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
Included in both versions (Basic & USB-C Enhanced):
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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
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PCB – custom-designed ‘Decision Maker’ board with labelled silkscreen
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Supercapacitor (1.5 F) – provides rechargeable power, no batteries required
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Tactile push-button switch – for input and menu control
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Tilt switch – for shake-based actions
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Piezo buzzer – gives satisfying feedback tones
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Pin headers and connectors – for assembly and charging options
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Resistors and support components – for correct sensor and buzzer operation
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Assembly guide & sketch (available on GitHub)
Option 2 - Additional in the USB-C Enhanced Kit:
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Pre-soldered USB-C charging socket
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USB-C power management components (resistors & diodes for safe charging)
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USB-C cable compatibility – works with any standard USB charger or power bank
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