This is another card made by the Circuit Scribe conductive pen, which can play a song and flash the LEDs. The circuit is based on the Attiny85 microcontroller to make the sound and control the LEDs. The microcontroller only has 5 useable pins, 1 for the buzzer (speaker) and 4 for the LEDs, so there are total of 12 LEDs which can be controlled with 4 pins using the Charlie-multiplexing method. Continue Reading..
Tag: music
30
Apr
Apr
This is a birthday gift for my wife, which based on the idea of Chan to make a SD card music player. The circuit simply consists of an Atiny85 microcontroller, SD card slot, low-dropout voltage regulator, 3.7V Lipo battery, battery charger IC and few resistors and caps. The circuit board can be nicely fitted inside a small box, which is served as a base of the flower, and the “flower” is actually the speaker.
Flower music player