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Description。The PQ12 series of micro linear actuators are ideal for applications requiring precise positioning and compact size. Weighing in at just 22 grams， the PQ12 is incredibly light as well as compact. The affordably-priced PQ12 is the most powerful actuator of it's size. This is why it has become a popular choice for OEM manufacturers as well as Arduino and RC hobbyists. Some industries where the PQ12 are in use include：prosthetics， robotics， medical， simulation.。The PQ12-R series of linear servos operate as a direct replacement for standard rotary servos. They use the same standard 3 wire connector， ground power and control. Regardless of how you drive your servos， be it with an RC receiver， an Arduino board， or a VEX micro-controller， the PQ12-R servo will function in place of a regular servo， but with the added benefit of providing linear motion. The PQ12-R is available in a 20mm stroke coupled with gear ratio options of 30：1， 63：1 and 100：1 cover a large variety of applications.。The PQ12-100-6-R has：a 100：1 gear ratio for maximum lifting force； 6VDC operating voltage； and a servo(PWM)interface. This powerful little actuator can lift 50N(～5kg)!。The datasheet doesn't mention a minimum operating voltage， but we've tested this actuator at 5VDC and it seems to work just fine. The maximum force and movement speed are reduced of course.。Features。Gearing Option：100：1。Peak Power Point：40N @ 6mm/s。Peak Efficiency Point：20N @ 8mm/s。Max Speed(no load)：10mm/s。Max Force(lifted)：50N。Max Side Load：10N。Back Drive Force：35N。Stroke：20 mm。Input Voltage：6 VDC。Stall Current：550mA @ 6V。Mass：22g。Operating Temperature -10℃ to +50℃。Positional Repeatability：±0.1mm。Mechanical Backlash：0.25 mm。Audible Noise：55dB @ 45cm。Ingress Protection：IP-54。Maximum Duty Cycle：20%。PWM(Servo)signal：Fully retracted：2.0ms @ 50Hz。Fully extended：1.0ms @ 50Hz

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

。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。This MI：pro Protector Case for the BBC micro：bit has been designed to work with both the original micro：bit V1 and the micro：bit V2. These cases feature a four-layer construction style with ability to mount a 2xAAA battery pack to the back of the case while still providing access to all buttons and ports on the micro：bit. Though these cases do protect the micro：bit astoundingly well， the biggest benefit of using the MI：pro is to not accidentally short out the pads on the back of the micro：bit.。Construction is simple， requiring only a small flathead screwdriver(at most)， and involves layering each plate on top of one another around the micro：bit and screwing it into place. Luckily， the MI：pro Protector case enables easy access to the edge pins at the bottom of the micro：bit， allowing it to still be plugged into an edge connector found on many of our carrier boards. The only board that cannot be used in conjunction with the MI：pro case is the SparkFun gamer：bit due to its edge connector being located in the center of the board.。Note：The MI：pro Protector case only includes the parts found in the Includes Tab. This case does。NOT。include a micro：bit， power source or mounting screws. These items will need to be purchased separately.。Features。Dimensions：Length：65mm.。Width：37mm.。Depth(without screws)：12mm.。Depth(with screws)：18.5mm.。Provides excellent protection to the BBC micro：bit whilst allowing access to the bottom pins.。Full access to the A and B buttons on the BBC micro：bit.。Attach a battery cage to the rear of the case with the supplied sticky fixer.。Full access to pins and connections including the micro USB connector.。Clear case material shows the on-board LEDs in perfect clarity.。The case is compatible with versions 1 and 2 of the micro：bit.。When used in conjunction with a battery holder， micro：bit projects can be fully mobile.