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Description。This diode-transistor photocouplers consist of an LED， optically coupled to a high speed photodetector to transmit electrical signals between circuits while still isolating your system from higher voltages. The 6N137 optoisolator is presented in an 8-pin DIP package.。The output features is an open collector and coupler parameters are guaranteed over the temperature range from -40℃～5℃. The internal shield provides a guaranteed Common Mode Transient Immunity(typical)10KV/μs.。Features。High Speed：10MBd。Common Mode Rejection：10KV/μs

。Description。Copper tape has countless applications in electronics from creating low-profile traces for electrical components to RF-shielding and antenna-making. Copper tape is even used to join things together using solder， like the stained glass on Tiffany lamps.。This copper tape is backed by a conductive adhesive， is a whopping 2" wide， and comes in rolls of 50 feet. That's a lot of copper.

。Description。Passive Infrared(PIR)sensors are great for detecting motion in a small area around the sensor. The 170μA SparkFun EKMC4607112K PIR Breakout is a simple board equipped with an EKM-series PIR sensor from Panasonic(R). The EKM-series PIR sensors are optimized for small movements to offer motion-sensing options for continuously powered applications.。PIR sensors do not return specific distance data but instead monitor for IR light coming from objects in their field of view and will activate their signal when motion is detected in their sensing area， making them perfect for applications such as turning devices on automatically when motion is detected. Applications include home and building automation for energy saving， automated on/off lighting control， security， appliances， and IoT.。Panasonic's low-profile PIR motion sensors(10.9mm versus standard 14.4mm height offer space savings for constrained designs)consist of a lens to create various detection zones， an optical filter to block non-infrared light， pyroelectric sensing elements， electromagnetic shielding to all circuitry， and an impedance converter to get an electrical signal. This PIR sensor offers digital output across 32 zones at 5m detection distance with 90°×90° detection area.。Note：The sensitivity of passive infrared sensors is influenced by environmental conditions， so a performance evaluation test under representative conditions is recommended.。Get Started with the SparkFun PIR Breakout Guide。Features。Operating Voltage：2.3。-。4.0V。170 μA。standby current consumption。Lens diameter - 10.4mm。Lens Height - 10.9mm。5m detection distance。90°×90°(±45°)detection area

Description。This tri-band GNSS antenna is ideal for GPS L1， GLONASS L1， and Beidou B2 reception. At 45x45mm it is a。large。ceramic antenna with an incredible 38dB LNA gain.。This antenna works well with the GPS-RTK providing reception of Beidou satellites where other more basic GPS antennas cannot. We've chosen to have the antenna manufactured without an enclosure to decrease the weight(45g including cable)making this antenna more ideal for rover and quad-copter applications. Additionally， the cable length has been reduced to 1m to reduce weight and to make a more clean installation.。We recommend this antenna for RTK use when combined with the ground plate. This antenna is ideal for advanced raw， RTK， and post-processed measurements of GPS， GLONASS， and Beidou constellations. If all you need is GPS and GLONASS(basic GNSS)consider our lower cost magnetic mount GNSS antenna.。Antenna is terminated with a standard SMA connector. Check out the related items below for any conversion cables you may need.。Features。Dimensions：45x45x9mm。Weight：45g including 1m cable。Frequency Range：1558 - 1615MHz。LNA Voltage：3.3 to 15VDC。Primary Antenna Gain：4dB。LNA Gain：38dB。LNA Current：<= 35mA。Termination Connector：SMA。Impedance：50Ω。Right hand polarization。Cable Length：1 meter

。Description。This will be a treat for your ears! The Hamburger Mini Speaker is a 3W economical speaker option for any project needing stand-alone sound. The Hamburger features a built-in lithium polymer battery for portable application， a 3.5mm stereo jack(sorry， iPhone 7 users)and two volume options(quiet and loud)to control how loud your sound needs to be. This speaker really can't be compared to a good pair of JBLs， but for the price point the Hamburger won't break the bank for your next audiophile project!。Why call it the Hamburger? When you twist the top and bottom halves of the speaker in opposite directions， it expands out like an accordion extending the bass reflex portion. Each Hamburger Mini Speaker comes with a 1.5ft mini USB cable for recharging capabilities.。We use this amplified speaker quite frequently with our Spectacle Audio Board and Sound Kit， but that doesn't mean you can't find a different use for it!。Features。Speaker：3W(1KHz， THD10%)36mm。Frequency Response：20Hz～20KHz。S/N ratio：≧85dBA。Built-in 3.7V 180mA LiPo battery。～1--2 hour play time。52mm x 38mm

Description。If you are not needing a lot of power to start your FPGA adventure， or are looking for a more economical option， the Alchitry Cu FPGA Development Board might be the perfect option for you! The Alchitry Cu is a "lighter" FPGA version than the Alchitry Au but still offers something completely unique. FPGAs， or Field-Programmable Gate Arrays， are an advanced development board type for engineers and hobbyists alike to experience the next step in programming with electronics. The Cu truly exemplifies the trend of more affordable and increasingly powerful FPGA boards arriving each year. This board is a fantastic starting point into the world of FPGAs and the heart of your next project. Finally， now that this board is built by SparkFun， we added a Qwiic connector for easy I2C integration!。The Alchitry Cu uses the Lattice iCE40 HX FPGA with 7680 logic cells and is supported by the open source tool chain Project IceStorm. The Cu possesses 79 IO pins with eight general purpose LEDs； a 100MHz on-board clock that can be manipulated internally by the FPGA； a USB-C connector to configure and power the board； and a USB to serial interface for data transfer.。By adding stackable expansion boards similar to shields or HATs called "Elements，" the Alchitry Cu is able to expand its own hardware capabilities by adding prototyping spaces， buttons， LEDs， and more!。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 our Learning FPGA Tutorials。Features。Lattice iCE40-HX8K FPGA - 7680 logic elements。79 IO pins(3.3V logic level)。USB-C to configure and power the board。Eight general purpose LEDs。One button(typically used as a reset)。100MHz on-board clock(can be multiplied internally by the FPGA)。Powered with 5V through USB-C port， 0.1" holes， or headers。USB to serial interface for data transfer(up to 12Mbaud)。Qwiic Connector。Dimensions of 65mm×45mm。。Examples。First FPGA Project - Getting Fancy with PWM。External IO and Metastability

Description。The TFMini Plus is a ToF(Time of Flight)LiDAR sensor capable of measuring the distance to an object as close as 10 centimeters(+/- 5cm up to 6m)and as far as 12 meters(+/-1% starting at 6m)! As with all LiDAR sensors， your effective detection distance will vary depending on lighting conditions and the reflectivity of your target object， but what makes this sensor special is its size. Measuring only 35x18.5x21mm， the TFMini Plus allows you to integrate LiDAR into applications traditionally reserved for smaller sensors.。Setting itself apart from the original TFmini， the TFmini Plus has been designed with an IP65 enclosure meaning its "Dust tight water resistant"， and also passed the vibration test of drone level， which will greatly expand its application range. The TFMini Plus is easy to power at only 5V and easy to talk to using the UART communication protocol.。Important：This product does not use laser light for ranging. Instead it contains an LED and optics. Many such systems are being marketed under the name "LiDAR，" although it may be more appropriate to think of this device as a "Time-of-Flight Infrared Rangefinder". It differs significantly from traditional IR rangefinders in that it uses ToF to determine range and not triangulation ― as is performed by the Sharp GP-series devices.。Features。Operating Range - 0.1m～12m1。Accuracy - ±5cm@(0.1-6m)， ±1%@(6m-12m)。Distance resolution - 5mm。Frame rate - 1-1000Hz(adjustable)。Ambient light immunity - 70klux。Operating temperature - -20℃～60℃。Enclosure rating - IP65。Light source - LED。Central wavelength - 850nm。FOV - 3.6°。Supply voltage - 5V±0.5V。Average current - ≦110mA。Power consumption - 550mW。Peak current - 500mA。Communication level - LVTTL(3.3V)。Material of enclosure - ABS+PC。Storage temperature - -20℃～75℃。Weight - 11g。Wire length - 30cm

Description。The TFMini-S Micro LiDAR Module is a ToF(Time of Flight)LiDAR sensor capable of measuring the distance to an object as close as 10 centimeters(+/- 6cm up to 6m)and as far as 12 meters(+/-1% starting at 6m)! As with all LiDAR sensors， your effective detection distance will vary depending on lighting conditions and the reflectivity of your target object， but what makes this sensor special is its size. Measuring only 42x15x16mm， the TFMini-S allows you to integrate LiDAR into applications traditionally reserved for smaller sensors.。TFMini-S is a single-point ranging LiDAR based on TFmini upgrade. The blind zone is shortened to 10cm， the outdoor performance and accuracy of different reflectivity are improved， it can achieve stable， accuracy， sensitive and high frequency range detection.。Important：This product does not use laser light for ranging. Instead it contains an LED and optics. Many such systems are being marketed under the name "LiDAR，" although it may be more appropriate to think of this device as a "Time-of-Flight Infrared Rangefinder". It differs significantly from traditional IR rangefinders in that it uses ToF to determine range and not triangulation ― as is performed by the Sharp GP-series devices.。Features。Operating Range：0.1m～12m@90%Reflectivity。0.1～7m@10% Reflectivity。0.1m～12m@90%Reflectivity(70Klux)。0.1～7m@10% Reflectivity(70Klux)。Accuracy：±6cm@(0.1-6m)。±1%@(6m-12m)。Distance Resolution：1cm。Frame Rate：100Hz。Ambient light immunity：70Klux。Operating Temperature：0℃～60℃。Light source：VCSEL。Central wavelength：850nm。Photobiological safety：Class1(EN60825)。FOV：2°2。Supply voltage：5V±0.1V。Average current：≦140mA。Power consumption：≦0.7W。Peak current：200mA。Communication level：LVTTL(3.3V)。Communication interface：UART / I2C。Dimension：42mmx15mmx16mm(LxWxH)。Housing：PC/ABS。Storage temperature：-20℃～75℃。Weight：5g±0.3g。Cable length：10cm

。Description。Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer(e.g. Flash， Processing， MaxMSP). The open-source IDE can be downloaded for free(currently for Mac OS X， Windows， and Linux).。The Arduino Mega is a microcontroller board based on the ATmega2560. It has 54 digital input/output pins(of which 14 can be used as PWM outputs)， 16 analog inputs， 4 UARTs(hardware serial ports)， a 16 MHz crystal oscillator， a USB connection， a power jack， an ICSP header， and a reset button. It contains everything needed to support the microcontroller； simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.。Never fear for accidental electrical discharge， either since since the Mega also includes a plastic base plate to protect it!。The Mega 2560 R3 also adds SDA and SCL pins next to the AREF.。In addition， there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board.。The other is a not connected and is reserved for future purposes.。The Mega 2560 R3 works with all existing shields but can adapt to new shields which use these additional pins.。Not sure which Arduino or Arduino-compatible board is right for you? Check out our Arduino Buying Guide!。Features。ATmega2560 microcontroller。Input voltage - 7-12V。54 Digital I/O Pins(14 PWM outputs)。16 Analog Inputs。256k Flash Memory。16Mhz Clock Speed

Description。The SparkFun RTK Surveyor is an easy to use GNSS receiver for centimeter-level positioning. Perfect for surveying， this preprogrammed device can also be used for autonomous driving， navigation， asset tracking and any other application where there is a clear view of the sky. The RTK Surveyor can also be used as a base station. With the flick of a switch， two RTK Surveyors can be used to create an RTK system capable of 14mm horizontal positional accuracy. The built-in Bluetooth(R)connection via an ESP32 WROOM enables the user to use the RTK Surveyor with their choice of GIS application on a phone or tablet. The built in battery allows field use for up to four hours and is compatible with common USB battery banks.。This device can be used in four modes：GNSS Positioning(～30cm accuracy)。GNSS Positioning with RTK(1.4cm accuracy)。GNSS Base Station。GNSS Base Station NTRIP Server。In Position mode the device receives L1/L2 signals from a user-provided antenna and the high-grade GNSS receiver provides lat/long and altitude with accuracies around 300mm.。In Positioning with RTK mode the device receives L1/L2 signals from the antenna and correction data from a base station. The correction data can be obtained from a cellular link to online correction sources or over a radio link to a 2nd RTK Surveyor setup as a base station.。In Base Station mode the device is mounted to a temporary position(like a tripod)and begins transmitting correction data over a radio or internet connection. A base is often used in conjunction with a second unit set to 'Positioning with RTK' to obtain the 14mm relative accuracy.。In Base Station NTRIP Server mode the device is mounted to a semi or permanently fixed position(like a roof)and connects over WiFi to transmit the correction data to a NTRIP caster so that any rover can access the correction data over a cellular or internet connection. This type of base is a very easy way to setup a very precise absolute correction source.。Two cables are provided with the RTK Surveyor allowing a user to plug on our easy to use Serial Telemetry Radios or their own radio link. If a local correction source is within 10km， a user can also use their phone to provide correction data over the Bluetooth(R)link(no external radio needed!).。Note：The SparkFun RTK Surveyor is just the enclosed device and does NOT include an antenna， serial telemetry radio， or associated mounting pieces. These items will need to be purchased separately from the Hookup Accessories below.。Get Started With the SparkFun RTK Surveyor Guide。Features。GNSS Receiver：ZED-F9P。Concurrent reception of GPS， GLONASS， Galileo and BeiDou。Receives both L1C/A and L2C bands。Current：68mA - 130mA(varies with constellations and tracking state)。Time to First Fix：25s(cold)， 2s(hot)。Max Navigation Rate：PVT(basic location over UBX binary protocol)- 25Hz。RTK - 20Hz。Raw - 25Hz。Horizontal Position Accuracy：2.5m without RTK。0.010m with RTK。Max Altitude：50km(31 miles)。Max Velocity：500m/s(1118mph)。Bluetooth(R)Transceiver：ESP32 WROOM。Xtensa(R)dual-core 32-bit LX6 microprocessor。Up to 240MHz clock frequency。16MB of flash storage。520kB internal SRAM。Integrated 802.11 BGN WiFi transceiver。Integrated dual-mode Bluetooth(R)(classic and BLE)。Hardware accelerated encryption(AES， SHA2， ECC， RSA-4096)。2.5 μA deep sleep current。Overall Device。Internal Battery：LiPo 1000mAh with 500mA charging。Radio Port：3.3V TTL Serial(57600bps RTCM TX/RX)。Data Port：3.3V TTL Serial(115200bps NMEA)。Weight：132g(entire device including battery)。Dimensions：118mm×79mm×30mm(4.7in×3.1in×1.2in)。1x Qwiic Connector。1x microSD Socket for optional logging。Changes：This version(which replaces SPX-17369)uses a reinforced edge mount SMA connector for better resiliency when a fixed 'stub' antenna is used.

Description。The SparkFun weather：bit is a fully loaded "carrier" board for the micro：bit that， when combined with the micro：bit， provides you with a fully functional weather station. With the weather：bit you will have access to barometric pressure， relative humidity and temperature readings. There are also connections on this carrier board to optional sensors such as wind speed， direction， rain gauge and soil readings! In this version we have also added a vertical Qwiic connector. The micro：bit has a lot of features and a lot of potential for weather data collection.。The weather：bit connects to the micro：bit via an edge connector at the top of the board， making setup easy. This creates a handy way to swap out micro：bits for programming， while still providing reliable connections to all of the different pins on the micro：bit. We have also included serial and I2C headers on the weather：bit for optimized connectivity if you so choose.。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!。Note：The SparkFun weather：bit does。NOT。include a micro：bit board. The micro：bit will need to be purchased separately.。Get started with the weather：bit Guide。Features。Onboard temperature， humidity， and pressure sensor。Connectors(PTH and screw terminal)for soil moisture and soil temperature。Connectors(RJ11)for wind speed， direction and rainfall gauges。Edge connector for easy micro：bit integration。Vertical Qwiic connector。Headers for Serial and I2C communication