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October 15, 2013 / Mr Megahertz

PCBs are here!

Today, I just recieved the first ten PCBs for my chiptune synth kit. The black solder screen looks really good. :D
I’m now waiting for the last parts to make a prototype and to design its case.

10 YM2149 synth PCBs

October 5, 2013 / Mr Megahertz

YMWave Schematics

Here are my YM2149 Synth schematics.
Ten PCBs will be manufactured this month, as a first test. :)

No Arduino bootloader anymore, only plain avr-gcc code.

YMwave schematics

September 1, 2013 / Mr Megahertz

News about my YM2149 Synth


I’ve got some messages asking me if I planned to sell a finished version of my YM2149/AY-3-8910 synth. The short answer is: yes.

I’m working on the PCB and the firmware of this synth. As I’m not going to sell thousands of it, it will certainly be sold as a ready-to-solder kit.

Schematics and software code will be public. :)

More to come!

July 31, 2012 / Mr Megahertz

Mood light made of a LED lantern

A quick and dirty afternoon project.

Read more…

May 2, 2012 / Mr Megahertz

YM2149 and MIDI

I’m still working on my YM2149 synth project. Read more…

April 9, 2012 / Mr Megahertz

YM2149 sound generator, Arduino and fast pin switching

I spent my childhood with an Atari STe and its bleepy sounds. Recently, I purchased its sound generator on eBay: the YM2149 chip (made by Yamaha) or the AY-3-8910 (made by General Instruments).

I would like to make a chiptune MIDI synthesizer with it, but I thought it was a good start to play existing tunes.
Read more…

October 9, 2011 / Mr Megahertz

Sharing Links Physically

Why should we only share things we like on Facebook, Twitter or by email?

I’ve imagined a fun application with one of these small thermal printers. Although these printers are really Arduino friendly I coded a .Net class to use them directly with a computer. Then, I made a simple Safari extension which allows to print the URL of the current page… with a QR Code, of course!

The width of a paper roll is perfect for this purpose, and giving a piece of paper to share a link might be quite fun.

This extension sends a command to a small server app which is a background service connected to the printer. It’s not perfect, I’ve made it rather quickly, but it works fine.

I used the MessagingToolkit’s QR Code open source library. Ok, let’s have a look at it.
Read more…


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