Our giant collection of nearly every Bit provides limitless options for schools and makerspaces. Access STEAM+ Coding Kit content and hours of inventions and creative builds via littleBits classroom 296 Bits Wall storage for easy Bit organization and access 3 craft packs Grades 3+ Engage 32 students NOTE: This kit is an upgrade of the Pro Library. The previous square LED matrix has been replaced by a round matrix. Some images on this page may still contain the square matrix.

The littleBits STEAM+ Class Pack is an all-in-one coding and engineering educational solution designed to inspire and engage students grades 3–8 in STEAM learning. This comprehensive kit includes 10 individualized sets with storage, a comprehensive Invention Guide, and over 40 hours of standards-aligned STEAM curriculum to fuel critical thinking, problem-solving, and teamwork through hands-on activities and projects. In the free Fuse app, students can level up the learning experience by programming littleBits inventions with the codeBit and simulating circuits. STEAM+ Class Pack Key Features ENGAGES UP TO 40 STUDENTS: The littleBits STEAM+ Class Pack is designed to engage up to 40 students, making it an ideal solution for classrooms or other educational settings. OVER 40 HOURS OF CURRICULUM: With more than 40 hours of standards-aligned STEAM lessons and activities, educators can easily integrate the littleBits STEAM+ Class Pack into their existing curriculum. Students practice their programming skills with—a virtual circuit builder and programming platform when used with the included codeBit. INNOVATIVE MODULAR DESIGN: The littleBits STEAM+ Class Pack features a unique, colour-coded modular system that allows students to explore electronics, coding, and engineering concepts in an intuitive, engaging manner.  SUPPORTS COLLABORATION: The Class Pack includes 10 individual kits, each designed to support multiple students, encouraging teamwork, communication, and collaboration as students work together to create innovative solutions to challenges and projects. EASY ORGANISATION AND STORAGE: Built-in storage makes it simple to keep the littleBits components organised and portable, ensuring that students can focus on learning and exploration without the hassle of clutter or lost components. NOTE: The previous square LED matrix has been replaced by a round matrix. Some images on this page may still contain the square matrix. What's in the Pack? Bits 20x button 10x temperature sensor 10x long LED 10x buzzer 10x cross axle servo 10x USB power 20x wire 10x pressure sensor 10x speaker 10x square LED matrix 10x codeBit 10x light sensor 10x power 20x cross axle DC motor 10x pulse 10x fork 10x slide dimmer 10x fan 10x inverter 10x number 10x RGB LED 10x bargraph Accessories 10x Rechargeable batteries 20x powerSnap 10x USB cable, 1.5mm 10x USB cable, 0.5mm Magnet BitShoes Hook and Loop BitShoes Twist Ties 10x 9V batteries + Cable 10x XL mounting boards 10x USB Power Adapter + Cable 20x Wheels 30x Mechanical arms 10x Standard Mounting Boards 10x Durable Storage Carrying Cases 100's other accessories

Engage students in computational thinking by teaching them to code their own games and physical inventions in Google Blockly with a Javascript text view! Complete 100+ engaging activities and 10 lessons using the free Fuse app and littleBits Classroom.  Engage 20-30 Students per Bundle 10 New durable storage containers for easy organisation and clean up. Get hands on with littleBits Code Kit today! Recommended for Grades 3+.  What’s in littleBits Code Kit Class Pack?  USB power x10 Buttons x10 Dimmer x10 Slide Dimmer x10 Pressure Sensor x10 Sound Trigger x10 3 Wires x10 branch x10 code bit x10 bargraph x10 servo (cross axle) x10 speaker x10 round LED matrix x10 Durable Storage x10 servo mount x10 bitShoes, hook & loop x120 mechanical arm, cross axle x10 XL mounting board, x10 USB Plug x10 microUSB Cable x10 powerSnap x30 twist ties x10 NOTE: The previous square LED matrix has been replaced by a round matrix. Some images on this page may still contain the square matrix.

Unleash student creativity with the littleBits STEAM Student Set Class Pack! Developed with educators, this electronics kit is designed to teach STEAM principles and encourage exploration, experimentation, and hands-on learning. With 10 littleBits STEAM Student Sets and 20+ hours of standards-aligned curriculum, the STEAM Student Set Class Pack enables students to practice the engineering design process in an approachable and hands-on way. Each kit serves up to 3 students and is best suited for grades 3-8. STEAM Student Set Key Features COLLABORATIVE LEARNING: Each kit contains 19 Bits and 46 accessories to engage up to 3 students and foster teamwork, communication, and collaboration skills. STANDARDS-ALIGNED: The STEAM Student Set includes 20+ hours of cross-curricular and standards-aligned lessons available on littleBits Classroom, giving educators everything they need to easily implement the kit in their classroom. Students learn fundamental concepts such as circuitry, engineering, physics, art, and design thinking. OPEN & GUIDED CHALLENGES: Find open and guided STEAM challenges on littleBits Classroom, encouraging creative problem-solving skills, self-expression, and reflection. INVENTION GUIDE: The included Invention Guide contains Bit tips and 8 step-by-step challenges to get students started. DURABLE STORAGE: The STEAM Student Set comes with individual durable storage containers for easy organisation and clean up, as well as printed materials for instructional support and classroom implementation. What's in the Bundle Power x10 USB Power x10 Button x10 Slide Dimmer x10 Light Sensor x10 Temperature Sensor x10 Pulse x10 Fork x10 Wires x10 Inverter x10 Number x10 Long LED x10 RGB LED x10 DC Motors x20 Servo & Hub x10 Buzzer x10 Fan x10 Durable Storage x10 Invention Guide Invention Log Teacher's Guide

Invent and code with one, easy to use kit. The littleBits STEAM+ Coding Kit contains 25 Bits, a newly designed durable storage container, printed teacher support materials and 40+ hours of standards-aligned STEAM and Coding curriculum. Compatible with the Fuse app, students can program littleBits inventions and simulate circuits to level up the learning experience. Engage up to 4 students per kit with 25 Bits and 34 accessories Run 40+ hours unplugged, cross-curricular lessons and coding tutorials available on littleBits Classroom littleBits Classroom Unit Plans, including STEAM Inventions, Coding Fundamentals, and Engineering Design, are standards-aligned (Grades 3-8) Compatible with the littleBits Fuse app, students of all coding abilities can program the codeBit through blocks or Java-Script text and level up their inventions Improved durable storage container for easy organization and clean up & printed materials for instructional support and classroom implementation NOTE: The previous square LED matrix has been replaced by a round matrix. Some images on this page may still contain the square matrix. What's in the Pack? Bits 2x buttons 1x temperature sensor 1x long LED 1x buzzer 1x cross axle servo 1x USB power 1x pressure sensor 1x speaker 1x square LED matrix 1x codeBit 1x light sensor 1x power 2x cross axle DC motors 1x pulse 1x fork 1x slide dimmer 1x fan 1x inverter 1x number 1x RGB LED 2x wires 1x bargraph Accessories 1x Rechargeable battery 2x powerSnap 1x USB cable, 1.5mm 1x USB cable, 0.5m Magnet BitShoes Hook and Loop BitShoes Twist Ties 1x 9V batteries + Cable 1x USB Power Adapter + Cable 2x wheels 3x mechanical arms 1x standard mounting board 1x XL mounting board 1x Durable Storage Carrying Case Additional accessories

Learn how to code using the Sphero littleBits Code Kit. With this coding and electronics kit, students create games and make inventions while exploring programming and engineering concepts in the classroom. Snap together the easy-to-use building blocks and start inventing.  Includes 16 bits, 24 accessories, and helpful teacher resources mapped to Curriculum.  Complete 100+ engaging activities and 10 lessons using the free Fuse app and littleBits Classroom.  Students can work independently or in small groups of two or three per kit. New durable storage container for easy organisation and clean up. Get hands on with littleBits Code Kit today! Recommended for Grades 3+.  What’s in Sphero littleBits Code Kit for Kids?  1 USB power  2 buttons  1 dimmer  1 slide dimmer  1 pressure sensor  1 sound trigger  3 wires  1 branch  1 code bit  1 bargraph  1 servo (cross axle)  1 speaker  1 round LED matrix  1 Durable Storage Case NOTE: The previous square LED matrix has been replaced by a round matrix. Some images on this page may still contain the square matrix.

littleBits Wall Storage makes organising your giant collection of Bits a breeze. Always know where your Bits belong, and access them quickly and easily with 5 purple littleBits metal wall panels, 60 small plastic bins, and 20 large plastic bins.

Meet the electronics kit designed to teach STEAM principles and encourage exploration, experimentation, and creativity through hands-on learning. Developed with educators, the STEAM Student Set makes the engineering design process fun and iterative for students while giving you everything you need to easily implement 20+ hours of standards-aligned curriculum in the classroom. Unpack the STEAM Student Set and transform students into inventors! Engage up to 3 students per kit with 19 bits and 46 accessories   Run 20+ hours unplugged/no device required cross-curricular and standards-aligned lessons available on littleBits Classroom Open and guided STEAM challenges on littleBits Classroom that foster creative problem-solving skills and encourage self-expression and reflection Included Invention Guide containing Bit tips and 8 step-by-step challenges to get started Improved durable storage container for easy organisation and clean up & printed materials for instructional support and classroom implementation What’s in Sphero littleBits STEAM Student Set circuit kit? 1 power  1 USB power  1 button  1 slide dimmer  1 light sensor  1 temperature sensor  1 pulse  1 fork  2 wires  1 inverter  1 number  1 long LED  1 RGB LED  2 DC motors  1 servo & hub  1 buzzer  1 fan  1 Durable Storage Carrying Case Plus, access to littleBits classroom

Note: You must already have a STEAM+ Coding Kit or STEAM Student Set in order to use the expansion pack. Power up your STEAM learning with the littleBits STEAM+ Coding Expansion Pack designed to elevate the STEAM+ Coding Kit and STEAM Student Set experience. This expansion pack combines a curated selection of essential Bits and additional accessories from previous littleBits expansion packs that allow you to further supplement what you can teach and learn with the STEAM+ Coding Kit and STEAM Student Set. Additional Unit Plans are also included to easily expand your STEAM curriculum and empower students to take their inventions further. 15 Curated Expansion Bits 7 Additional Accessories Quick Start Guide for easy classroom implementation Additional Unit Plans: Science, Math, Computer Science, and Technology What's Included 1 Power & Cable 1 Sound Trigger 1 Proximity Sensor 1 Threshold 1 Accelerometer 1 Random 1 Wires 1 XOR 1 Makey Makey 2 ANDs 1 OR 1 Split 2 Latchs

The Sphero Craft Pack is your one stop shop for all the crafting accessories you’ll ever need to take your creations and inventions even further. With over 31 different items and 100’s of materials the Sphero Craft Pack was designed for both littleBits and Sphero robots. Highlights - The Sphero Craft Pack consists of the most commonly purchased  items to help take student inventions and creations even further. - Instead of sourcing all of the materials separately, everything is included in one box. - Pair with the BOLT Power Pack or the littleBits STEAM+ Class Pack to complete your MakerSpace. - Recommended 1-10 students per Sphero Craft Pack.

The littleBits At-Home Learning Starter Kit provides an easy-to-follow, flexible, and powerful solution for reinforcing STEAM learning at home. This kit is ideal for educators to send home for individualised learning and can be easily facilitated and guided by parents. Endless opportunities for invention Use this circuit kit to confidently engage kids at home with five independent or parent-guided STEAM-based inventions. Open-and-go introductory circuit kit to learn electronics Screenless learning experience; no device or coding experience required Access additional activities, curriculum guides, resources, and more in littleBits Classroom Engage individual learners with their own starter kit and turn their ideas into a reality with 5 bits and 12 accessories Recommended for ages 8+ What’s in the At-home Learning Starter Kit circuit kit for kids? Bits 1 p4 power 1 wire 1 button 1 slide dimmer 1 servo (cross axle) Accessories 1 servo mount bucket 1 mechanical arm 1 mounting board 1 battery clip 4 adhesive bitShoes 1 glue dot sheet 1 ball caster 1 9v battery 1 battery cable

The littleBits mp3 Player allows you to play your very own mp3 files using littleBits. Sending a signal to the mp3 player can make it work as a media player, sampler, or looper. Just load the mp3 files you want onto the provided SD card and you'll have music and sound effects in your next littleBits project in no time. The mp3 player reads mp3 files off of the SD card that is underneath the bit. To choose the order that files are played in simply rename the mp3 file so that it has a number in front of the file name. The mp3 player will then play your mp3 tracks in numerical order. Use the 'back' and 'forward' buttons to switch between tracks on the mp3 player. If you are in the middle of a song then double click the 'back' button to go to the previous track. Playback is started by sending a pulse or latch through the input signal line to the bit. The behaviour of playback thereafter depends on which of the four modes is selected. ONCE MODE: Once mode behaves much like a retrigger sampler. It will play only the current selected track. Begin playback by giving an input signal pulse to the bit. After a track is finished playback will stop. Subsequent triggers will repeat the same track. If a pulse is sent during playback it will start playback of the track from the beginning. LOOP MODE: Loop mode continuously plays the same track repeatedly. An input pulse or latch will start playback of the looped track. A subsequent pulse or latch stops playback of the track. NEXT MODE: Next mode plays a track and then upon subsequent input pulses will automatically start playback of the next track in the queue. Once a track finishes playing playback will stop. ALL MODE: All mode behaves most like a traditional mp3 player. Playback is started and it will play all songs loaded on the SD card in order, without interruption. Input pulses or latches will stop and resume playback. VOLUME CHANGE: If you find the maximum volume of the mp3 player is not suitably loud enough, you can add 12dB of gain by simultaneously pressing the back and forward buttons at the same time. To remove the extra boost, press the two buttons again to switch back to normal mode. HEADPHONE/BITSNAP OUT: You can either send the audio signal out through the headphones or through the output bitsnap. When headphones are connected to the bit audio will not be carried through the output bitsnap.  UNDER THE HOOD An Atmega168 is used to read data from the SD card. It also handles all playback options that are selectable on the card. MP3 decoding is done through the VLSI1053 IC. The VLSI handles the playback of all audio and makes requests to the Atmega168 when it needs more data to process. The VLSI then outputs the left and right channel data to the headphone jack. When headphones are not connected the two signals are mixed and amplified so that both channels are merged onto a single line so the audio can be passed to the bitsnap out.

Ready to incorporate a carrot, your sunglasses, or great-grandma into your littleBits creations? Now you can use everyday objects to trigger your Bits and control cursors on your computer’s keyboard, or even control your computer with Bits. Make a touchpad out of ANYTHING by attaching alligator clips (4 are included!) to the Makey Makey Bit. For example: you and a banana. When you touch the banana, you complete the connection, and the Makey Makey Bit sends a signal to either your computer (move cursor left or right) or to your bits (flash an LED or turn a motor). You can make 3 awesome interactions: Touch to Bit: Trigger your Bits with any conductive object. Touch a banana to turn on an LED, splash water to move a servo motor, or turn a watermelon into a bass drum! Bit to computer: Use regular Bits, like sensors and triggers, to control the cursors on your computer. Make a whimsical photobooth with your computer by using the sound trigger. Take pictures with a clap, sneeze-anything that makes sound. Touch to computer: Use any object that can hold electricity, like oranges, foil, or people, to control the cursors on your computer. The module connects to a computer through a micro USB cable and has three MaKey MaKey inputs which are mapped to left arrow, right arrow, and space bar/mouse click. Each one of these key inputs can be controlled by littleBits modules like motion triggers or light sensors.

The codeBit levels up your littleBits circuits by allowing you to program how your Bits work. Using the littleBits Code Kit app you can command this Bit to create unique sounds, movements, and animations. The codeBit dongle allows you to wirelessly upload code from your computer to your codeBit. The USB cable brings power to your USB power Bit and rechargeable battery. It will also send information between certain Bits and your computer.

The sequencer allows you to connect up to eight outputs and control them in sequential patterns. Sequences that would take as long as 4 days to program without littleBits will only take you seconds! Automatically cycle through the entire sequence Control the speed of the sequence using dimmers or sensors Run the sequence four ways: forwards, backwards, pendulum, or random Swap automation for full control and step through each part of the sequence using a button, sound trigger, or any other high signal input There are two clock modes that control when the module transitions from sequence step to sequence step. In “step” mode the sequence transitions to a new sequence step on input low-to-high transitions. In this mode, the clock output is high when the input is above 2.5V, and the clock output is low when the input is below 2.5V. In “speed” mode the sequence transitions to a new sequence step at a fixed frequency. The step frequency is proportional to the voltage at the input. At 0V input, the frequency is 0Hz (the sequencer does not step). At 5 volts the step frequency is approximately 80Hz. In this mode, the clock output is a square waveform at the step frequency The four sequence modes control the order in which the 8 sequenced outputs are activated. At any given time, there is exactly one of the 8 sequenced outputs set to 5V. All other outputs are set to 0V. “Forward” mode sets output 1 to 5V, then on the next step output 2 is set to 5V, and so on. After activating each output in turn, the sequence then continuously repeats, starting at output 1. “Backwards” mode is the same as “forward” mode, except that the sequence steps from output 8 to output 1 and is set to 5V at each step. “Pendulum” mode sets output 1 to 5V, then on the next step output 2 is set to 5V, and so on. Upon reaching output 8, the sequence reverses and steps down from 7 to 1. “Random” mode sets a randomly selected output to 5V at each step. UNDER THE HOOD The input signal is buffered by an opamp (U1), then passed through a single pole RC low pass filter, then a 2-pole active low pass filter (U3). The combined filters band limit the signal to 160Hz with an 18dB per octave filter slope. This signal is split into two paths. One path leads to the Analog-to-Digital Converter (ADC) of an Atmel ATMEGA168 microcontroller (U2). The other path leads to a General Purpose Input-Output (GPIO) pin on the same microcontroller. The path to the ADC is used in “speed” mode because in speed mode, we need to precisely measure the input voltage, and the ADC is precise. The path to the GPIO pin is used in “step” mode, because we need to quickly measure the timing of an input low-to-high transition, and the GPIO pin responds very quickly to transitions. Depending on the clock mode, microcontroller converts the measured input values into either the sequencer step speed in “speed” mode, or simply goes to the next sequencer step when it detects a low-to-high transition in “step” mode. These values are translated into signals that control the pins of the microcontroller connected to the various outputs.

Now you can record digital audio directly into your computer, or play digital audio from your computer through littleBits modules! Remix music from any audio software (like iTunes, Spotify and GarageBand) Integrate your Synth Kit with common audio workstations (Ableton, ProTools, Audacity, Traktor, Max/MSP) The w27 USB I/O module features 44.1K / 12-bit audio conversion for high quality sound. It is also “DC coupled”, which means that in addition to sending and receiving signals like music, it can also send and receive control voltages. This allows you to use software programs like Max, PD, and CV Toolkit with w27 USB I/O to control littleBits modules by creating “virtual” littleBits modules like sequencers, low frequency oscillators, and much more. You can also control the aforementioned programs with littleBits modules to create hardware controls for your software. The w27 USB I/O module will appear to your computer as an audio interface and its input and output routing can be selected as with any other audio interface. The module can only be selected as either an input or output device at a given time but multiple USB I/O modules can be used at once.

Now you can control your Synth Kit from MIDI-enabled instruments and computer software! Module can both send and receive MIDI messages Create your own MIDI controller with other modules like the keyboard, microsequencer, light sensor, and more! Control Synth modules with software like Ableton Live, Logic, and Pro Tools Includes: MIDI module, MIDI adapter cable micro USB cable Geek Speak The w5 MIDI module functions by acting as a MIDI-to-voltage converter (“MIDI in” mode) and a voltage-to-MIDI converter (“MIDI out” mode). The w5 MIDI module will show up in your DAW as a MIDI device. The note range of the w5 MIDI module is from C2 to C6. MIDI note C2 generates an output CV of 0.2V. Thereafter, the output CV increases by 1V/oct up to C6. Similar to the i30 keyboard and i36 micro sequencer modules, the w5 MIDI module has two outputs: A main bitSnap™ output that sends control voltages to other modules (for instance, an i31 oscillator) depending on which key is pressed and a “trigger out” output that sends a 5V, HIGH signal out to modules (for instance, an i33 envelope) when any MIDI note message is sent. Like with the i30 keyboard module, the i31 oscillators will need to be tuned to play the correct pitches. See the “Tuning” project in the Synth Kit booklet for more information. To help with tuning, standard digital instrument tuners can be used and there are many tuner Apps available for smartphones.  

Integrate your Synth Kit with other analog synthesizers like modular synths or analog keyboards! Control littleBits module behaviours like the pitch of oscillators, the cutoff frequency of filters and more from your analog synth gear. Control analog synthesizers with littleBits modules, like a bend sensor, light sensor or any other input from the littleBits library to create new control interfaces for your synth. Sync your littleBits to other gear like Korg’s Volca series. CV stands for “control voltage” and is a widely used term in the realm of analog synthesizers. A control voltage is a variable voltage signal that is used to control module behaviors ranging from the pitch of oscillators to the cutoff setting of filters and more. The CV module can be used for both CV and Gate/Trigger type signals used in analog synthesizers. The module is suitable for interfacing with modular analog synths, analog keyboards, as well as groove boxes like the Korg Volca series. The “Sync” ports employed in the Volca series of synths can be used to make your littleBits modules play in sync with your Volcas or vice versa. The 3.5mm connection jacks should be used with mono 3.5mm plug phono cables. CV In The CV module can scale incoming voltages as high as 12V down to the 5V system the littleBits system employs. To use the CV module to control your other littleBits modules, connect the control device to the “CV In” jack. CV signals that come in through the "CV In" jack are routed to the output bitSnap™. The "CV In" jack is a switching jack so that any CVs coming in through the input bitSnap™ are not routed to the bitSnap output. When using the CV module as an input, you can control the pitch of oscillator modules, the cutoff of filter modules, trigger the envelope module, or control the speed of the micro sequencer module (put the micro sequencer into “Step” mode for this). CV Out To use the CV module to control your other CV enabled synthesizer equipment, connect the control device to the “CV Out” jack. CV signals received from littleBits modules at the input bitSnap™ are routed to the "CV Out" jack and the output bitSnap™.

You will need a wireless receiver and a transmitter to use littleBits wirelessly. You can purchase additional receivers and transmitters. The wireless transmitter sends a signal to your wireless receiver and activates your littleBits circuit remotely! The three channels (labeled 1, 2, and 3) on the transmitter and receiver correspond to each other and can be used simultaneously. The module can transmit its signal to a distance of about 100 feet indoors. Multiple wireless receivers can be used with a single wireless transmitter, but only one wireless transmitter can be used in proximity to another wireless transmitter.

You will need a wireless receiver and a transmitter to use littleBits wirelessly. You can purchase additional receivers and transmitters. The wireless receiver module receives a signal from your wireless transmitter and activates your littleBits circuit remotely! The three channels (labeled 1, 2, and 3) on the transmitter and receiver correspond to each other and can be used simultaneously. The module can receive a signal at a distance of about 100 feet indoors. Multiple wireless receivers can be used with a single wireless transmitter, but only one wireless transmitter can be used in proximity to another wireless transmitter.

The littleBits tackle box is perfect for stowing Bits away in the workshop, or taking on the go! It has 2 levels of storage and customisable compartment sizes, thanks to the included dividers. It can store 450 Bits in up to 46 compartments.

The motion trigger is similar to the sensor on an automatic door: when someone is moving nearby, it sends an ON signal to the following Bits. It's very sensitive, so don't breathe unless you want to be detected! Try it with some LEDs to create a security light!

The servo is a controllable motor that can swing back and forth, or be turned to a specific position. Try attaching a flag to the servo to make it wave back and forth! Cross Axle: This servo has a cross axle shaft that works with any littleBits accessory with a cross axle opening. Hub Mount: Note that this bit is NOT compatible with the following kits. - Space Rover Inventor Kit - Cross axle mechanical arm (not available separately) - Cross axle motorMate (not available separately)

The number module displays information about the signal it’s receiving from your other modules. It features a two-digit, seven-segment LED display. In the “read” mode, the module displays information about the signal it’s receiving. In the “count” mode, the module counts up or down with each trigger. The counter can be reset by receiving a trigger at the reset bitSnap. Geek Speak This updated number module has 2 main modes and 2 settings under each mode. Use the 4-position switch to choose between the modes. READ MODE: Read mode has two settings: values and volts. The number module reads the voltage on the input bitsnap, then calculates and displays either a value between 00-99 or a voltage between 0.0 - 5.0. The voltage on the output bitsnap is a filtered PWM value that equals the voltage on the input bitsnap. COUNT MODE: Count mode has two settings: up (from 00-99) and down (from 99-00). A step to the next number happens on input low-to-high transitions. The voltage on the output bitsnap is a filtered PWM value that is proportional to the number on display. For example, if the displayed number is 50 then the output voltage is 50% of 5V, or 2.5V. The RESET bitsnap can be used in this mode to reset the number on display. In the "up" setting, the display resets to "00". In the "down" setting, the display resets to "99". The RESET bitsnap resets the number on low-to-high transitions. Under the Hood An Atmega168 is used to constantly read the signal from the switch and determine which mode the module is in. It also reads the buffered signal from the input bitsnap, and sends a PWM signal through a Sallen key filter to the output bitsnap. In "read" mode, the signal from the input bitsnap is passed from the ADC pin to the PWM output. In "count" mode, a step to a new number is triggered on a low-to-high pin-change interrupt on the ADC pin. A PWM lookup table is used to output the corresponding PWM value. The reset is also triggered on a low-to-high transition. The Atmega168 also controls the seven-segment LED display to display the correct value.