My new DS8 Clone isn’t ready yet, but…

DS8, , , ,
Breadboarding is fun!

I’m still working on my DS8 Clone. I made 2 previous versions, but I’m not satisfied enough. The fact is DS7 or DS8 drums and their “clones” suffer from the original design flaws. All those clones are copies from the original model, with some additions. But they inherit the poor quality design. To mention a few, the low amplitude output, the poor noise source, the linear release enveloppe shape, the lack of punch on attack, the lack of 1 V/Oct tracking… And it’s not easy to debug.

So, I decided to completely redesign the guts of my next Drum Synth. Same behaviour, better characteristics.
Continue reading My new DS8 Clone isn’t ready yet, but… →

Prototyping Board 2: Arduino shield

Stripboards & Protoboards, ,
Prototyping Board #2

This board is the number 2 in the “Permanent Breadboards” series. This time, the layout is no more a simple direct copy of a classic breadboard: it’s a mix between a stripboard and an Arduino shield!

The Prototyping Boards are designed to offer the same look and feel as classic breadboards, with the ability to solder connexions: yes, you will have to solder 🙂
In other words, you’ll keep your prototype for life time!
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Here’s an excerpt from a topic about temperature compensators in exponential converters on Modwiggler forum:
http://www.modwiggler.com/forum/viewtopic.php?t=120518

Frequency drift is caused by the two transistors in the exponential converter being at different temperatures and minimised by them being on the same substrate. This is temperature balancing. Temperature compensation with tempco resistors tries to stop the Volts/oct changing by matching the exponential term which is proportional to absolute temperature. At 25 deg C the amount of change for 1 deg is 1/(273 + 25) = 0.33557% or 3355.7ppm. That is where the figure comes from, it is not 3300pmm or 3000ppm or 3500ppm or anything else.

Continue reading About Tempcos in exponential converters →