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Buy Low Pass Filter Bass Subwoofer Preamp Amplifier Board Single Power DC 9-32V Preamplifier with Bass V for R310.00

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Micro:Bit Bluetooth 4.0 Low Energy Open Development Board For Programming Overview:The micro:bit is an open development board that allows you to run code on it and have access to all of the hardware.You can use your micro:bit for all sorts of cool creations, from robots to musical instruments ﾖ the possibilities are endless.This little device has an awful lot of features, like 25 red LED lights that can flash messages.There are two programmable buttons that can be used to control games or pause and skip songs on a playlist.Your micro:bit can detect motion and tell you which direction youﾒre heading in, and it can use a low energy Bluetooth connection to interact with other devices and the Internet.Features:- Nordic nRF5182216 MHz 32-bit ARM Cortex-M0 micro controller- Bluetooth? 4.0 low energy/2.4GHz RF SoC- 16kB RAM, 256kB Flash- Freescale KL26Z ﾖ 48 MHz ARM Cortex-M0 MCU- Compass ﾖ Freescale MAG3110 3-axis magnetometer, I2C interface- Accelerometer ﾖ Freescale MMA8652 3-axis accelerometer, I2C interface- Power connector ﾖ 3V power supply- Reset button ﾖ reset the system- Micro USB connector ﾖ for connecting PC, download code, serial communication, etc.- 5x5 LED display ﾖ 5x5 LED grid- Button A/B ﾖ programmable buttons- I/O connection pins ﾖ 5- I/O rings and 20-pin edge connector, including SPI, UART, I2C, Analog, PWM, etc.Specifications:Size: 5.1 x 4.3 x 1cmNet weight: 9gNotes:1. The micro:bit requires a USB cable for programming purposes, and a battery holder & 2x AAA batteries to power the micro:bit if not connected to your computer.2. The color of the package box will be random, thank you for your understanding.Software: Supports Microsoft PXT graphical editor available on Windows, macOS, iOS and Android online programming, needs no more compiler download/debug your code on PC via USB download/debug your code on mobile devices via Bluetooth Supports multi popular languages like Javasript, Phython, Mbed C, etc.Microsoft Touch Develop IDE Microsoft Blocks Code Kingdoms Javascript Micro Pythonmbed enabledFor more INFO., pls refer to WIKIPackage Included: 1x Micro:bit Development Board1x Safty guide

5Pcs A87 4 Channel Optocoupler Isolation Module High And Low Level Expansion Board For Arduino Description:1. Function: Use the low level to control the high level. Such as the use of single-chip 3V or 5V voltage control 9V or 12v voltage.2. HVCC should not exceed 24V. Output OUT1 / OUT2 / OUT3 / OUT4 output current equal to HVCC / 5.1K, absorption current 500ma.3. This module uses TLP281 chip (for Toshiba).4. Schematic:Input and output instructions: Input: IN1 / IN2 / IN3 / IN4, then the microcontroller or Arduino IO port, GND and the Arduino development board connected to the GND.IN1 / IN2 / IN3 / IN4 controls OUT1 / OUT2 / OUT3 / OUT4, respectively.Output: OUT1 / OUT2 / OUT3 / OUT4Output: HVCC: Connect the controlled high voltage positive, HGND connected to the controlled high voltage negativeUse: When IN1 is high, the corresponding OUT1 voltage is equal to HVCC, when IN1 is low, the OUT1 voltage is equal to HGNDUse examples The following example shows how to use the microcontroller's IO port to control the 24V motor rotation. Figure motor operating voltage of 24V,red ' ' that the motor power positive, black '-' that the motor power supply negative. When the microcontroller IO_0 output high, the motor rotate,when the IO_0 port output low, the motor stops rotating.Package included:5 x A87 4 Channel Optocoupler Isolation Module

Overview: The micro:bit is an open development board that allows you to run code on it and have access to all of the hardware. You can use your micro:bit for all sorts of cool creations, from robots to musical instruments – the possibilities are endless. This little device has an awful lot of features, like 25 red LED lights that can flash messages. There are two programmable buttons that can be used to control games or pause and skip songs on a playlist. Your micro:bit can detect motion and tell you which direction you’re heading in, and it can use a low energy Bluetooth connection to interact with other devices and the Internet. Features: - Nordic nRF5182216 MHz 32-bit ARM Cortex-M0 micro controller - Bluetooth? 4.0 low energy/2.4GHz RF SoC - 16kB RAM, 256kB Flash - Freescale KL26Z – 48 MHz ARM Cortex-M0+ MCU - Compass – Freescale MAG3110 3-axis magnetometer, I2C interface - Accelerometer – Freescale MMA8652 3-axis accelerometer, I2C interface - Power connector – 3V power supply - Reset button – reset the system - Micro USB connector – for connecting PC, download code, serial communication, etc. - 5x5 LED display – 5x5 LED grid - Button A/B – programmable buttons - I/O connection pins – 5 - I/O rings and 20-pin edge connector, including SPI, UART, I2C, Analog, PWM, etc. Specifications: Size: 5.1 x 4.3 x 1cm Net weight: 9g Notes: 1. The micro:bit requires a USB cable for programming purposes, and a battery holder & 2x AAA batteries to power the micro:bit if not connected to your computer. 2. The color of the package box will be random, thank you for your understanding. Software: Supports Microsoft PXT graphical editor available on Windows, macOS, iOS and Android online programming, needs no more compiler download/debug your code on PC via USB download/debug your code on mobile devices via Bluetooth Supports multi popular languages like Javasript, Phython, Mbed C, etc. Microsoft Touch Develop IDE Microsoft Blocks Code Kingdoms Javascript Micro Pythonmbed enabled For more INFO., pls refer to Package Included: 1x Micro:bit Development Board 1x Safty guide

- CNC Shield Board Version: 3.0 Color: Red Size(L*W*H): 68 x 53 x 18 mm Voltage: DC 12~36 V (At the moment only the DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.) Features: 1. Uses removable A4988 or DRV8825 compatible stepper drivers. 2. The extension board can be used for carving machine, 3 d printer driver expansion board 3. GRBL 0.8 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals) 4. PWM Spindle and direction pins,4-Axis support (X, Y, Z, A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13) 5. Compact design. Stepper Motors can be connected with 4 pin molex connectors or soldered in place. 6. Please note that this is an unassembled kit and Basic soldering skills are needed. - A4988 Stepper Motor Driver Color: Red Size(L*W*H): 20 x 15 x 10 mm Thermal shutdown circuitry: Yes Crossover-current protection: Yes Ground fault protection: Yes Load short-circuit protection: Yes Compatible logic supply: 3.3V and 5 V Five selectable step modes: full, 1/2, 1/4, 1/8 and 1/16 Features: 1. Mix with slow current decay modes. 2. Internal UVLO and Low RDS (On) Output. 3. Automatic current decay mode detection/selection. 4. Synchronous rectification for low power dissipation. 5. Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver. - Uno R3 Board MCU: ATmega328 Clock speed: 16 MHz USB interface: ATmega16U2 Operating voltage: 5 V I-I / O pin output current: 40 mA max 3.3 V output current: 150 mA max Digital I/O pins: 14 (including 6 with PWM capability) Analog input pins: 6 EEPROM: 1 kB Static RAM (SRAM): 2 kB Flash memory: 32 kB Size(L*W*H): 68 x 53 x 10 mm Click to download universal course Package included: 1 x Uno R3 Board 1 x CNC Shield Board 4 x A4988 Stepper Motor Driver 4 x Heat Sink 1 x USB Cable 1 x 40-Pin Row Needles

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Buy ESP32 Development Board WiFi+bluetooth Ultra Low Power Consumption Dual Cores ESP-32 ESP-32S Board G for R247.87

- CNC Shield Board Version: 3.0 Color: Red Size(L*W*H): 68 x 53 x 18 mm Voltage: DC 12~36 V (At the moment only the DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.) Features: 1. Uses removable A4988 or DRV8825 compatible stepper drivers. 2. The extension board can be used for carving machine, 3 d printer driver expansion board 3. GRBL 0.8 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals) 4. PWM Spindle and direction pins,4-Axis support (X, Y, Z, A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13) 5. Compact design. Stepper Motors can be connected with 4 pin molex connectors or soldered in place. 6. Please note that this is an unassembled kit and Basic soldering skills are needed. - A4988 Stepper Motor Driver Color: Red Size(L*W*H): 20 x 15 x 10 mm Thermal shutdown circuitry: Yes Crossover-current protection: Yes Ground fault protection: Yes Load short-circuit protection: Yes Compatible logic supply: 3.3V and 5 V Five selectable step modes: full, 1/2, 1/4, 1/8 and 1/16 Features: 1. Mix with slow current decay modes. 2. Internal UVLO and Low RDS (On) Output. 3. Automatic current decay mode detection/selection. 4. Synchronous rectification for low power dissipation. 5. Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver. - Uno R3 Board MCU: ATmega328 Clock speed: 16 MHz USB interface: ATmega16U2 Operating voltage: 5 V I-I / O pin output current: 40 mA max 3.3 V output current: 150 mA max Digital I/O pins: 14 (including 6 with PWM capability) Analog input pins: 6 EEPROM: 1 kB Static RAM (SRAM): 2 kB Flash memory: 32 kB Size(L*W*H): 68 x 53 x 10 mm Click to download universal course Package included: 3 x CNC Shield + UNO R3 Board + 4x A4988 Driver Kit

Description:   ESP32 integrates antenna switches, RF balun, power amplifiers, low noise amplifiers, filters and power management modules, and the entire solution occupies the least printed circuit board area. 2.4 GHz Wi-Fi plus Bluetooth dual-mode chip Using TSMC low-power 40nm technology, power performance and RF performance is the best, safe and reliable, easy to expand to a variety of applications. Use the documentation to download: https: //github.com/Nicholas3388/LuaNode User manual: https: //github.com/SmartArduino/SZDOITWiKi/wiki/ESP8266---ESP32   Feature:   Cost-effective small volume. Easy to embed into any product Powerful, support LWIP protocol, freertos Supports three modes: AP, STA, AP + STA coexistence mode Lua programming makes your development easier For more details click on the link: https: //github.com/espressif/arduino-esp32/blob/master/doc/windows.md Package included: 1 x WeMos® ESP32 WiFi + Bluetooth Development Board 2 x normal pin

(←please click here) (Due to the different batch,These board have two colors, Bule or Green, will be send in random, please note that before you buy it !!!) Suitable case: Parameter: LCD Type TFT LCD Interface SPI Touch Screen Type Resistive Touch Screen Controller XPT2046 Colors 65536 Backlight LED Resolution 320*480 (Pixel) Aspect Ratio 8:5 Power Consumption TBD Backlight Current TBD Operating Temp. (Centigrade) TBD Interface Definition: PIN NO. SYMBOL DESCRIPTION 1, 17 3.3V Power positive (3.3V power input) 2, 4 5V Power positive (5V power input) 3, 5, 7, 8, 10, 12, 13, 15, 16 NC NC 6, 9, 14, 20, 25 GND Ground 11 TP_IRQ Touch Panel interrupt, low level while the Touch Panel detects touching 18 LCD_RS Instruction/Data Register selection 19 LCD_SI / TP_SI SPI data input of LCD/Touch Panel 21 TP_SO SPI data output of Touch Panel 22 RST Reset 23 LCD_SCK / TP_SCK SPI clock of LCD/Touch Panel 24 LCD_CS LCD chip selection, low active 26 TP_CS Touch Panel chip selection, low active   Package included: 1 x 3.5 Inch 320 X 480 TFT LCD Display Touch Board

Advantages and characteristics: RF output frequency range: 54 MHz to 13600 MHz Fractional-N frequency division synthesizer and integer N frequency division synthesizer High resolution 38 bit modulus Frequency discrimination phase detector (PFD) with operating frequency up to 125 MHz The reference frequency is 600 MHz Maintain frequency lock-up from -40 ° C to + 85 ° C Low phase noise voltage controlled oscillator (VCO) Programmable 1/2/4/8/16/32/64 frequency division output Programmable dual modulus prescaler: 4/5 or 8/9 Programmable output power RF output mute function Analog and digital lock detection Module application: Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT) Point to point to point to multipoint microwave links Satellite /V-SAT Test equipment / instrument Clock generation Module features: 1. Power supply: ultra low noise LDO voltage regulator power supply, more greatly reduce stray and noise. Interface DC002 6v0.2A or so 2. The use of precision low-noise 125M differential crystal, higher CMRR and phase detection frequency. Reserved external clock interface. Package included: 1 x ADF5355 PLL 54M-13.6G Development Board

Description:   ESP32 is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters,  and power management module. The entire solution takes up the least amount of printed circuit board area. This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology, power and RF properties best, which is safe, reliable, and scalable to a variety of applications.   Features:   High performance-price ratio Small volume, easily embeded to other products Strong function with support LWIP protocol, Freertos Supporting three modes: AP, STA, and AP+STA Supporting Lua program, easily to develop Development Board:  Package included: 1 x ESP32 Development Board(unsoldered)      

This item is sold brand new. It is ordered on demand from our supplier and is usually dispatched in 10 to 15 working days. We urge you to please read shipping details before placing your order. --------------------------------------- 1) 1/3 SONY 42OTVL (3142+633) color CCD board camera 2) Scanning system: PAL/NTSC 3) Resolution: 420TVL 4) Low lux 5) Size: 38mm x 38mm --------------------------------------- See what else we're selling

Teensy++ 2.0 Compatible USB AVR Development Board For Arduino ISP AT90USB1286 Features: USB can be any type of device AVR processor, 16 MHz Single pushbutton programming Easy to use Teensy Loader application Free software development tools Works with Mac OS X, Linux & Windows Tiny size, perfect for many projects Available with pins for solderless breadboard Very low cost & low cost shipping options How to use: Teensy.exe can be downloaded directly from the Internet without having to install the driver, directly write, program and verification. Do not need to buy another expensive burner. You can also use the arduino IDE installation Teensy development environment. Note: This board does not original. Package included: 1 x Teensy++ 2.0 USB AVR Development Board