The littleBits UV LED (or "UltraViolet Light-Emitting Diode") Bit sends out a special kind of light. It looks purple to the eye, but it has some special abilities, like making white fabrics and certain inks glow in the dark. If you have a pen that writes in UV-sensitive ink, you can use it to reveal secret messages.

The synth speaker amplifies your sonic explorations! You can control the volume with a dial at the front of the module. It also features an output jack that you can connect to headphones, an amplifier, or a computer. The speaker is connected with 3M™ Dual Lock™ so it can be removed from the circuit board. To reattach, simply press together firmly.

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 RGB LED (or "Red-Green-Blue Light-Emitting Diode") Bit is a special light whose colour you can adjust. Use the included screwdriver to adjust each of the colour channels to get almost any colour. Use the RGB LED when you want to match the light to the colour of your creation!

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.

The littleBits long LED (or "Light-Emitting Diode") Bit is another lighting option. We call it the "long" LED because the light is tethered to the board by a cable. This lets you put the light in some interesting places: one of our favourite tricks is to place the LED in the middle of a foam ball to make it glow!

The littleBits LED (or "Light-Emitting Diode") Bit is a very small board that shines a nice green light. It's our go-to when you want to light something up.

The littleBits IR LED (or infrared light-emitting diode) module sends out light with longer wavelengths than visible light, similar to the light in your remote control. It’s invisible to the eye, but many digital cameras can see it! Try using it to activate the light sensor or remote trigger.

The littleBits fan Bit is just what you'd think: a small electric fan tethered to a littleBits module. It's great for those hot summer nights. Use our little fan to create fluttering movement in your creations or just to keep yourself cool.

The DC (or "direct current") motor rotates a small shaft you can attach anything to. Try attaching a wheel! Use it to spin, turn, twist, and roll.

The buzzer Bit is just what it sounds like: it makes a noise that you just can't ignore. It buzzes whenever it gets an ON signal. Try using it to make your own doorbell or alarm!

The littleBits bright LED (or "Light-Emitting Diode") is a small module that puts out a big light. Just like our other LED modules, it's a great way to shed some light on your creations. Choose the bright LED when you want a LOT of bright white light. The bright LED features a half watt super bright LED that responds to incoming voltages linearly. The more voltage it receives, the brighter it gets.

The bargraph is one of littleBits favourite Bits: The bargraph shows you how much signal the Bit is receiving with a display of 5 light-emitting diodes (LEDs) in different colours. Try it with a pressure sensor to make your own strength-o-meter.

The toggle switch Bit is sturdy on/off switch that you can use to activate your creations with a nice, solid click. Try using it after a USB power Bit as an on/off switch for your whole creation.

The timeout Bit is a settable timer. Try it after a button and follow it with a light. Press and release the button to start the countdown. In "on-off" mode, the light will go on as soon as you release the button and the timer will start counting down to turn-off time. In "off-on" mode, the light will go out when you release the button and will turn back on after the timer reaches the allotted time. Use the included screwdriver to set the timer. Try it with a motion sensor and buzzer to create an intruder alarm!

Think of the littleBits threshold as a toll booth for signal passing through your circuit. The threshold compares the incoming voltage coming from the bit snapped before it against the voltage amount you’ve set by the threshold knob. If the incoming voltage value is greater than the selected voltage, the threshold will allow the signal to pass and activate any bits (lights, motors, etc…) following it. If not, then nothing will be activated. Use it to make any sensor module into a trigger module! The threshold is a minimum parts count design, using only a single opamp to accomplish the task of comparing the input signal to an onboard reference that is set via the potentiometer control. U1 is configured as a non-inverting comparator with approximately 100mV of hysteresis provided by R1 and R3. VR1 provides the comparator's reference. C1 is a bypass capacitor for U1 that sources current to the opamp during fast switching events.

The littleBits temperature sensor responds to the temperature surrounding its probe. The higher the temperature it senses, the more signal it sends out. The temperature sensor determines temperature via the IC that is located on top of the board. It communicates via I2C with an MCU located on the bottom of the board. The MCU gets a temperature reading in Celcius, applies a hysteresis to the reading, then converts it to farenheit if necessary. The final determined temperature is converted to a number module readable analog value. Every 50mV on the output of the bitsnap represents a single degree in either Farenheit or Celcius. Since heat will conduct through the board itself, there are slots around around the temperature sensor which provide thermal relief from board conductivity. Not Waterproof: littleBits are not waterproof. Please do not put the temperature sensor in your mouth to take your temperature. Plus, they taste weird so you will wish you hadn’t.

The littleBits slide switch is a small and convenient way to turn your creations on and off. It uses a sturdy plastic lever to switch back and forth. Try it with any of your favourite Bits, like the DC motor or bright LED!

It functions just like a light dimmer you might find at home, or a volume fader in a recording studio. Follow it with an LED for some adjustable mood lighting.

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.

The roller switch is a handy Bit - it has a little lever with a wheel, and activates when something moves past it. You can also flip the mode switch to make it turn off when the lever is pushed in. Try that mode with an LED to make a fridge light.

The remote trigger lets you use a common remote control with your modules. Make your littleBits circuit and point your remote control at the remote trigger’s sensor. Then, press any button on your remote control to activate the module. The remote trigger will work with almost any button on a remote that uses infrared light to send signals.

The littleBits random module has two modes: "noise" and "random voltage". In "noise" mode, it outputs white noise, like a television set not tuned to any channel. In "random voltage" mode, it outputs random voltage signals that can control oscillators and make them play random pitches. Use the "trigger out" connector and "speed" dial of the micro sequencer to set the timing of the random output pulses and use an input Bits module like a dimmer to control the range of your random outputs.

This wear resistant nozzle by Micro Swiss suits a range of printers with an M7 thread and 0.6mm hole. It has a Wear Resistant High Lubricity TwinClad XT Coating this makes it a excellent choice when printing with abrasive/wearing material such as Bronze, Copper, Aluminium or Carbon Fibre filament.TwinClad XT is a nickel composite coating for very low friction. Over a 360 brass base, it gives a lower coefficient of friction than PTFE (Teflon) over nickelThis nozzle is used on MK10 extruders. Designed to work with machines with a PTFE tube lined barrel running into the nozzle ALWAYS run preheat before changing nozzles to avoid stripped threads. Is is compatible with: FlashForge Creator Pro FlashForge Creator X FlashForge Dreamer Dremel Idea Builder PowerSpec 3D Pro PowerSpec 3D X Wanhao Duplicator 4S Wanhao Duplicator 4X Wanhao i3 Monoprice Maker Select 3D Printer v2 Cocoon Create 3D Printer Specifications: Hole - 0.6mm hole.Thread - M7, 4mm long.Total Length - 13mm.Head width - 9mm (for better heat retention)Base - Flat at screw/thread end (click photo under more info page for details).Tip - may have a slight flattened area.Filament Size - suitable for 1.75mm filament.Coating - TwinClad CoatedDimensions - : 13 x 9 x 9mm