Birthday card with music and blinky lights
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A quick hack to create a musical birthday card. Plays "You Are My Sunshine" and blinks three LEDs.
A speaker is connected to pin 5 (PB0). The LEDs are connected to pins 2, 3, and 7 (PB2, PB3, PB4).
The wiring was created on the card using a Bare Paint Pen. This has enough resistance to not need any physical resistors. When prototyping, current limiting resistors should be used on the speaker and the LEDs.
Birthday card with music and blinky lights