Showing posts with label Inverter. Show all posts
Showing posts with label Inverter. 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, January 12, 2012

A-165 Dual Trigger Modifier

The A-165 Dual Trigger Modifier contains two separate and identical trigger modifiers for use with logical / digital levels.
In fact it works pretty similar to the A-175 Dual Voltage Converter, only this module works on Gates, Clock and Triggers.

Each half of this module enables signals, generated by the A-100, to communicate with other instruments (such as an external sequencer), or is simply used for reversing a trigger's polarity.
Whatever signal is patched into the input is inverted by the module, and fed out of the Inv. Out (inverted output) socket.
At the same time, a short trigger signal (of roughly 50 ms) is generated every time an edge of the trigger pulse is sensed (negative as well as positive).
This trigger signal is available at the +/- output.
Two LEDs show the level of signal available at the two outputs.

Because the original and inverted trigger signal are often both needed at the same time, it is possible to use these two inputs as a mini-multiple - using one of them to send the original trigger to another module.

The A-165 manual has a few interesting patch-examples, but i use it the most in combination with my A-160/A-161 Clock Sequencer/Divider combo to mess up my rhythms.

If you are only looking for simple trigger inverters, you might want to take a look at the A-166 Dual Logic module which also has two simple inverters, only minus the  +/- pulse that the A-165 has.