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Description。This is a 220 Ohm， 1/4th Watt， +/- 5% tolerance PTH resistor. Commonly used in breadboards and perf boards. We've opted for a new and more breadboard-friendly lead thickness(they're a bit thicker than our last ones).。Note：。Sold as singles.。Features。Tolerance：±5%。Power(Watts)：0.25W， 1/4W。Composition：Carbon Film。Features：Flame Retardant Coating， Safety。Temperature Coefficient：0/ -400ppm/℃。Operating Temperature：-55℃ ～ 155℃。Package / Case：Axial。Size / Dimension：0.091"" Dia x 0.236"" L(2.30mm x 6.00mm)。Number of Terminations：2。Resistance：220 Ohms

Description。An adjustable potentiometer can open up many interesting user interfaces. With this rotary potentiometer just turn the dial and the resistance changes. This potentiometer from Bourns has a 1/4" metal knurled shaft diameter， PC pin terminal

Description。An adjustable potentiometer can open up many interesting user interfaces. With this rotary potentiometer just turn the dial and the resistance changes. This potentiometer from Bourns has a 1/4" metal knurled shaft diameter， solder lug terminals， no detents， and has a 100K linear taper.。Connect VCC to an outer pin， GND to the other， and the center pin will have a voltage that varies from 0 to VCC depending on the rotation of the pot. Hook the center pin to an ADC on a microcontroller and get a variable input from the user!

Description。These are your run-of-the-mill 1/4 Watt， +/- 5% tolerance PTH resistors. Commonly used in breadboards and other prototyping applications， these 330 ohm resistors make excellent LED current limiters and are great for general use. These thi

Description。These are your run-of-the-mill 1/4 Watt， +/- 5% tolerance PTH resistors. Commonly used in breadboards and other prototyping applications， these 100 ohm resistors make excellent pull-ups， pull-downs and current limiters. These thick-lead v

。Description。These are your run-of-the-mill 1/4 Watt， +/- 5% tolerance PTH resistors. Commonly used in breadboards and other prototyping applications， these 10K ohm resistors make excellent pull-ups， pull-downs and current limiters. These thick-lead versions of the resistors fit snugly into a breadboard with very little movement， so you should have few to no issues using them in your next project!。These resistors come in bags of 20. They are the same resistors found in the SparkFun Inventor's Kit v4.0， upgraded from the resistors in previous versions of the kit.

Description。These are your run-of-the-mill 1/4 Watt， +/- 5% tolerance PTH resistors. Commonly used in breadboards and other prototyping applications， these 1M ohm resistors make excellent pull-ups， pull-downs and current limiters. These thick-lead vers

。Description。These are your run-of-the-mill 1/4 Watt， +/- 5% tolerance PTH resistors. Commonly used in breadboards and other prototyping applications， these 1K ohm resistors make excellent pull-ups， pull-downs and current limiters. These thick-lead versions of the resistors fit snugly into a breadboard with very little movement， so you should have few to no issues using them in your next project!。These resistors come in bags of 20.

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。If you want to get some sound out of your project but have a tight space budget， this is a good way to do it. This 0.5W， 8Ohm speaker is only 40mm in diameter and just over 4mm thick， the same kind you might find in one of those "talking g

Description。This cute little coax is a champ in our RF kit! It has a right angle female U.FL(aka I-PEX)connector on both ends. Now instead of jerry-rigging a few U.FL to SMA cables together we can go straight from one U.FL device to another. As an added bonus this coax is the nice stuff - approximately 1mm in diameter and extra flexible. The 50-ohm impedance of this cable makes it well suited for almost all SparkFun RF products including GPS， LoRa， and RFID.。Features。200 mm length。1.25 mm diameter。U.FL connectors on both ends(cable side， to mate with SMD board connector)

Description。The SparkFun ProtoShield Kit lets you customize your own Arduino shield using whatever circuit you can come up with and then test it to make sure everything is working the way it should! The SparkFun ProtoShield Kit is based off the Arduino R3's footprint that allows you to easily incorporate it with favorite Arduino-based device.。One of our favorite features with this version of the ProtoShield Kit is the solderable-like breadboard prototyping area! Half of this area was designed with a breadboard in mind. On the underside of the shield you will be able to see open jumper pads between each through hole to make a connection like a breadboard. Once you add a component， simply add a solder jumper between holes to make a connection. For those that prefer the standard prototyping pads， we left the other side(near the BlueSMiRF and Serial UART ports)as is.。We have also moved the prototype testing components(those used to make sure your circuit works effectively)off of the "mainland" of the shield and onto a ProtoSnap styled， removable PCB. On this test area you will find soldering areas for the two yellow 3mm LEDs(as well as pins to control and power them)， two 330 Ohm resistors， a 10K Ohm resistor， and a pushbutton.。Note：。Since this product is a kit， assembly and a basic knowledge of soldering will be required. The SparkFun ProtoShield Kit does not come pre-assembled.。Get Started With the SparkFun ProtoShield Kit Guide。Features。Arduino R3 Footprint。Soldering Kit。Solderable-Like Breadboard。BlueSMiRF or Comparable 6-pin Pins。Detachable Test Area

Description。This is the Antenna Kit for the Raspberry Pi 4 Compute Module wireless variants. The "duck" style antenna adds range to the wireless radio on the wireless enabled Compute Modules. Something quite desirable if you're working in industrial environments or other places a Compute Module would be used and the potential for signal interference is present. The antenna connects to the board via the press-fit U.FL connector on board the compute module(see photos for more details).。This kit contains an antenna， bulkhead fixture， and SMA to U.FL Cable.。Features。Frequency range：2400-2500/5100-5800 MHz。Bandwidth：100-700MHz。VSWR：≦ 2.0。Gain：2 dBi。Impedance：50 ohm。Polarisation：Vertical。Radiation：Omnidirectional。Maximum power：10W。Antenna dimensions：108 mm×10 mm

Description。The M1600HCT-P-SMA is unique antenna combining the ability to communicate with the Iridium satellite network while simultaneously receiving L1 GNSS signals(GPS and GLONASS). This makes the M1600HCT the perfect antenna for tracking devices that transmit their position over Iridium. In addition， weighing only 11 grams， the antenna can achieve IP67 when seated against an SMA bulkhead connection(there is a small o-ring built into the base).。This product is designed for applications requiring high quality reception of the Iridium network and is ideal when：the orientation of the unit containing the antenna is random， the unit is used in harsh environments， and/or the antenna is mounted externally and in close proximity to other antennas.。Features。Frequency。GPS(1575 MHz)。GLONASS(1602 MHz)。Iridium(1616 - 1626 MHz)。Polarization：RHCP。Peak Gain：GPS：-3 dBic。GLONASS：0 dBic。Iridum：2.8 dBic。Impedance：50 Ohm。RF Connector：SMA。Dimensions：48mm×18.5mm。Weight：11g

Description。One ruler to rule them all. This is a basic 12 inch ruler， but made from a PCB. We have included a lots of useful information on each side of the ruler that you might use on a daily basis including Wire Gauge holes， transistor diagrams， common fractions， Roman numerals， and metric to imperial conversions. Most importantly， the ruler provides you with a straight line and centimeter markings one side and inch markings on the other side.。You'll also find a small protractor in the middle for all your angle measurement needs. While we figured you have a fairly good idea how to use a ruler we do have a tutorial to explain all the information you'll see!。Get Started with the How to use a Ruler Guide。Features。12 inch PCB ruler with markings down to 0.05" or 1/32"。30.48 cm PCB ruler with markings down to 0.1mm。Electrical Equations such as Ohm's Law and Parallel Resistors。Keyboard Alt Codes。Color Wavelengths。Protractor。Metric Prefix Summary Chart。Metric conversions。Morse Code。Transistor Diagrams。Roman Numerals。Fraction Summary。Wire Guage Chart。Tap and Drill Chart。Size：12"x 1.5"

。Description。Add some crisp and compact audio to your project with this Mini External USB 2.0 Speaker. It's USB-only and does not require or use a 3.5mm audio jack. You'll get great audio， even with a device that doesn't have a head phone jack. Since this speaker is powered over USB， there's no need to charge it by other means， merely plug it into your desired device's USB port and listen to the audio flow. Compact and convenient to carry， it's simple and practical. With two built-in speakers and no battery or adapter needed， this plug-and-play speaker is perfect if you need a quick and portable audio solution.。The USB Stereo Speaker works great with a Raspberry Pi， or any other computer. For use with the Pi， check out our guide which will show you how to set it up so it is the default output and then test it.。Features。Voltage：5V。Total power：2 x 2W。SNR：60dB。Impedance：4 ohm。Cable Length：1，168mm / 46"。Product Dimensions：84.0mm x 43.0mm x 32.0mm / 3.3" x 1.7" x 1.3"

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 Molex GNSS Flex antenna is a great option for basic GNSS applications and will work with any of our GNSS boards equipped with a U.FL at a fraction of the cost of many of its big brothers. This antenna supports GPS， Galileo， BeiDou， and GLONASS in three different frequency bands(1561 +/-3MHz， 1575 +/-3MHz， 1602 +/-3MHz).。The Molex Flexible GNSS Antenna has an incredibly small footprint at 40.40mm×15.40mm， while the adhesive pad is a bit bigger at 56.40mm×20mm. Even better， the antenna is only 0.1mm thick(or about the thickness of a piece of paper). Simply remove the backing and stick this to any surface， or leave the backing on(just be careful of the fragile U.FL connector).。Features。Cable length：50mm。Connector：U.FL。Radiation Pattern：Omnidirectional。Polarization：Linear。Weight：0.466 g。Mounting Style：Adhesive。Protocol：BeiDou， Galileo， GLONASS， GPS。Return Loss：< -8dB。Peak Gain(Max)：1.1 dBi+。Efficiency：>74%。Input Impedance 50 Ohms

Description。Keypads are very handy input devices， but who wants to tie up seven GPIO pins， wire up handful of pull-up resistors， and write firmware that wastes valuable processing time scanning the keys for inputs? The SparkFun Qwiic Keypad comes fully assembled and makes the development process for adding 12 button keypad easy. No voltage translation or figuring out which I2C pin is SDA or SCL， just plug and go! Utilizing our handy Qwiic system， no soldering is required to connect it to the rest of your system. However， we still have broken out 0.1"-spaced pins in case you prefer to use breadboard.。Each of the keypad's 12 buttons has been labeled 1， 2， 3， 4， 5， 6， 7， 8， 9， 0， *， and and has been formatted to into the same layout as telephone keypad with each keypress resistance ranging between 10 and 150 Ohms. The Qwiic Keypad reads and stores the last 15 button presses in First-In， First-Out(FIFO)stack， so you don't need to constantly poll the keypad from your microcontroller. This information， then， is accessible through the Qwiic interface. The SparkFun Qwiic Keypad even has software configurable I2C address so you can have multiple I2C devices on the same bus.。NOTE：The I2C address of the Qwiic Keypad is 0x4B and is jumper selectable to 0x4A(software-configurable to any address). multiplexer/Mux is required to communicate to multiple Qwiic Keypad sensors on single bus. If you need to use more than one Qwiic Keypad 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 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 Keypad Hookup Guide。Features。Software Selectable Slave Address。Low Power ATtiny85 controller。Button Presses w/ Time Stamp。Default I2C Address：0x4B。2x Qwiic Connector