µ[micro]electronics info

A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.




Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.

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SD Audio Player with ATTiny

This is a simple SD audio player biult with only an 8-pin microcontroller (ATTiny85).

A minimalistic design: WAV player, which can play stereo WAV from SD card using the 8-pin ATTiny's PWM outputs. Author says: 8-pin AVR microcontroller has two fast PWM outputs in 250kHz carrier frequency. This enables to output a wide frequency range audio signal. I built an audio player with the 8-pin AVR and an SD memory card (SDC). The SDC can be controled with only six lines, two for power supply and four for control signals.

Read more: Simple SD Audio player

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