Dongfanghong semiconductor player

A fully automatic musical instrument improved from the June 1971 edition of "Dongfanghong Semiconductor Musical Instrument". Without using any microcontroller or embedded controller, you can automatically play the entire song "The East Is Red"

The digital part is divided into: active crystal oscillator, encoder, and decoder (the output part of the decoder requires flying wires to form and logic)

The analog part is divided into: sound source oscillator, envelope generator, multiplier, mixer

Note: The current version is produced according to the ideas of the book "Dongfanghong Semiconductor Player". For specific effects, please refer to the 1978 Zeng Houyi chime version of Dongfanghong.

The third version is currently being designed, and the expected effect is 95% similar to that of the Dongfanghong-1 artificial earth satellite.

After the third version is produced, the project files and materials will be created as a separate open source project and will not be placed in this project directory.