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Usability 2/4
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Content 4/4

A christmas tree ornament made with 90 LED matrix, a buzzer, 8 touch buttons, powered by a rechargeable Li-ion battery. It uses a ATSAMD21 microcontroller, so it's compatible with Arduino and CircuitPython.

It can show animations in the buit-in LED matrix, reproduce Chiptune sounds using the buzzer and interact with a user by touch buttons present in the circuit board. You can use it to play some simple games!

The USB Type-C connector is used to charge the lil-ion battery and to upload firmware to the microcontroller.


Bill of materials used in this project

IS31FL3731 LED driver
1
ATSAMD21G18A-A
1
0.1uF 0603 capacitor
3
1uF 0603 capacitor
8
20k 0603 resistor
4
5K1 0603 resistor
2
0r 0603 resistor
2
HRO-TYPE-C-31-M-12
1
15pF 0603 capacitor
2
10k 0603 resistor
1
MPR121 Capacitive Touch Sensor Controller
1
4k7 0603 resistor
2
100k 0603 resistor
2
75k 0603 resistor
1
4.7uF 0603 capacitor
2
2k 0603 resistor
1
MCP73831 Li-ion Battery Charger
1
AP2112K-3.3 Linear Voltage Regulator
1
SWITCH-SPDT-SMD-RIGHT-ANGLE
1
SW_SPST
1
Crystal 32.768kHz
1
Buzzer
1
Conn_ARM_JTAG_SWD_10
1
Li-ion battery
1
0805 white LED
90
Dec 28,2020
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    • andrebla from BRAZIL
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