Circuit Biscuits
Biscuit jar
Circuit Biscuits Workshop

Biscuit Jar

Welcome to the Biscuit Jar: each module panel is a biscuit you can test, while utility panels help you organise, save, and review your lesson progress.

Choose A Biscuit
Try It Live
Save The Jar
1 Place your biscuit modules
2 Wire and test on the board
3 Save and reload your snapshot

How To Play Your Biscuits

Start with an empty breadboard and build your biscuit collection: place biscuits, wire them up, and save a snapshot of your setup.

Next time you open Biscuit Jar, load your snapshot so your virtual breadboard matches your real one, then tap the biscuit panels to play with each module.

If a Biscuit shows There's a Bug on your Breadboard or a Biscuit hint, become a circuit detective and compare your real breadboard with the diagram until every connection matches.

Status
Idle
Error Code
—
Connection
Disconnected
Last Update
—
Mode
Unknown
Detail
—
User
Not logged in
Saved Work
Layouts, pixels, RGB, and automation
Load a Breadboard snapshot into the embedded diagram view.
Log in to save this Biscuit Jar workspace.

Biscuit Jar Guide

📖 Docs
▾ Collapse
▸ Expand
⋮⋮ Move Panel
▶ Set Mode / Run
■ Stop
⏸ Pause
📖 Open Notes

Loading Biscuit Jar help…

Little Blinky Light

📖 2 DEV MCU

LED Pixel Board

Pixel Art Editor 8 x 32 manual bitmap
Brightness Auto
Animation Builder
8
Preview in Browser Preview the frames locally on browser.
Run on Device Read copies the device animation into the editor. Send uploads to device RAM and saves to flash. Play starts, Pause holds the current frame, and Stop ends playback.
No animation frames yet. Draw a bitmap, then add it as frame 1.
📖 4 DEV MAX

RGB Matrix

Selected #ff3366
RGB Animation Builder 8 x 8 colour frames
Preview in Browser Preview the frames locally on browser.
Run on Device Read copies the device animation into the editor. Send uploads to device RAM. Play starts, Pause holds the current frame, and Stop ends playback.
No RGB frames yet. Paint the panel, then add frame 1.
DEV RGB

Gyroscope & Accelerometer

Pitch
—
Roll
—
Yaw
—
📖 6 DEV IMU

Distance Sensor (Sonar)

Forward Distance —
Near Front of device Far
Range
—
📖 5 DEV SON

Clock

Time—

Text

Text—

Automation

Example Routines
Expression Help
Use plain expressions throughout automation. Quote string literals in actions.
Variablesdistance_cm, pitch, roll, yaw, mode_number, mode_name, error_code, time_hour, time_minute, time_second, time_hhmm, display_text, display_text_length, scroll_mode, animation_current_frame, animation_frame_count, animation_interval_ms, animation_playing, bluetooth_name, bluetooth_uart_baud, elapsed_ms
Helpersclamp, round, floor, ceil, abs, min, max, int
Condition expressions
abs(pitch)
roll
distance_cm / 10
mode_name
pitch > roll
Action expressions
DISPLAY_ANIMATION_FRAME {{ clamp(round(distance_cm / 10), 0, 7) }}
P {pitch} R {roll}
{mode_name}
HELLO {bluetooth_name}
Distance—
Pitch—
Roll—
Yaw—
Mode—
Text—
Frame—
Automation Routine Add blocks, watch live values, then run or step through.
Run in Browser Edit, simulate, and save the full routine in the app.
No automation steps yet. Add an action, wait, condition, or while loop block.
Run On Device Upload the firmware-safe Action and Wait subset to the board and manage flash storage.
Device automation supports Action and Wait steps only. Upload sends the firmware-safe subset to the board.

Live Feed

Feed Text—
Feed StatusIdle
Pick a friendly RSS source, or use a CORS-friendly JSON endpoint. RSS feeds use latest_title; weather feeds use values like current.temperature_2m.

The Terminal

Reference

Click a command name to fill the Raw Command box. Bitmap rows use eight uppercase hexadecimal values, one per display row. Animation frame indexes start at 0.

📖 3 DEV USB DEV BT

Explore Related Tools And Guides

Use Biscuit Jar as the hub, then branch out to wiring diagrams, lessons, and play experiences that use the same board features.

Learn The Hardware
Docs Library Open pupil notes, technical deep dives, device notes, and course planning guides. Device Notes Read module-specific guidance while using the dashboard. Device Gallery See the devices and their related resources.
Build And Play
Breadboard Snapshots Open saved breadboard snapshots or import a wiring JSON. Kitchen Turn ideas into rules and actions. Kitchen 8-12 Use the guided version for younger learners.