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 Forum index » DIY Hardware and Software » YuSynth
In praise of the YuSynth Logical Gates
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kkissinger



Joined: Mar 28, 2006
Posts: 1221
Location: Kansas City, Mo USA
Audio files: 29

PostPosted: Mon Feb 18, 2013 9:47 pm    Post subject: In praise of the YuSynth Logical Gates
Subject description: Incredibly useful
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I've already etched three of the Yusynth Logical Gates PCB and I'm preparing to etch my fourth.

One of them is configured as Yves' published on his website. I use another to condition the Gate and Trigger signals from my (two) keyboards. And the third is for three gates that are AND/ON NOR/OFF (That is, it takes a logical AND to drive the output high and it stays high until both inputs go low.)

And I'm now preparing to etch yet another Logical Gates PCB to implement a "skip next clock after reset" function (once I have this built, I will likely post a little more info on it).

The beauty of this PCB is it's versatility -- it is one of the most easily modified circuits imaginable and the individual circuit blocks can be utilized for many applications.

Each function has one or two inputs that condition the input signal -- that is, it converts the input signal to a solid 10v (logical high) signal. The input is very high impedance -- they utilize 1meg resistor coupling from the input! At the output end of each gate is a transistor (open collector style) driver that produces a solid 10v (logical high) signal with plenty of current to drive dozens of modules. The logical lows are clean and dependable.

Since the circuit utilizes discreet transistors, it is very easy to modify.

In my newest circuit, I utilize a 4017 cmos -- the circuit blocks on the Logical Gates provide normalized logical signals to the 4017 chip (also, check out the Yusynth Clock Divider). Additionally, I utilized the output drivers, the LOGICAL NOT, and LOGICAL AND.

This is a really fine project -- well worth the effort to learn the circuitry. It has become a kind of "swiss army knife" for processing logical signals on the synthesizer.

Many thanks to Yves for this, and all his other, designs. Smile

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http://kevinkissinger.com
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kkissinger



Joined: Mar 28, 2006
Posts: 1221
Location: Kansas City, Mo USA
Audio files: 29

PostPosted: Mon Feb 25, 2013 8:26 am    Post subject: Follow up Reply with quote  Mark this post and the followings unread

Here is a write-up on the Skip Clock after Reset function that I mentioned in the above post:

http://electro-music.com/forum/post-379367.html#379367

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http://kevinkissinger.com
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