A pocket-size Decision Maker board powered by a rechargeable supercapacitor—no batteries needed.

MCU: ATtiny84A
Apps: Decision maker, Reaction test, Dice, Double dice, Rock-Paper-Scissors, Stopwatch, Coin toss, Blackjack
Display: SSD1306 OLED 0.96"
Recharge: via [USB/craange charger

Perfect for classroom demos, design sprints, or a smarter desk toy.

Why your students will love it.

• All-in-one board – Integrated USB-C socket and slide switch make it easy to mount your project in almost anything while keeping electronics hidden.

• Instant results – Pre-loaded with firmware so you use the product right after it's been charged. Or choose to program your own responses with full code available on our GitHub Page

• Creative freedom – Build into their own imaginative project.

Kit Options

Option 1 – Basic Kit

Everything you need to build the Decision Maker board powered by a rechargeable supercapacitor.

Includes all components, OLED display, ATtiny84A microcontroller, and pre-programmed firmware with 8 built-in functions (Decision Maker, Reaction Test, Dice, Double Dice, Rock-Paper-Scissors, Stopwatch, Coin Toss, Blackjack).
Perfect for classroom use or individual makers.

Note that this option will require a USB A to C lead as the pupil soldered USB socket may not charge on USB C-C connections

Option 2 – USB-C Enhanced Kit

As above but includes a pre-soldered USB-C charging socket . This option will mean the board is able to be recharged from any USB lead or port.

8-in-1 Decision Maker/Game Board — Supercap Powered

From £7.50

Number of units

Quantity

Included in both versions (Basic & USB-C Enhanced):

ATtiny84A microcontroller – pre-programmed with 8 built-in apps
(Decision Maker, Reaction Test, Dice, Double Dice, Rock-Paper-Scissors, Stopwatch, Coin Toss, Blackjack)

0.96″ OLED display (I²C) – crisp, bright white or blue text display

PCB – custom-designed ‘Decision Maker’ board with labelled silkscreen

Supercapacitor (1.5 F) – provides rechargeable power, no batteries required

Tactile push-button switch – for input and menu control

Tilt switch – for shake-based actions

Piezo buzzer – gives satisfying feedback tones

Pin headers and connectors – for assembly and charging options

Resistors and support components – for correct sensor and buzzer operation

Assembly guide & sketch (available on GitHub)

Option 2 - Additional in the USB-C Enhanced Kit:

Pre-soldered USB-C charging socket

USB-C power management components (resistors & diodes for safe charging)

USB-C cable compatibility – works with any standard USB charger or power bank

8-in-1 Decision Maker/Game Board — Supercap Powered

What's in the Kit