Wireless Scoreboard Kit (HC-12 433 MHz) – Expansion
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Prices updated: 13 Oct 2026
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About this product
A two-team wireless scoreboard built from two Arduino Uno boards. A battery-powered remote with Team A, Team B and reset buttons sends points over a 433 MHz HC-12 radio link to a receiver that shows the score on a 4-digit display. Each message carries a sequence number so a point is counted only once. The kit teaches wireless UART communication and two-device system design.
Specifications
- Age
- 14–16 years
- Level
- Advanced
- Controller
- Arduino Uno × 2 (not included)
- Radio module
- 2 × HC-12, 433 MHz
- Remote buttons
- 3 (Team A, Team B, reset)
- Display
- 4-digit
- Needs computer
- Yes (for uploading code)
- Soldering
- Possibly (if HC-12 pins are not fitted), with adult supervision
Frequently asked questions
How many Arduino boards do I need?
Two. One Arduino acts as the remote with three buttons and an HC-12 module, and the second drives the 4-digit display. The expansion version does not include the boards or USB cable.
Why are the messages sent with a sequence number?
The remote repeats each message with a sequence number, so the receiver can recognize duplicates and avoid counting one point twice.
