A/B ++switch – patchbay - multiple

Manual V1.0

The A/B ++ module is an utility that combines several functions into two independent parts:

In the upper part, a passive A/B switch and at the bottom, a patchbay / multiple (also passive). Thisset allows a lot of combinations ...

Connecting the ribbon cable

! Be careful to always respect the connection direction of the tablecloth: by convention, the coloredpart (usually red / pink) of the ribbon represent -12V !

Note : on all PCB , the -12V « red line » is screen printed near the power connector.

Presentation

Section A/B Switch

1 : Selector switch IN/OUT A (or) Off (or) IN/OUT B2 : Connector IN or OUT3 : Connector OUT or IN A + LED dedicated4 : Connector OUT or IN B + LED dedicated

Section patchbay / multiple

5 : Explanatory screenprint of patchbay routing6 : IN/OUT*7 : IN/OUT*8 : IN/OUT*9 : I/O particular since it modifies the internal routing*10 : Selector multiple X+Y11 : LED indicating the link X+Y12 : Seector multiple Y+Z13 : LED indicating the link Y+Z

*more details in the« section patchbay » below

Section A/B switch passif

This section of the module (totally independent of the patchbay) allows to have an input oriented to two outputs to choose from, or, conversely, two inputs to choose an output. Silkscreening represents both options: Option 1 = 1 IN to 2 OUT, read the normal font Option 2 = 2 IN to 1 OUT, read the font in parenthesis

Option 1) An incoming signal in (out) can be either :– directed to out (in) A (la LED A illuminates under the action of the switch)– mutated (central position Off)– directed to out (in) B (la LED B illuminates under the action of the switch )

Option 2) Two incoming signals out (in) A and out (in) B can be either :– directed to in (out) (la LED A ou B lights up according to the selected input) – mutated (central position Off)

Example of use A/B Switch

Option 1)

An oscillator that can be directed to an A or B filter

(instead of the OSC, we can imagine a CV signal volt/octave, which will be directed to 2different v/o inputs, or the output of a module that would be oriented to two differenteffects, etc ... there are many possible combinations... )

Option 2)

Two LFO's A & B that can be directed to the CUT of a filter

(as for option 1, instead of LFOs, we can imagine 2 different OSC's that would be directedto 1 filter, etc ... again, many possible combinations...)

LFO BEx. : SQUARE

LFO AEx. : SINE

FILTERCUTOFF

Filter BEx. : High pass

Filter AEx. : Low pass

OSCILLATOR

Section patchbay passif

Patchbay has 3 identical vertical slices: X, Y & ZIt takes the philosophy of a classic audio patchbay, we find the same modes, except that here everything is accessible directly in front. All signals are accepted.

The 4 "jack 3.5mm" connectors can be inputs or outputs depending on the connections chosen.

The silkscreen panel briefly explains the internal routing, depending on the connections chosen.Note: Silkscreening takes the same form as traditional patchbays. Here is the correspondence:

Legende Serigraphy 1 = Panel Equivalence Serigraphy 2 = Panel Equivalence

Explanation of patchbay internal routing

If no cable is connected in 4,internal routing links 1, 2 & 3

If a cable is connected in 4,the link between 1, 2 & 3 is disconnected ,1 & 3 are isolated from 2 & 4

Example of use

Imagine that we enter an audiosignal in 2, and that we come outin 1 ...

By connecting a cable in 4, weinstantly divert the output ofthis signal which will now bedirected in 4 towards an effectfor example ...

The possible uses are as numerous as your imagination ☺ You can also help you with instructions forpatchbay audio to better understand their roles ...

Front Front

Another example

Slice X: oscillator connected in 2, it appears in 1 and 3 (multiple)

...by connecting a cable at 4, the OSC 1 is immediately routed to 4 and disconnected from1 & 3...

...since the connections 1 & 3 are independent and interconnected, we can either keep therouting to go back, or modify it completely...

Each slice being independent, you can for example enter 3 differents OSCs in each of theslices X, Y & Z in this example, this allows you some freedom on their routing...

OSC 1

To Filter A

To Filter B

OSC 1

To Filter C

To Filter B

OSC 1

To Filter C

To Filter B

To Filter A

OSC 2

Section multiple passif

The passive multiple, accepts all the signals. For CV volts / octaves, it is better to limit X2 to maintaina good tracking, ie a tuning respected on several octaves.

The patchbay can be used alone, transform into multiple or combine patchbay + multiple.

Explanations

Indeed, a signal entering in 1 will be multiplied in 2 & 3 (ditto if it enters 2, it will be multiplied in 1and 3, all connectors can be IN or OUT ...)

By placing the first switch "mult. Link "on XY (the dedicated LED lights up), a link is created internallyto combine the first two X & Y slices together.

Thus, the incoming signal at (x) 1 will come out in (x) 2, (x) 3, (y) 1, (y) 2 & (y) 3.

At this point, if I connect a cable in (y) 4, (y) 2 is detached from the multiple and becomesindependent with (y) 4 ... Ditto for (x) 4 with (x) 2 ...

Finally, if my second switch "mult. Link "is placed on YZ (the dedicated LED lights up), we can get amaximum of 8 multiples of the signal following the same logic ...

This may seem confusing but by experimenting, you will quickly apprehend this section. Here again,the possible combinations are very numerous. For example, you can dedicate the Y slice to a « mini-multiple » and use the first two slices patchbay, etc ...

Example of using the multiple

Slice X: single multiple 1 IN to 2 OUT

...by activating the XY selector, the multiple offers 1 IN to 5 OUT (the xy LED lights toindicate the connection between the two X & Y slices)...

...and by activating the YZ selector, the multiple offers 1 IN to 8 OUT (the LEDs xy & yzlight up to indicate the connections).

Warning, the multiple being passive, for v/o signals, it is better to be limited to 1 IN to 2OUT to keep a good tracking... And again, each slice being independent, be imaginative

2X signal A

Signal A

Signal A

5X signal A

Signal A

8X signal A

Alternative

Remember that by connecting a cable in 4, 2 & 4 separate from the multiple.

...etc...

1X signal A

Signal A

Signal A

4X signal A

Characteristics

Size 7hp (3,55 cm), epoxy black panel 1,6 mm.

Deep : 25mm with connector.

PCB in epoxy FR4 dual layer, 1,6 mm. Surface finish HASL.

Ribbon cable, M3 and nylon nuts inc.

Consumption : ~9 mA (+12V) / ~0 mA (-12V)

Components tested and assembled by hand, in Brittany, France.

thank you for your trustFeel free to give me your opinion, criticism or wishes ...

Other modules are coming

mail : phneutre56@gmail.com

__________________________ http://ph.neutre.free.fr __________________________

ph Neutre © 2018