The Addition Shield LEDx12-C is a board with 12 LEDs arranged in a circle and a buzzer at the center to produce sounds. It also includes the necessary current-limiting 330 Ohm resistors and the headers to connect it to the Tinusaur main board. It is ideal for extending the functionality of your Tinusaur kit.
The Shield LEDx12-C board utilizes the principle of the Charlieplexing circuit, which allows the use of only four input/output ports to control 12 LEDs.
IMPORTANT: To use this shield board, you must also have a Tinusaur main board, as it is mounted on top of it.
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- The Addition Shield LEDx12-C is suitable for 6th to 12th-grade students.
- Assembling the board takes between 40 and 50 minutes.
The Shield LEDx12-C board is mounted on top of the Tinusaur main board. For example, you could use the 12 LEDs in a custom project to indicate the time that has passed and sound an alarm with the buzzer.
The LEDs are connected to the I/O ports PB0, PB1, PB2, and PB3 of the ATtiny85 microcontroller. The buzzer is connected to the PB4 port.
Activities
(1) Assembling the Shield LEDx12-C board and learning the basics of soldering, where and how to place electronic components on the PCB, what polarity is, and how to comply with it.
(2) Electrical circuit. Learn how the resistor, LED, and power source are connected and what the applicable laws of physics are – electricity in particular.
(3) Input/Output Ports. Learn how to use the input/output ports of the ATtiny85 microcontroller by using the 5 LEDs connected to the PB0, PB1, PB2, and PB3.(4) Charlieplexing. Learn how the Charlieplexing circuit works to use only four input/output lines to control 12 LEDs.
The Shield LEDx12-C board could also be used for more complicated experiments and projects. For example, the implementation of PWM (Pulse-width modulation) to make each LED light up with different intensity.
Technical description and contents
The Addition Shield LEDx12 package consists of just a few components.
- PCB LEDx12-C.
- Resistor 330 Ohm – 4 pcs.
- LEDs – 12 pcs.
- Buzzer, passive – 1 pcs
- Headers – 1 pcs.
- Other parts (optional).
IMPORTANT: The product you get might have slight differences from what you see in the pictures or the detailed description. The functionality remains as described.
Resources
Guides
We prepared very detailed instructions for assembling and using all the boards and other items in the kit. They are available in PDF and other formats.
Video
For some of the boards and other items, we also produced detailed instructions and other helpful materials in a video format, available on YouTube or our website.
Docs & Specs
Additional resources such as specifications, technical descriptions, sample programs, and other useful materials are available on our website.
Development Environment
We created the Blocktinu, developed specifically for the Tinusaur boards, allowing you to create programs using blocks (similar to Scratch) and directly in the C language.
Still wondering what educational products to choose for your new STEM space or initiative?
Here are the three essential components that we give you:
Educational
STEM product
A real educational product developed by a team of skilled educators with many years of practical experience.
Educational
content
Adaptable and ready to be used in class curriculum. Developed for teachers by teachers and tested in practice.
Training for
educators
Extensive online teacher training based on our original STEM methodology includes theory, practice, and certification.