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Grove Base Shield for Photon is an expansion board which incorporated the standard Grove interfaces to let you build more powerful and intelligent applications with richer and cost-effective Grove functional modules. It gets three digital ports、two analog ports、two I2C ports and one UART port. It's a plug-and-play shield designed to accelerate prototyping dramatically.。Features。Compatible with Photon。Standard Grove interfaces to connect to a large family of Grove sensors and actuators。I2C、UART ports integrated。Specification。Grove Ports：3 digital ports、2 analog ports、2 I2C ports and 1 UART port.。Dimensions：53×53 mm。Weight：18g

The Arch Max v1.1 is a mbed enabled development board specially for rapid prototyping. It's based on an STM32F407VET6 microcontroller with an ARM Cortex-M4F core running at 168MHz. It provides serial wire debug](SWD)debug、drag-and-drop programming and USB serial communication. It provides a complete and straightforward development document for your projects.。Features。mbed enabled。Online development tools(include IDE)。Complete and straightforward C/C++ SDK。Massive examples and tutorials。High-performance STM32F407VET6。ARM Cortex-M4 MCU with FPU of 168MHz。512 KB Flash memory、192 KB RAM。On-board programming and debug。Drag-and-drop programming。USB serial communication。SWD debug with GDB+ pyOCD/OpenOCD、Keil or IAR。Arduino form factor、compatible with lots of shields。Built-in Ethernet port、USB and SD card slot for Internet connectivity and data exchange。Parameter。Work Voltage：5V。Microcontroller：STM32F407VET6。Flash Memory：512kB。RAM：192kB。UART：4。I2C：3。SPI：3。CAN：2。SDIO：1。Camera interface：1。Eth：1。ADC Channels：8。I/O pins：40。Digital I/O Max Input Voltage：5.0V。Diameter：90mm×44mm

The Grove Mini I2C motor driver is a very tiny motor driver with I2C interface、and it includes two motor driver chips - DRV8830、which helps you control two DC motors or winding of stepper motors on a small board simultaneously.。With four solderable pads back of the board、you can change the I2C address of each motor driver easily. Especially、with the onboard protection circuit、the max limitation current of each channel can be adjusted from 0.2A to 1A、you can set a proper limitation current according to the load.。It can be used for battery-powered toys、printers、and other low-voltage or battery-powered motion control applications due to the features.。Also、Grove Mini I2C motor driver is belong to Grove System、you can plug it onto the Base shield and work with Arduino directly without any jumper wires.。Features：Tiny driver board。Two motor driver channels。Working Voltage：2.75v 6.8v。Changeable max limitation current。Grove compatible。I2C interface。Easy to use

The Audio Hacker shield for Arduino allows you to perform realtime digital signal processing. Record audio samples into memory and play them back. Mix samples、manipulate audio、build audio effects、or synthesize entirely new sounds. All with Arduino programming!。High quality 12-bit ADC and 12-bit DAC. Realtime ADC sampling and output to DAC at 44.1 kHz.。256K SRAM for recording/playback of audio samples. No SD card is needed! High-speed SRAM allows fast access to audio data for realtime processing and mixing.。Record about 9 seconds of high quality audio at 22 kHz with 12-bit resolution to SRAM. Much longer samples can be recorded at lower frequency and/or resolution. See memory capacity below.。TS922IN op-amp provides high current output and up to 100X gain preamp for weak inputs.。Two onboard buttons for input、bypass switch、volume knob.。Connection for 3V battery backup to retain samples in memory.。Compatible with Arduino Uno、Duemilanove、Mega、and Leonardo. Uses digital pins 5-13.。Easy to assemble kit! Available assembled in limited quantities.。Features：Audio input and output 3.5mm stereo jacks and solder pads. The stereo input is converted to mono、and the output is always mono. Solder pads are provided for input and output in case you want to use different types of connectors。The bypass switch allows you to hear the input signal(after it has been converted to mono)on the output. This switch allows you to compare the original signal with the processed output of the Audio Hacker.。Small volume knob for the output level of the processed signal。Two buttons provided for user input. These are connected to digital pins 5 and 6.。Preamp gain allows you to amplify weak input signals. For inputs from an MP3 music player(e.g. iPod)or computer、this potentiometer should be set to its lowest level(no gain).。Battery connection allows you to keep your audio samples in non-volatile memory when power is disconnected. A simple 3V coin cell battery(e.g. CR2032)is sufficient to retain the memory contents. See this project for more details.