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Description。The SparkFun Multiplexer Breakout provides access to all pins and features of the 74HC4051， an 8-channel analog multiplexer/demultiplexer. The 74HC4051 allows you to turn four I/O pins into eight multifunctional， individually selectable signals， which can be used to do everything from driving eight LEDs to monitoring eight potentiometers.。The 74HC4051 can function as either a multiplexer or a demultiplexer， and it features eight channels of selectable inputs/outputs. The routing of common signal to independent I/O is set by digitally controlling three select lines， which can be set either high or low into one of eight binary combinations.。One half of the board breaks out the control signals(E， S0-S2)and common input/output(Z). The other side provides access to all eight independent I/O's(Y0-Y7). Both sides include supply and ground connections(VCC， VEE， GND).。Get Started with the 74HC4051 Breakout Guide。Features。Switches analog or digital signals。8 channels controlled by 3 select inputs。Wide voltage supply range：2 -- 10V。Bipolar supply support(e.g.， ±5V)。Optional enable input。Breadboard compatible breakout

。Description。The GD25Q40C(4M-bit)Serial flash supports the standard Serial Peripheral Interface(SPI)， and supports theDual/Quad SPI：Serial Clock， Chip Select， Serial Data I/O0(SI)， I/O1(SO)， I/O2(WP#)， and I/O3(HOLD#). The Dual I/O data is transferred with speed of 240Mbits/s and the Quad I/O & Quad output data is transferred with speed of 480Mbits/s.。Features。4M-bit Serial Flash。512K-byte。256 bytes per programmable page。Standard， Dual， Quad SPI。High Speed Clock Frequency。120MHz for fast read with 30PF load。Dual I/O Data transfer up to 240Mbits/s。Quad I/O Data transfer up to 480Mbits/s。Software/Hardware Write Protection。Minimum 100，000 Program/Erase Cycles。Data Retention。20-year data retention typical。Single Power Supply Voltage。Full voltage range：2.7～3.6V。Low Power Consumption。1μA typical deep power down current。1μA typical standby current

Description。The W25Q32FV(32M-bit)Serial Flash memory provides a storage solution for systems with limited space， pins， and power. This small SMD IC series offers flexibility and performance well beyond ordinary Serial Flash devices. They are ideal for code shadowing to RAM， executing code directly from Dual/Quad SPI(XIP)and storing voice， text and data.。The W25Q32FV operates on a single 2.7V to 3.6V power supply with current consumption as low as 4mA active and 1μA for power-down. We recommend using this IC with the SparkFun Qwiic Micro to expand its memory capabilities.。Features。32Mb of Memory。2.7V - 3.6V VCC。SOIC 8 Package。SPI/QSPI/QPI Interface。Volatile & Non-Volatile SR。Programmable Output Driver Strength。Individual Block/Sector Write Protection。104MHz Frequency。50μs， 3ms Write Cycle Time(word， page)

Description。Robots are fun， and Arduinos are easy. So wouldn't it be nice if there were kit that included everything you need to get your Arduino device set up to control simple two-motor-circuit buddy? The SparkFun Ardumoto Shield Kit is perfect for any robot enthusiast and includes an Ardumoto Shield， as well as pairs of tires， motors， connectors and wires. And， of course， it's all stuffed in classic SparkFun red box(which may come in handy as robot chassis).。The Ardumoto Shield is an easy-to-use dual-motor controller for Arduino. Combined with an Arduino， the Ardumoto makes fantastic controller platform for RC vehicles or even small autonomous robots. At the heart of the Ardumoto --- the big， black chip right in the middle --- is an L298， one of our favorite dual-channel motor drivers around， capable of driving up to 2A per channel. The board takes its power from the same Vin line as the Arduino board and includes blue and yellow LEDs to indicate active direction. All driver lines are diode protected from back EMF.。Note：The motors included with this kit are not compatible with the Wheel Encoder kit. Sorry for the inconvenience.。Get Started with the SparkFun Ardumoto Kit Guide

Description。The SCD30 from Sensirion is a high quality Nondispersive Infrared(NDIR)based CO2 sensor capable of detecting 400 to 10000ppm with an accuracy of ±(30ppm+3%). In order to improve accuracy the SCD30 has temperature and humidity sensing built-in， as well as commands to set the current altitude. For additional accuracy the SCD30 also accepts ambient pressure readings!。We've written an Arduino library to make reading the CO2， humidity， and temperature very easy. It can be downloaded through the Arduino Library manager：search for 'SparkFun SCD30' or it can be found in the。Documents。tab above.。The SCD30 Humidity and Temperature Sensor can also be automatically detected， scanned， configured， and logged using the OpenLog Artemis datalogger system. No programming， soldering， or setup required!。Note：The SCD30 has an automatic self-calibration routine. Sensirion recommends 7 days of continuous readings with at least 1 hour a day of 'fresh air' for self-calibration to complete.。Features。Power supply voltage：3.3V - 5.5V。NDIR CO2 sensor technology。Integrated temperature and humidity sensor。Best performance-to-price ratio。Dual-channel detection for superior stability。Small form factor：35 mm×23 mm×7 mm。Measurement range：400 ppm - 10.000 ppm。Accuracy：±(30 ppm + 3%)。Current consumption：19 mA @ 1 meas. per 2 s.。Energy consumption：120 mJ @ 1 measurement。Fully calibrated and linearized。Digital interface UART or I2C

Description。This is not your normal Passive Infrared(PIR)sensor! The SparkFun AK9753 Human Presence Sensor Breakout is a Qwiic-enabled， 4-channel Nondispersive Infrared(NDIR)sensor. Each channel has a different field of view， so not only can the AK9753 detect a human， but it can also tell which direction the person is moving. To make it even easier to use this breakout， all communication is enacted exclusively via I2C， utilizing our handy Qwiic system. However， we still have broken out 0.1" spaced pins in case you prefer to use a breadboard.。The onboard AK9753 is a digital sensor giving you a 16-bit digital value over I2C. Each of the four sensors outputs the IR current in pico-amps. A PIR reading can vary from roughly -200(no human present)to 1500 when a human is detected standing in front of a given channel， but it varies due to environmental factors and other heat sources in view. We've written a full library to control the sensor and included examples showing how to output the sensor readings you need， making this breakout even easier to handle!。Note：The I2C address of the AK9753 is 0x64 and is jumper selectable to 0x65 or 0x67. A multiplexer/Mux is required to communicate to multiple AK9753 sensors on a single bus. If you need to use more than one AK9753 sensor consider using the Qwiic Mux Breakout.。The SparkFun Qwiic connect system is an ecosystem of I2C sensors， actuators， shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch， 4-pin JST connector. This reduces the amount of required PCB space， and polarized connections mean you can't hook it up wrong.。Get Started with the Human Presence Sensor Breakout Guide。Features。Qwiic-Connector Enabled。Quad infrared sensor module。16-bit reading on all four channels。Digital I2C Interface。Voltage：1.7V to 3.3V。Extremely low current：100μA