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Description。The CD40106BE consists of six Schmitt-trigger circuits. Each circuit functions as an inverter with Schmitt-trigger action on the input. The trigger switches at different points for positive- and negative-going signals. The difference between the positive-going voltage(VP)and the negative-going voltage(VN)is defined as hysteresis voltage(VH).。Features。Schmitt trigger action with no external components。Hysteresis voltage typ. at 0.9V at VDD = 5V， 2.3V at VDD = 10V， and 3.5V at VDD = 15V。Noise immunity greater than 50%。No limit on input rise and fall times。Standardised， symmetrical output characteristics。100% tested for quiescent current at 20sV。Maximum input current of 1μA at 18 V over full package temperature range； 100nA at 18V and 25℃。Low VDD to VSS current during slow input ramp

Description。This is the BC337， an NPN silicon BJT(Bipolar Junction Transistor). This little transistor can help in your project by being used to help drive large loads or amplifying or switching applications. The BC337 is specifically rated at 50V a

。Description。Sometimes we want our projects on， but sometimes we want to turn them off for a while to save power. The SparkFun Nano Power Timer will run while only consuming minimal power(approximately 35nA)and turn your project on after a set amount of time. When you are done polling your sensors， posting data to the web， writing to your logger， or planning world domination， your microcontroller can tell the Nano Power Timer to turn off the power. No more running your microcontroller all day when you only want to read the ambient temperature once per hour.。The TPL5110 delay is configured with the use of resistors. We've added a six-way DIP switch to select one of the five preinstalled resistors. The sixth switch is attached to a pad to add your own PTH(or SMD)resistor. The delays associated with the preinstalled headers are shown on the bottom of the board for quick setup. Additionally， you can select more than one switch to combine the resistors in parallel(up to 26 options not including the custom resistor)， check out the hookup guide for a nice chart as to the total resistance and corresponding delay for each combination.。The Nano Power Timer can handle voltages between 1.8V and 5.5V as well as current up to 1.1A with times from 100ms to two hours(preconfigured settings range from 30s to 2h). You will find a button on the board which will allow you a quick override to the delay so you can turn your project on whenever you like.。Get Started with the SparkFun Nano Power Switch。Features。Supply Voltage：1.8V to 5.5V。Current consumption at 2.5V：35nA Typical(50nA Max)。Selectable Time intervals：100ms to 7200s(2 hours)。Timer Accuracy：1%

Description。Cherry MX switches are great for building your own keyboards. Whether you are looking to build a full sized 108-key keyboard， your own 10-key， or just a custom input for your computer Cherry MX switches give you that satisfying keyboard cli

We use these little buttons on everything! These Miniature Single Pole Single Throw switches have a good click to them and are breadboard friendly. Perfect as a tactile reset switch. These buttons are rated up to 50mA.

Description。You'll have no need for a screwdriver with this terminal! This is a 4-pin Latch Terminal with 5mm pitch pins. Each pin is rated up to 250V @ 11A and will line up well with the standard 0.19" spacing. Please note that the pins are thick enough(1.20mm OD)that you may need to increase the hole diameter on some boards. Each of the terminals can accept 18-22AWG wire.。Features。Latch Terminal。5mm Pitch。4-Pin。Tin Plated Brass Terminals。18-22AWG Wire Range。Operation Temperature：-55℃～+100℃

Description。You'll have no need for a screwdriver with this terminal! This is a 3-pin Latch Terminal with 5mm pitch pins. Each pin is rated up to 250V @ 11A and will line up well with the standard 0.19" spacing. Please note that the pins are thick enough(1.20mm OD)that you may need to increase the hole diameter on some boards. Each of the terminals can accept 18-22AWG wire.。Features。Latch Terminal。5mm Pitch。3-Pin。Tin Plated Brass Terminals。18-22AWG Wire Range。Operation Temperature：-55℃～+100℃

Description。You'll have no need for a screwdriver with this terminal! This is a 2-pin Latch Terminal with 5mm pitch pins. Each pin is rated up to 250V @ 11A and will line up well with the standard 0.19" spacing. Please note that the pins are thick en

Description。The SparkFun ProDriver makes it easy to start developing with the TC78H670FTG bipolar stepper motor driver from Toshiba! Latch terminals provide instant solder-less connections to every feature offered. Use our extensive Arduino Library w

。Description。This is the SparkFun RJ11 Breakout， two simple breakout boards for the common 6-pin RJ11 connector. These little boards can easily have one of our RJ11 6-Pin Connectors to work with common telephone cables. Each board features standard B/R/Y/G(Black/Red/Yellow/Green)labels on the top of the board to match a standard telephone wire. Additionally， each board has pin numbers on the back side that match with the pins on the connector.。Each breakout consists of two boards -- one for each end of the connections -- as well as mounting holes to help you secure your project in place.

Description。Standard 'Watch' or Real-Time-Clock crystal. 32.768kHz means it is precisely half of a 16-bit counter. Start counting at 0x8000(or 32768). When the counter rolls over from 65535 to 0， then you know that exactly one second has passed. Reset the interrupt， reset the counter， and start counting again! Rated at 12.5pF load capacitance， 35K ohm max(18K ohm typical)series resistance， and +/- 20ppm stability. Small cylinder package.

Description。This Low Profile Vise provides you with a compact workholding accessory for the Nomad 883 Pro. Each one of these vises are made from scratch， in-house at Carbide 3D， and includes everything you need to attach it to your Nomad. With the Low Profile Vise you will be able to create miniature and small silhouette milling projects.。The Low Profile Vise has a maximum clamping width of 6.5in(～165mm)and is only 8in(～203mm)long and 2in(～50mm)wide. It should go without saying that this vise will easily provide you the ability to mill and fabricate more unique objects!

Description。The gator：log is the perfect data logging tool for your next experiment. With the automation of the data collection process， gone are the days of rushing around with a pen and composition notebook to simultaneously record data and your observations. Now， you only need to sit back and observe your experiment.。The gator：log allows a student(s)to focus more on what is happening in the experiment than watching a thermometer or sensor readout. Additionally， a micro：bit can still be used to provide a graphical display for observing changes in data， when a sensor readout is required. If tied in conjunction with the gator：RTC， stop watches on time based experiments can become a thing of the past too(with the added benefit of more accurate timing results)!。The micro：bit is a pocket-sized computer that lets you get creative with digital technology. Between the micro：bit and our shield-like bit boards you can do almost anything while coding， customizing and controlling your micro：bit from almost anywhere! You can use your micro：bit for all sorts of unique creations， from robots to musical instruments and more. At half the size of a credit card， this versatile board has vast potential!。Get Started with the SparkFun gator：log Hookup Guide。Features。ATmega328P microcontroller。μSD(micro SD)card slot for μSD card for data storage。Two status indicator LEDs。Serial connection via RX and TX pads。GND and 3V3 pads for 3.3V power connection

。Description。When you're working with e-textiles， you have a tendency to collect a lot of small parts：LilyPad boards， bobbins， needles...the tools of the trade. Why not pick up a sturdy box to keep your bits and pieces off the floor? This large LilyPad-branded box is made from rigid cardboard printed with a fancy tone-on-tone pattern， label space and the LilyPad logo. There are even magnetic closures embedded in the lid.。We like this box because it's rigid enough to throw in a sewing bag and also looks good on a workbench or makerspace. With an inside dimension of 2 inches deep， it's big enough for batteries， fabric swatches and whatever small parts you have floating around. It also makes a great gift box if you're thinking about getting someone the gift of LilyPad!。Features。Dimensions：10.0"×6.3"×2.3"

。Description。This is SparkFun Beefy 3 FTDI Basic Breakout for the FTDI FT231X USB to serial IC. The pinout of this board matches the FTDI cable to work with official Arduino and cloned 3.3V Arduino boards. It can also be used for general serial applications. Built upon the same foundation as our 3.3V SparkFun FTDI Basic Breakout， the Beefy 3 is equipped with an AP2112K voltage regulator making this FTDI basic breakout board capable of handling a current load of up to 600 mA! With the addition of a more "Beefy" voltage regulator your will now be able to power a 3.3V project directly from the FTDI. The pinout of this board matches the FTDI cable to work with official Arduino and cloned 3.3V Arduino boards.。This board brings out the DTR pin as opposed to the RTS pin of the FTDI cable. The DTR pin allows an Arduino target to auto-reset when a new Sketch is downloaded. This is a really nice feature to have and allows a sketch to be downloaded without having to hit the reset button. This board will auto reset any Arduino board that has the reset pin brought out to a 6-pin connector. The pins labeled BLK and GRN correspond to the colored wires on the FTDI cable. The black wire on the FTDI cable is GND， green is DTR. Use these BLK and GRN pins to align the FTDI basic board with your Arduino target.。There are pros and cons to the FTDI Cable vs the FTDI Basic. This board has TX and RX LEDs that allow you to actually see serial traffic on the LEDs to verify if the board is working， however this board now requires a Micro-B USB cable. The FTDI Cable is well protected against the elements， but is large and cannot be embedded into a project as easily. The FTDI Basic uses DTR to cause a hardware reset where the FTDI cable uses the RTS signal.。This board was designed to decrease the cost of Arduino development and increase ease of use(the auto-reset feature rocks!). Our Arduino Pro and LilyPad boards use this type of connector.

Description。The SparkFun 3.3V FTDI Starter Kit gives you just what you need to get started with FTDI FT232RL USB to serial IC. The pinout of the included board matches the FTDI cable standard to work with official Arduino and cloned 3.3V Arduino boards. It can also be used for general serial applications. The major difference with this board is that it brings out the DTR pin as opposed to the RTS pin of the FTDI cable. The DTR pin allows an Arduino target to auto-reset when a new Sketch is downloaded. This is a really nice feature to have and allows a sketch to be downloaded without having to hit the reset button. This board will auto reset any Arduino board that has the reset pin brought out to a 6-pin connector.。The SparkFun FTDI Basic Breakout was designed to decrease the cost of Arduino development and increase ease of use(the auto-reset feature rocks!). Our Arduino Pro and LilyPad boards use this type of connector.。The included cable is a USB 2.0 type B to Mini-B 5-pin black cable.

Description。Cherry MX Keyswitches are top-of-the-line mechanical keyboard switches. They're satisfyingly "clicky"， reliable up to tens-of-millions of key presses， and a standard in gaming and programming keyboards across the globe. With the SparkFun Cherry MX Switch Breakout we have made the switches more easily adaptable to breadboard or perfboard-based projects. The Cherry MX Switch Breakout is a perfect prototyping tool for projects ranging from a single-key user-input to fully-custom 101-key keyboards.。In addition to breaking out the switch contacts to breadboard-compatible headers， the Cherry MX Switch Breakout also provides access to an optional switch-mounted LED. Plus， the pin break-outs are designed with keyboard matrix-ing in mind， so you can interconnect as many boards as you'd like into a row-column configuration， keeping the I/O-pin requirements as low as possible.。Note：If you are looking for a Cherry MX Switch to use with this breakout， we've got you covered! CLICK HERE!。Get Started with the Cherry MX Switch Guide。Features。Support for 3mm LED。Footprint for LED current-limiting resistor。Footprint for switch-isolating diode。Chain-able in row/column matrices。Designed to match standard key spacing and keyboard row offsets

Description。Introducing the SparkFun FT231X Breakout board， complete with the full UART hardware handshake feature! The pin-out of this board matches the FTDI cable to work with official Arduino and cloned Arduino boards. It can also be used for general serial applications.。This board still brings out the DTR pin as opposed to the RTS pin of the FTDI cable. The DTR pin allows an Arduino target to auto-reset when a new Sketch is downloaded. This is a really nice feature to have and allows a sketch to be downloaded without having to hit the reset button. This board will auto-reset any Arduino board that has the reset pin brought out to a 6-pin connector.。The coolest thing about the FT231X Breakout is that we have broken out ALL the pins for your use， making this board all the more hackable! It also uses a common microUSB jack.。One of the features of this board is a jumper on the back， which allows the VCC output to be configured to either 3.3V or 5V. This board ships default to 5V， but you can cut the default trace and add a solder jumper if you need to switch to 3.3V. It should be noted that the max input of the FT231X is only 3.3V， but it can operate down to 1.8V with external pull-ups and is also 5V tolerant.

Description。The ANN-MB-00 GNSS multiband antenna is extremely unique from other GNSS/GPS antennas in that it is designed to receive both the classic L1 GPS band and the newly launched(started in 2005)L2 GPS band. Additionally， the ANN-MB-00 from u-blox is extremely well built with both a magnetic base with mounting holes for additional anchoring for the harshest environments.。Designed for the latest u-blox F9 platform--including the ZED-F9P module--it provides a fast， easy， and reliable multi-band antenna solution but can be used with any GPS/GNSS receiver that can benefit from the L1/L2 dual reception.。This antenna supports GPS， GLONASS， Galileo， and BeiDou and includes a high-performance multi-band RHCP dual-feed patch antenna element， a built-in high-gain LNA with SAW pre-filtering， and a 5m SMA cable.。Features。Frequency：L1 Band：1559-1606MHz。L2/L5 Band：1197-1249MHz。Peak gain(over 15cm diameter ground plane)：L1 Band：3.5dBic。L2/L5 Band：0-2.0dBic。VSWR：max. 2。Bandwidth：min. 200MHz。Impedance：50 Ohm。Polarization RHCP。Supports GPS， GLONASS， Galileo， and BeiDou。5m coaxial cable with SMA connector。Magnetic base， fixed installation option(screw mount， 2×M4 screws)。Dimensions：60.0mm×82.0mm×22.5mm。Weight：175g(including cable)

Description。The LilyPad E-Sewing ProtoSnap Kit is a great way to incorporate buttons and switches into an e-textile project without any programming required. Like other LilyPad ProtoSnap series boards， the individual pieces of the included E-Sewing ProtoSnap are pre-wired --- allowing you to try out the function of the circuit before sewing. We have also included a CR2032 battery， needle set， conductive thread bobbin and a swatch of white felt. With all of these parts combined and the featured guide(found in the Documents tab)， you will be able to plan and create fantastic projects straight out of the box!。The E-Sewing ProtoSnap includes three white LilyPad LEDs：two connected to a LilyPad Slide Switch and one connected to a LilyPad Button Board. A LilyPad Coin Cell Battery Holder with the included CR2032 coin cell battery provides all the power you need for the circuit. All you need to do is design how you want your project to be laid out， and then snap everything apart!。Note：A portion of this sale is given back to Dr. Leah Buechley for continued development and education in e-textiles.。Note：Due to the requirements of shipping the battery in this kit， orders may take longer to process and therefore do not qualify for same-day shipping. Additionally， these batteries cannot be shipped via Ground or Economy methods to Alaska or Hawaii. Sorry for any inconvenience this may cause.。Get Started with the LilyPad E-Sewing ProtoSnap Guide

。Description。The SparkFun Qwiic Shield for Teensy provides you with a quick and easy way to enter into SparkFun's Qwiic ecosystem with your Teensy boards. This shield is sized to work with the footprint of Teensy 4.0， Teensy 3.2， and Teensy LC. This shield connects the I2C bus(GND， 3.3V， SDA， and SCL)on your Teensy to four SparkFun Qwiic connectors(two horizontally and two vertically mounted). The Qwiic ecosystem allows for easy daisy chaining so， as long as your devices are on different addresses， you can connect as many Qwiic devices as you'd like.。We have also added a "PROG" button on this shield that is electrically parallel with the "PROG" button on the Teensy Boards so you can choose to enter Programming mode using either the button on your Teensy or the button on the shield.。The Qwiic Shield for Teensy comes with the Teensy Header Kit and you will need to solder the headers to the shield and， if necessary， to your Teensy board. Take care to match the markings on the Qwiic Shield to the appropriate pins on your Teensy to avoid possibly damaging your boards.。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 SparkFun Qwiic Shield for Teensy Hookup Guide。Features。Teensy 4.0， 3.2， or LC Footprint Compatible。4x Qwiic Connection Ports。"PROG" Button w/ satisfying tactile feedback。I2C Jumper。3.3V and GND Buses

。Description。Think of the RedBoard Artemis as just another Arduino... That has BLE. And one megabyte of flash. And runs at less than 1mA. Oh， and it can run TensorFlow models. Ya， that too. The RedBoard Artemis takes the incredibly powerful Artemis module from SparkFun and wraps it up in an easy to use and familiar Uno footprint. We've written an Arduino core from scratch to make programming the Artemis as familiar as。Serial.begin(9600)。. Time-to-first-blink is less than five minutes.。The RedBoard Artemis has the improved power conditioning and USB to serial that we've refined over the years on our RedBoard line of products. A modern USB-C connector makes programming easy. A Qwiic connector makes I2C easy. The RedBoard Artemis is fully compatible with SparkFun's Arduino core and can be programmed easily under the Arduino IDE. We've exposed the JTAG connector for more advanced users who prefer to use the power and speed of professional tools. We've added a digital MEMS microphone for folks wanting to experiment with always-on voice commands with TensorFlow and machine learning. We've even added a convenient jumper to measure current consumption for low power testing.。With 1MB flash and 384k RAM you'll have plenty of room for your sketches. The on-board Artemis module runs at 48MHz with a 96MHz turbo mode available and with Bluetooth to boot!。The SparkFun RedBoard Artemis is a great platform to 'kick the tires' of this amazing module. If you're interesting in testing out the full capabilities of the SparkFun Artemis module or if you're looking for more compact solution， be sure to checkout our ATP and Nano versions of the Artemis line.。Get Started With the SparkFun Artemis RedBoard Guide。Features。Arduino Uno R3 Footprint。1M Flash / 384k RAM。48MHz / 96MHz turbo available。24 GPIO - all interrupt capable。21 PWM channels。Built in BLE radio。10 ADC channels with 14-bit precision。2 UARTs。6 I2C buses。4 SPI buses。PDM Interface。I2S Interface。Qwiic Connector

Description。The micro：bit v2 Educator's Lab Pack includes 10 micro：bit v2 boards and everything you need to get you started with the new learning platform. The Lab Pack has everything you need， including micro：bits， cables， battery packs and a few parts to experiment with. This package provides an easy way to introduce your students to the micro：bit without any difficulty or parts hunting.。SparkFun packages everything educators need to get started with the micro：bit in a variety of classroom settings and learning environments. The hardware boards， cables and extra parts come pre-packaged. Examples and curriculum materials are available from SparkFun and micro：bit， as well as from other educators involved in this growing maker education movement.。Lab Packs are your classroom entry point. By combining our kits， popular boards and other educational tools with support materials(to be updated)， SparkFun brings all the power of the open source community to the classroom. We've also updated the battery pack to be closer to what is in other micro：bit kits. It now requires 2xAAA batteries.。The micro：bit is a pocket-sized computer that lets you get creative with digital technology. Between the micro：bit and our shield-like bit boards you can do almost anything while coding， customizing and controlling your micro：bit from almost anywhere! You can use your micro：bit for all sorts of unique creations， from robots to musical instruments and more. At half the size of a credit card， this versatile board has vast potential!。。Features。Micro：bit 2.0：64 MHz Arm Cortex-M4 with FPU。512KB Flash。128KB RAM。5x5 Red LED Array。Two Programmable Buttons， one touch sensitive logo。MEMS microphone and LED indicator。Onboard Light， Compass， Accelerometer， Temp Sensors and Speaker。2.4 Ghz Micro：bit Radio/BLE 5.0 Smart Antenna。25-pin Edge Connector。4 dedicated GPIO， PWM， i2c， SPI， and ext. power。Three Digital/Analog Input/Output Rings。Two Power Rings --- 3V and GND。Dedcated I2C bus for peripherals。MicroUSB Connector(5V)。JST-PH Battery Connector(。Not。JST-XH)(3V)。Power/reset Button with Status LED。200 mA available for accessories。Program with C++， MakeCode， Python， Scratch

Description。The SparkFun MicroMod Environmental Function Board adds additional sensing options to the MicroMod Processor Boards. This Function Board includes three sensors to monitor air quality(SGP40)， humidity temperature(SHTC3)， and CO2 concentrations(STC31)in your indoor environment. To make it even easier to use， all communication is over the MicroMod's I2C bus!。The SGP40 measures the quality of the air in your room or house. The SGP40 uses a metal oxide(MOx)sensor with a temperature controlled micro hotplate and provides a humidity-compensated volatile organic compound(VOC)based indoor air quality signal. Both the sensing element and VOC Algorithm feature an unmatched robustness against contaminating gases present in real world applications enabling a unique long term stability as well as low drift and device to device variation.。The SHTC3 is a highly accurate digital humidity and temperature sensor. The SHTC3 uses a capacitive humidity sensor with a relative humidity measurement range of 0 to 100% RH and bandgap temperature sensor with a temperature measurement range of -40℃ to 125℃. The SHTC3 builds on the success of their SHTC1 sensor with higher accuracy(±2% RH， ±0.2℃)than its predecessor， enabling greater flexibility.。The STC31 measures CO2 concentrations based on thermal conductivity and has two CO2 measurement ranges：0 to 25 vol%； and 0 to 100 vol%. The measurement repeatability is 0.2 vol%， with a stability of 0.025 vol% / ℃. The measurement accuracy depends on the measurement range：0.5 vol% + 3% measured value； 1 vol% + 3% measured value. Using measurements from the SHTC3， the STC31 is able to provide humidity-compensated measurements together with improved temperature compensation. The STC31 can compensate for atmospheric pressure too - which is handy if， like us， you're up in the mountains!。The outstanding performance of these three sensors is based on Sensirion's patented CMOSens(R)technology， which combines the sensor element， signal processing， and digital calibration on a small CMOS chip. The well-proven CMOS technology is perfectly suited for high-quality mass production and is the ideal choice for demanding and cost-sensitive OEM applications.。Utilizing our handy M.2 MicroMod connector， no soldering is required to connect it to your system. Simply match up the key on your processor and function board's beveled edge connector to their respective key on the M.2 connector， then secure them to the main board with screws. The MicroMod Environmental Function Board can then be read via the I2C port. The board is equipped with the AP2112 3.3V voltage regulator， I2C pull-up resistors， power LED， jumper to disable the LED， and jumpers for alternative STC31 addresses.。Note：A MicroMod Processor and Main Board are not included with this MicroMod Environmental Function Board. These boards will need to be purchased separately.。MicroMod is a modular interface ecosystem that connects a microcontroller "processor board" to various "carrier board" peripherals. Utilizing the M.2 standard， the MicroMod standard is designed to easily swap out processors and function boards on the fly. Pair a specialized carrier board for the project you need with your choice of compatible processor!。Get Started with the MicroMod Environmental Function Board。Features。Input voltage range。2.5V to 6.0V。Typ.。5V。via Main Board's USB connector。Typ.。～3.7V to 4.2V。via Main Board's LiPo battery Connector。I/O voltage。3.3V。AP2112 3.3V voltage regulator(rated 600mA)。Power LED。I2C pull-up resistors。Sensirion SGP40 Air Quality Sensor。Uses I2C interface。Address：0x59(default)。Operating voltage range。1.7V to 3.6V(Typ.。3.3V。)。Operating temperature range。-20℃ to +55℃。Typical current consumption。2.6mA。during continuous operation(at 3.3V)。34μA。when idle(heater off)。Output signal。Digital raw value(SRAW)：0 - 65535 ticks。Digital processed value(VOC Index)：0 - 500 VOC index points。Switch-on behavior。Time until reliably detecting VOC events：<60s。Time until specifications are met：<1h。Recommended sampling interval。VOC Index：1s。SRAW：0.5s - 10s(Typ. 1s)。Sensirion SHTC3 Humidity and Temperature Sensor。Uses I2C interface。Address：0x70(default， non-configurable)。Operating voltage range。1.62V - 3.6V(Typ.。3.3V。)。Operating temperature range。-40℃ to +125 ℃。Relative Humidity。Measurement range：0% to 100%。Typical accuracy：±2 %RH。Resolution：0.01 %RH。Temperature。Measurement range：-40℃ to +125 ℃。Typical accuracy：±0.2 ℃。Resolution：0.01 ℃。Typical current consumption(varies based on mode)。4.9μA to 430μA(Normal Mode)。0.5μA to 270μA(Low Power Mode)。Allows the STC31 to compensate for humidity and temperature。Sensirion STC31 CO2 Sensor。Uses I2C interface。Addresses：0x29(default)。， 0x2A， 0x2B， 0x2C。Operating voltage range。2.7V to 5.5V(Typ.。3.3V。)。Operating temperature range。-20 ℃ to +85 ℃。Calibrated for CO2 in N2 and CO2 in air。Measurement ranges。0 to 25 vol% in N2。0 to 100 vol% in air。Accuracy。0.5 vol% + 3% measured value in N2。1 vol% + 3% measured value in air。Concentration and temperature resolution：16-bit。Repeatability：0.2 vol%。Temperature stability：0.025 vol% / ℃。Start-up time：14 ms。Thermal conductivity sensor provides calibrated gas concentration and temperature output。Jumpers。PWR LED。I2C pull-up resistors。STC31 address selection。Note：The I2C addresses that are reserved for each sensor is 0x59(SGP40)， 0x70(SHTC3)， 0x29(STC31). A multiplexer/Mux is required to communicate to multiple SHTC3 sensors on a single bus. The SHTC3 uses the same address as the Qwiic Mux(0x70). For advanced users that are using multiple SHTC3's with the Qwiic Mux， you will need to adjust the Qwiic Mux's default address.

Description。Although small in size， KW4-Z5F roller microswitches are rated for controlling electrical loads ranging from logic level(computer based circuits)to power duty switching(up to 16.1 A and 250 Vac). The package size of the subminiature switch

Description。This little round on/off/on toggle switch is rated up to 10A at 125VAC and can be panel mounted in a 20mm diameter hole. It'll also look pretty slick in your project!

Description。Cherry MX switches are great for building your own keyboards. Whether you are looking to build a full sized 108-key keyboard， your own 10-key， or just a custom input for your computer Cherry MX switches give you that satisfying keyboard cli

Description。Cherry MX switches are great for building your own keyboards. Whether you are looking to build a full sized 108-key keyboard， your own 10-key， or just a custom input for your computer Cherry MX switches give you that satisfying keyboard cl

Description。These are simple 6-position screw terminals with 2.54mm pitch pins. Rated up to 150V @ 6A， this terminal can accept 30 to 18AWG wire. The 2.54mm pitch will line up with standard 0.1" perf boards.

Description。The SparkFun MicroMod Data Logging Board offers a highly customizable， low-power data logging platform using the MicroMod system allowing you to choose your own Processor to pair with the Carrier Board. The Data Logging Carrier Board breaks out connections for I2C via a Qwiic connector or standard 0.1"-spaced PTH pins along with SPI and serial UART connections for logging data from peripheral devices using those communication protocols.。The Data Logging Carrier Board allows you to control power to both the Qwiic connector on the board and a dedicated 3.3V power rail for non-Qwiic peripherals so you can pick and choose when to power the peripherals you are monitoring the data from. It also features a charging circuit for single-cell Lithium-ion batteries along with a separate RTC battery-backup circuit to maintain power to a real-time clock circuit on your Processor Board.。MicroMod is a modular interface ecosystem that connects a microcontroller "processor board" to various "carrier board" peripherals. Utilizing the M.2 standard， the MicroMod standard is designed to easily swap out processors on the fly. Pair a specialized carrier board for the project you need with your choice of compatible processor!。Get Started with the MicroMod Data Logging Carrier Board Guide。Features。M.2 MicroMod Connector。microSD socket。USB-C Connector。3.3V 1A Voltage Regulator。Qwiic Connector。Boot/Reset Buttons。RTC Backup Battery Charge Circuit。Independent 3.3V regulators for Qwiic bus and peripheral add-ons。Controlled by digital pins on Processor Board to enable low power sleep modes。Phillips #0 M2.5x3mm screw included

Description。This is the 2N5192G， an NPN silicon transistor. This little transistor can help in your project by being used to help drive large loads or amplifying or switching applications. The 2N5192G is specifically rated at 60V and 4A max.

Description。These are the sturdy little stomp switches that you find on guitar effects pedals. They're 3PDT(three-pole， double-throw)type switches. These switches allow you to modify your effects for true bypass and lets you wire a status indicator LED. This is useful for stage performers， as it leaves no question if the "box" is on or off.。These are the same Stomp Switches found in our Proto Pedal Kit. Use these as replacements in some types of effects pedals or， better yet， build your own!

。These are high quality Single Pole - Double Throw(SPDT)sealed relays. Use them to switch high voltage、and/or high current devices.。This relay's coil is rated up to 12V、with a minimum switching voltage of 5V. The contacts are rated up to 5A(@250VAC、30VDC).。Note。In the Datasheet below there is a pin layout listed as "Bottom View." Be aware、this pin layout is actually the top-down view NOT bottom-up.