Hello, i'm currently working on a project, and i wanted to remove all the solder mask from the board, so the board can look ivory white just like the old 1960-1970s boards.
Does anyone know how to do this ?
Thanks in advance.
Hi ! I'm 14 and i just finished my project which is a music player using a AY-3-8910, i'm using my own file format to play music (Rapid explanation : the esp32 will execute the next 9 bytes of the file every 20ms (which is 50 Hz just like PAL and SECAM system)), the 9 bytes are :
R0, R1, Va, R2, R3, Vb, R4, R5, Vc
And after reading the 9 bytes, the ESP32 will write in the different registers so the YM2149 can create sound.
I use a python code to transform a 3 channel midi into my file format, the frequency are adapted to work correctly with the YM2149's clock frequency (1.789772 MHz, inspired by ATARI ST system)
The ADSR (which is not really an ADSR but more a basic fade out and in transition) is created by the software and not by the hardware integrated ADSR system of the AY-3-8910.
You'll find the Source code and schematics in a link below in the comments.
If you have any thought on this project, let me know !
Hope you liked it.
Hi, i just made a circuit with an AY-3-8910 and a ESP32, to see if everything's good, i searched for circuit simulator that would allow me to simulate my circuit to see if everything is right. But, i didnt manage to find a single one that would allow me to include an AY-3-8910 / YM2149 or any old chips. So, do you know any software that would allow me to test circuits with old chips ? Thanks !
Hi ! I just made on easyEDA a small circuit designed to make music with an AY-3-8910 / YM2149 controlled by an ESP32. So i was just wondering if they are any mistakes and how to fix them. Thanks !
PS : The Header H2 is not a mistake, it's just a connector placed here so i can change the amplification system whenever i want by connecting different amplificating circuits.
Edit : URL of the schematics : https://github.com/MaxRetroElec/YM2149-AY-3-8910-ESP32-Project