control by software and these features make the ILI9341 an ideal LCD driver for medium or small size portable products such as digital cellular phones, smart phone, MP3 and PMP where long battery life is a major concern.Features
Display resolution: 240 x 320 (RGB)
Output: 720 source outputs | 320 gate outputs | Common electrode output (VCOM)
a-TFT LCD driver with on-chip full display RAM: 172,800 bytes
System Interface
8-bits, 9-bits, 16-bits, 18-bits interface with 8080-Ⅰ/8080- Ⅱ series MCU
6-bits, 16-bits, 18-bits RGB interface with graphic controller
3-line / 4-line serial interface
Display mode:
Full color mode (Idle mode OFF): 262K-color
Reduced color mode (Idle mode ON): 8-color
Power saving modes:
Sleep mode
Deep standby mode
On chip functions:
VCOM generator and adjustment
Timing generator
Oscillator
DC/DC converter
Line/frame inversion
1 preset Gamma curve with separate RGB Gamma correction
Content Adaptive Brightness Control
MTP (3 times):
8-bits for ID1, ID2, ID3
7-bits for VCOM adjustment
Low-power consumption architecture
Low operating power supplies:
VDDI = 1.65V ~ 3.3V (logic)
VCI = 2.5V ~ 3.3V (analog)
LCD Voltage drive:
Source/VCOM power supply voltage
AVDD - GND = 4.5V ~ 5.5V
VCL - GND = -2.0V ~ -3.0V
Gate driver output voltage
VGH - GND = 10.0V ~ 20.0V
VGL - GND = -5.0V ~ -15.0V
VGH - VGL 3 ≦ 2V
VCOM driver output voltage
VCOMH = 3.0V ~ (AVDD – 0.5)V
VCOML = (VCL+0.5)V ~ 0V
VCOMH - VCOML ≦ 6.0V
Operate temperature range: -40℃ to 85℃
The Elektor Quasi-Analog Clockwork (Dimensions: 160 x 245 mm) is a digital clock with an analog look and feel.
The clock consists of 144 3-mm LEDs in a circle, indicating 12 hours with a 5-minute resolution. 11 standard logic ICs are used. All components in the kit are through hole.
The circuit uses standard HC-logic and still one 4000-logic IC (CD4060), a 32.768 kHz quarts reference clock and a 5 V power supply. Any small 5 VDC adapter (not included) can be connected via a small screw-terminal block on the board.
The quasi-analogue clockwork uses 144 LEDs (light emitting diodes) to indicate the time on a round, quasi-analogue dial with a diameter of about 143 mm. One of twelve green LEDs lights at maximum intensity to mark the hours, while the other eleven are dimmed. Between two green LEDs sit 11 red LEDs, each of which represents a period of five minutes. In this way, the time is indicated with an accuracy of five minutes. This would seem to be enough in view of the mostly decorative function of the present clockwork.
Construction of the clock is fairly easy as all components are through hole. A detailed description of how to build the Quasi-Analog Clockwork can be found in the manual of this kit. It can be downloaded here. Please read the manual before heating up the soldering iron!
Specifications
Time display
12 hours in a circle
Display
144 LEDs
LED circle
132 red LEDs, 12 green LEDs
Resolution display
5 minutes
Seconds indication
1 LED in center of circle, blinking at 0.5 Hz
Technology
10 HC-logic series IC’s, 1x 4000-logic series IC
Reference signal
32 kHz quartz oscillator (adjustable)
Set clock
1 push button, 5 minutes step
Power supply
5 V (Power Supply not included)
Dimensions
160 x 245 mm
Included
Elektor PCB 240118-1
All Components
Wooden Stand
Bill of Materials
Resistors
R1, R22, R24 = 2.2 kΩ
R2 = 390 kΩ
R3, R5, R6, R7 = 82 kΩ
R4 = 1 kΩ
R8-R19 = 8.2 kΩ
R20 = 20 MΩ
R21 = 330 kΩ
R23 = 560 Ω
R25 = 470 Ω
R26 = 100 kΩ
Capacitors
C1-C4, C8-C18 = 100 nF, 50 V
C5 =22 pF, 50 V
C6 = 10 pF, 50 V
C7 = 3-10 pF trimmer
Semiconductors
D1, D13, D25, D37, D49, D61, D73. D85, D97, D109, D121, D133 = LED, green, 3 mm
D2-D12, D14-D24, D26-D36, D38-D48, D50-D60, D62-D72, D74-D84, D86-D96, D98-D108, D110-D120, D122-D132, D134-D144, D162-D163 = LED, red, 3 mm
D145-D156 = 1N4148 DO-35
D164 = 1N4001 DO-41
T1, T2 = BC547B
IC1 = CD4060, DIP-16
IC2 = 74HC21, DIP-14
IC3, IC4 = 74HC132, DIP-14
IC5, IC6 = 74HC4024, DIP-14
IC7, IC8, IC9, IC10 = 74HC4051, DIP-16
IC11 = 7
Miscellaneous
K1 = 2-way PCB terminal block, 3.5 mm grid
S1 = 6 mm tactile pushbutton
X1 = 32.768 kHz crystal
Features
Built-in USB to TTL transfer chip
TTL interface output, easy to connect to the MCU
Status LED
Dual 3.3 V and 5 V power output, working with 3.3 V and 5 V target device
Size: 55 x 16 mm
This FTDI USB to TTL (3.3 V I/O) Serial Cable (FTDI TTL-232R-3V3 OEM) is a professional, high quality, high speed device which allows a simple and easy way to connect TTL interface devices using a spare USB port. Features TTL-232R-3V3 FTDI USB to TTL 3.3 V Serial Cable FTDI TTL-232R-3V3 Cable 6 Way The FTDI USB to TTL 3.3 V features a FTDI FT232R device integrated within the cable FTDI USB to TTL Serial 3.3 V Adapter Cable 6 Pin 0.1' Female Socket Header UART IC FT232RL Chip Compatible with Windows 7/8/10 and Linux
The Cleqee P1503E Multimeter Test Lead Kit is a reliable tool that provides safe and accurate measurements of electrical performance. Compatible with multimeters, clamp meters and other test instruments, this kit ensures versatility and precision for a wide range of testing applications.
With removable tips, banana plugs, crocodile clips and cable lugs, the kit offers extended testing capabilities and flexibility. The rubber-coated surfaces provide a secure and comfortable grip and improve stability even in slippery conditions.
The kit includes 8 interchangeable test probes – 4 in nickel-plated copper and 4 in gold-plated copper – specially designed to access the tightest spots, making them ideal for SMD testing. In addition, the insulated, flexible silicone gripping hooks act as an extra hand during testing, allowing sequential testing of components. The powerful spring mechanism ensures a firm grip on tiny components and minimizes the risk of short circuits.
Included
2x 1.4 mm Banana Plug Mutimeter Probe Test Leads, Length: 1 m (red & black)
Replaceable Needles Kit
4x Gilded sharp needle
4x Standard needle
2x Protective Cap (red & black)
2x U-Type Insert (red & black)
2x 2 mm inner spring to 4 Mmm male banana plug adapter (red & black)
2x Crocodile Clips (red & black)
2x IC testing hook (red & black)
1x 4 mm banana plug testing clip
The Elektor Milliohmmeter Adapter uses the precision of a multimeter to measure very low resistance values. It is an adapter that converts a resistance into a voltage that can be measured with a standard multimeter.
The Elektor Milliohmmeter Adapter can measure resistances below 1 mΩ using a 4-wire (Kelvin) method. It is useful for locating short circuits on printed circuit boards (PCB).
The adapter features three measurement ranges – 1 mΩ, 10 mΩ, and 100 mΩ – selectable via a slide switch. It also includes onboard calibration resistors. The Elektor Milliohmmeter Adapter is powered by three 1.5 V AA batteries (not included).
Specifications
Measurement ranges
1 mΩ, 10 mΩ, 100 mΩ, 0.1%
Power supply
3x 1.5 V AA batteries (not included)
Dimensions
103 x 66 x 18 mm (compatible with Hammond 1593N-type enclosure, not included)
Special feature
On-board calibration resistors
Downloads
Documentation
An alternative power supply for the Elektor Fortissimo-100 Power Amplifier
For those who object to a switch-mode power supply for the Fortissimo-100 Power Amplifier, this kit yields a linear, symmetrical, voltage regulator marked by low dropout voltage, high output current, and excellent stability – all obtained from discrete components.
Bearing in mind that nearly all high-performance audio power amplifiers benefit from a stabilized power supply, this linear power supply is specifically designed for a symmetrical output voltage of ±40 V and peak currents of 13 A (15 A peak achievable). As an example, the average current drawn by a Fortissmo-100 amp driving a 3 Ω load is 4 A per regulator.
Specifications
Input voltage range
52 V DC (low power usage) to 43 V DC
Output voltage range
approx. 38.9 V DC to 41.4 V DC (theoretically)38.6 V DC to 41.1 V DC (measured)
Dropout voltage at 6 A
42 V
Dropout voltage at 9.5 A
43 V
Dropout voltage at 13.5 A
44 V
Max. current
15 A peak (half sinewave), 4.8 A (average)
SOAR protection
15 A at 45 V DC in
Ripple rejection
>60 dB (@ 5 A DC load)
No-load input current
27 mA (@ 52 V DC input)
Included
PCB
All parts including heatsinks
NFC is a popular technology in recent years. Almost all the high-end phones in the market support NFC. Near field communication (NFC) is a set of standards for smartphones and similar devices to establish radio communication with each other by touching them together or bringing them into close proximity, usually no more than a few centimeters. This module is built around NXP PN532. NXP PN532 is very popular in the NFC area. Makerfabs developed this module based on the official document. A library for this module is available. Features Small dimension and easy to embed into your project Support I²C, SPI, and HSU (High-Speed UART), easy to change between those modes Support RFID reading and writing, P2P communication with peers, NFC with Android phone Up to 5~7 cm reading distance On-board level shifter, Standard 5 V TTL for I²C and UART, 3.3 V TTL SPI Arduino compatible, plugin and play with our shield RFID reader/writer supports Mifare 1k, 4k, Ultralight, and DESFire cards ISO/IEC 14443-4 cards such as CD97BX, CD light, Desfire, P5CN072 (SMX) Innovision Jewel cards such as IRT5001 cards FeliCa cards such as RCS_860 and RCS_854 Downloads Usage NFC Library
Here you will find all kinds of parts, components and accessories you will need in various projects, starting from simple wires, sensors and displays to already pre-assembled modules and kits.
