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May 27, 2015 / Mr Megahertz

WaveDrom, a nice time diagram editor

A few days ago, I read an article on hackaday about a new time diagram editor.

It’s called WaveDrom, and it’s an online service. With a few lines of JSON code, you can draw neat time diagrams.

Here’s a picture of what I did:

YM2149 bus modes

YM2149 bus modes

And here’s the corresponding code:
Read more…

February 25, 2015 / Mr Megahertz

Small Midi Development Board

Midi Dev Board picture

Midi Development Board

I have sometimes to deal with some quick and dirty MIDI projects, and wiring a socket on a breadboard can be quite delicate because of the traction force from the cable. So, I’ve designed a small dev board who features a MIDI input (with its 6N137 active optocoupler), a MIDI output, and three RCA connectors. Read more…

August 30, 2014 / Mr Megahertz

YMWave – Revision B Schematics

The PCB files of this board revision are sent to the factory. This new version will include a mono switch and separate channel outputs. These boards should be error-free, and therefore sellable. 🙂

YMwave Rev. B - Schematics

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. 😀
I’m now waiting for the last parts to make a prototype and to design its case.

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.

-Schematics removed, rev. B is available

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…