> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # littleBits Sequencer **Type:** Product page · **SKU:** LBH804 · **Brand:** [LittleBits](https://core-electronics.com.au/brands/littlebits-australia) · **GTIN:** 810876020299 **Page:** https://core-electronics.com.au/sequencer.html ([markdown](https://core-electronics.com.au/sequencer.html.md)) 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! ## Pricing - **Price:** $77.99 (inc GST) — $70.90 AUD, exc GST - **Quantity discounts:** 6+ $69.25 (exc GST) · 12+ $67.83 (exc GST) - Special pricing may change at any time. ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 31 and Sep 01. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=LBH804:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/LBH804:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description 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 Check out littleBits Sequencer Tips + Tricks! **GEEK SPEAK** 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. Have questions? Mingle with the pros on littleBits forum! **Technical Details:** - Dimensions (mm): 1.13(H) x 0.06(W) x 4.63(D) - Product Weight: 0.02 lbs (0.01 kg) - Recommended Age: 8+ - SKU: 650-0008 - UPC: 810876020299 - Extra Materials [Circuit Diagram - PDF](https://core-electronics.com.au/attachments/localcontent/LB_BIT_i22_sequencer-v03(rev2_3)_903001de137.pdf) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/6/5/650-0008.jpg)