Showing posts with label Logic. Show all posts
Showing posts with label Logic. Show all posts

Friday, May 29, 2015

Doepfer A-166 Dual Logic Video Tutorials by Raul Pena

Raul Pena just published the first tutorial video on the Doepfer A166 Dual logic module.

The A-166 is a Dual logic module with 3 inputs for each unit.
The logical states of the inputs ("1" = high / "0" = low) are linked together in 3 ways: AND, OR, EXOR (exclusive OR). The three functions are available simultaneously at three outputs with LED display of the output states.

Additionally two inverters are avaliable to obtain the inverted functions NAND, NOR and NEXOR.
The sockets of each triple unit are "normalized", i.e. the switched contact of socket 2 is connected to input 1 and the switched contact of socket 3 is connected to input 2.
Provided that no plug is inserted into socket 1 resp. socket 2 the socket is connected to the input above it.
This simplifies the usage of the module when only 2 signals are combined. E.g. the logic functions AND and OR have different neutral input levels ("1" is the neutral state for AND, "0" is the neutral state for OR).

Here's the playlist , future videos will be added automagically every week on Thursday or Friday.

Doepfer A-166 Dual Logic Tutorials by Raul Pena

Check out Raul's latest survey at
Other places to find Raul's World of Synths on the Web:

Also read: Doepfer A-166-2 Logic Module Announced
More info: http://www.doepfer.de/a166.htm

Thursday, November 14, 2013

Doepfer A-166-2 Logic Module Announced

Via the Doepfer A-100 Usergroup on Yahoo we found out today that Dieter and his crew are working on an additional logic module (A-166-2).

Not the new, but the 'old'
A-166 Dual Logic Module
You probably remember the original A-166 Dual Logic Module, which is a double logic device that combines digital control / clock signals.
Read all about that module HERE.
A typical application of this module is the combination of digital signals of the A-100 gates, clocks and triggers to obtain "gated" clocks or rhythmic clock patterns.

The new A-166-2 "...will also include - among other functions - a flipflop.
( The output will turn high as soon as the first pulse of the "gate stream at audio rate" appears and stay high until the gate turns low.)
Sometimes I'd like to have a flipflop function in certain patches.
A simple zero-crossing comparator could be added to this module too. 
The A-166-2 will probably also include a rising edge detector (outputs a short pulse at the rising edge of a digital input signal) and a falling edge detector (outputs a short pulse at the falling edge of a digital input signal).
I think also about a pitch-change-detector (or more general CV-change-detector). 
It outputs a signal whenever a CV connected to it's input changes (probably with three outputs: positive/negative/both). 

So far there is no front panel layout available as I'm still fiddling about the arrangement of the sockets and controls, which features will be finally included and which front panel width (4/6/8 HP) is the best compromise."

Price and availability are still unknown...

Saturday, September 24, 2011

A-166 Dual Logic Module

" A Logic Gate is an idealized or physical device implementing a Boolean function.
It performs a logical operation on one or more logic inputs and produces a single logic output. Logic gates are primarily implemented using diodes or transistors acting as electronic switches. "

The A-166 Dual Logic Module is a double logic device that combines digital control / clock signals.
A typical application of this module is the combination of digital signals of the A-100 gates, clocks and triggers to obtain "gated" clocks or rhythmic clock patterns.

It contains 2 identical units with 3 inputs for each unit.
The logical states of the inputs ("1" = high / "0" = low) are linked together in 3 ways: AND, OR, EXOR (exclusive OR).
The input sockets of each triple unit are "normalized", i.e. the switched contact of socket 2 is connected to input 1 and the switched contact of socket 3 is connected to input 2.
The three functions are available simultaneously at three outputs with LED display of the output states.

Additionally two separate inverters ( like the A-165  ) are available that are very useful.
These can even be used to invert a signal before it is fed into one of the two logical units.
All other outputs can be fed back to the module's inputs also... in that way you can create very nice and very complex rhythmic triggers.

More on Logic Gates on Wikipedia
...and on Whatis.com