Waveshare

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US$24.98
This is a sound card HAT designed for Raspberry Pi, low power consumption, supports stereo encoding / decoding, features Hi-Fi playing / recording, what's more, it can directly drive speakers to play music.
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US$24.95

WIFI232-B2 is a high performance UART WiFi module with shield case and external antenna. It is designed for occasions where large data flow is required and power consumption will not be a concern.

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US$30.79
This is a WiFi module evaluation kit designed for the WiFi module WIFI-LPB100-B. Features: What's onboard: USB to UART connector, RELOAD button, LED indicators, RESET button, WPS button. Indicators: POWER, READY, LINK, RXD, TXD, WPS. Also work as a USB to UART module by configuration.
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US$17.77
This is s a WiFi module with external antenna connector. Features: Independently developed MCU platform, high cost performance. Ultra low power consumption, suit for battery-powered applications. Supports UART/GPIO data interfaces. Supports Smart Link (APP provided). Firmware upgradable via wireless and remote, wireless batch configuration tool is also provided. Supports WPS configuration. Supports software power switch (reserved for the moment). SDK provided for secondary development.
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US$6.99

The Waveshare CAN Board SN65HVD230 features an accessory onboard CAN transceiver, which is pinout compatible with PCA82C250. It is powered from 3.3 V and features ESD protection. The SN65HVD230 CAN Board is ideal to connect microcontrollers to the CAN network. Designed for operation in especially-harsh environments, it features cross-wire protection, loss-of-ground and overvoltage protection, overtemperature protection, as well as wide common-mode range.

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US$5.41

Overview: Onboard audio power amplifier LM386. Audio signal gain up to 200. Adjustable accuracy. Signal output indicator. Specifications: Mic sensitivity : 52dB. Frequency range : 50Hz ~ 20KHz. Power: 3.3V ~ 5.3V. Mounting holes size: 2.0mm.

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US$5.41
Detects clockwise/anti-clockwise rotations: degrees and laps. Specifications: Pulses per lap: 15. Power: 3.0V ~ 5.3V. Dimension: 32.1mm * 15.4mm. Mounting holes size: 2.0mm. Applications: Positioning in Industrial Controls.
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US$17.70
Sensor Chip: TCS3200 (RGB color detector). Detects static color, the output is a square wave with frequency directly proportional to incident light intensity. Supports fill-light by onboard LEDs. Specifications: Power: 2.7V ~ 5.5V. Ideal detection distance: 10mm. Dimension: 36.0mm * 20.6mm. Mounting holes size: 2.0mm.
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US$13.99

0.96inch OLED, SPI/I2C interfaces, straight/vertical pinheader.

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US$26.59

Features: Raspberry Pi Camera, supports all revisions of the Pi. 5 megapixel OV5647 sensor in an adjustable-focus module. Camera specifications: CCD size : 1/4inch, Aperture (F) : 2.0, Focal Length : 6MM (adjustable), Diagonal : 75.7 degree, Sensor best resolution : 1080p. Dimension : 32mm × 32mm.

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US$8.39
The CP2102 USB UART Board (type A) is an accessory board that features the single-chip USB to UART bridge CP2102 onboard.
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US$11.78

Features: Original FT232RL onboard. Supports Mac, Linux, Android, WinCE, Windows 7/8/8.1/10... 3 power mode : 5V output, 3.3V output, or powered by target board (3.3V-5V). 3 LEDs: TXD LED, RXD LED, POWER LED.

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US$67.13
The Platform Cable USB a USB compatible cable for in-circuit configuration and programming of all Xilinx devices. It is compatible with the original XILINX Platform Cable USB.
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US$45.45

The USB Blaster Download Cable interfaces a USB port on a host computer to an Altera® FPGA mounted on a printed circuit board. The cable sends configuration data from the PC to a standard 10-pin header connected to the FPGA. You can use the USB Blaster cable to iteratively download configuration data to a system during prototyping or to program data into the system during production.

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US$15.39
The FT245 USB FIFO Board (type A) is an accessory board that provides a USB to parallel FIFO interface, with FT245 chip onboard, also features USB Type A connector, and control interface (8 data pins & 6 control pins). The FT245 USB FIFO Board (type A) is ideal for establishing communication between MCU and PC. There is also a jumper used for selecting VCC output level provided on the board.
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