That Little Box GpiO BOX USB Manuale utente

www.thatlittlebox.co.uk

The!GpiO!BOX!USB!is!a!user!programmable!MIDI!control!system!designed!for!use!

with!remote!buttons!and!triggers.!!Based!on!the!popular!USB!GO!BOX,!the!GpiO!

BOX! USB!uses! buttons! attached! to! its! 2! XLR! sockets! rather! than! on! board!

controls!to!trigger!MIDI!commands.!!

The!GpiO! BOX!has!2! XLR!connectors!on!

its! front! face.! These! are! inputs! for!

Buttons,!switches!or!any!contact!closure,!

such! as! the! GPIO! output! from! a! mixing!

desk! or! redundant! switch! system.! Each!

XLR! can! be! used! to! connect! up! to! 2!

Controls! or! a! single!illuminated! Control.!!

The! front! panel! also! features! a! 3-

position! slide! switch! used! to! set! the!

operating!mode!of!the!box.!

The! rear! of! the! GpiO! Box! is! the!same! as! that! found! on! the! USB! GO! BOX! and!

features! 2! USB! B! outputs,! allowing! for! simultaneous! control! of! 2! computers.!

There! is! also! a! Power! /Status! LED! Status! LED! that! will! display! the! currently!

selected!mode!of!the!GpiO!BOX!USB.!

USB

USB!1!

USB!2!

Power/Status!LED!

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Modes!

The!GpiO!box!has!3!modes,!the!Modes!are!selected!using!a!3!position!slide!switch!

and! are! only! checked! on! power! up.! Operation! of! the! slide! switch! once! the! box!

has!been!turned!on!will!have!no!immediate!effect.!The!3!modes!are:!!

1. 2-Button!Mode!!!Switch!to!the!LEFT!

2. Button!learn!Mode!!!!Switch!Centre!

3. 4-Button!Mode.!!!Switch!to!the!Right!!

In!2-Button!mode!the!GpiO!BOX!will!accept!a!single!Control!per!XLR.!

This!may!be!illuminated.!!In!this!mode!a!control!should!be!wired!as!

Follows:!

A!MIDI!message!is!fired!when!the!control!line!(pin!2)!is!shorted!to!

ground!!(pin!1)!

It!should!be!notes!that!Pin!3!does!NOT!have!a!resistor!in!line.!When!!

attempting!to!light!an!LED!a!resistor!should!be!added!in!series.!!

If!using!That!Little!Box!“Button!Box”!products!a!resistor!is!included!!

in!the!design.!

2-Button!mode!is!selected!by!positioning!the!slide!switch!to!the!left,!

closest!to!XLR!1+2!when!the!GpiO!BOX!is!powered!up!!

In!4-Button!mode!the!GpiO!BOX!will!accept!up!to!2!controls!per!XLR!.!These!may!

not!be!illuminated.!!In!this!mode!a!Control!should!be!wired!as!Follows:!

A!MIDI!message!is!fired!when!either!control!line!(pin!2!or!3)!is!shorted!to!ground!

(pin!1).!

4-Button!mode!is!selected!by!positioning!the!slide!switch!to!the!right,!closest!to!

XLR!3+4!when!the!GpiO!BOX!is!powered!up!!

Status!LED!!

The! Power/Status! LED! displays! the! currently! selected! mode! and! shows! when!

MIDI!data!is!sent.!In!2-Button!mode!the!LED!will!be!solid!amber!and!will!blink!

red!when!MIDI!data!is!sent.!In!4-Button!mode!the!LED!will!be!solid!red!and!will!

blink!amber!when!MIDI!data!is!sent.!

4-Button!Mode!

Pin!

Function!

Ground!

Control!1!

Control!2!

2-Button!Mode!

Pin!

Function!!

Ground!

Control!

Illumination!!

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Learn!mode!

The!GpiO!BOX!is!fully!user!programmable!and!can!be! configured! to! output!any!

Musical!MIDI!when!any!of!its!4!input!control!lines!are!triggered.!!To!enter!Learn!

mode!position!the!slide!switch!to!the!center!when!powering!up.!!!!

!Programing!!

When!the!GpiO!Box!is!powered!up!in!Learn!Mode!the!Status!LED!on!the!

rear!of!the!unit!will!begin!to!slowly!flash.!This!indicates!that!the!GpiO!box!

is!in!Learn!Mode!and!awaiting!further!instruction.!!

Next! connect!the! control! button! (or! other! control)! you! wish! to! use! and!

press!it.!The!Status!LED!with!stop!flashing!amber!and!go!to!solid!red.!This!

indicates!that!the!GpiO!BOX!has!detected!a!button!press!and!is!awaiting!a!

MIDI!command.!

As!a!safety!feature,!if!no!buttons!are!pressed!the!GpiO!BOX!is!left!in!

learn!mode!for!60!seconds!the!unit!will!exit!learn!mode!and!restart!

to! its! most! recently! selected! button! mode.! This! is! designed! to!

reduce!the!risk!of!an!accidental!mode!change!when!mounted!in!a!

rack!adversely!effecting!operation.!

Once!the!LED!is!solid!red!a!MIDI!command!can!be!send!in!to!either!of!the!

MIDI! ports! on! the! rear! of! the! GpiO! Box.! To! do! this,! simply! connect! the!

GpiO!Box! to! the!Output! of! a!MIDI! device! or!USB! MIDI! interface.! !Once! a!

command! has! been! received! and! stored! the! status! LED! will! return! to!

slowly! flashing.! ! At! this! point! you! can! either! repeat! the! process! with!

another!button,!or!set!the!slide!switch!to!the!desired!mode!(2-Button!or!

4-Button)!and!power!cycle!the!GpiO!Box.!!

Once!programed!the!GpiO!box!will!output!its!new!“Learnt”!commands!in!

both!Button!modes!until!either!reprogramed!or!reset.!

Reset!!

To!reset!the!GpiO!BOX!back!to!its!factory!default!MIDI!!commands!(shown!the!in!

the!table!bellow)!connect!a!button!to!line!3,!and!hold!this!down!while!powering!

up!the!unit!in!learn!mode.!The!status!LED!will!blink!rapidly!to!confirm!reset!and!

the!GpiO!box!will!return!to!its!most!recently!selected!button!mode!

Factory!default!MIDI!commands!!

Input!line!!

Default!MIDI!command!!

Program!change!0!Chan!1!

Program!change!1!Chan!1!

Program!change!2!Chan!1!

Program!change!3!Chan!1!

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Cable!length!!

While!it!is!advisable!to!keep!cable!runs!between!a!control!and!the!GpiO!BOX!as!

short!as!possible!very!long!runs!of!up!to!and!in!excess!of!1Km!are!possible!and!

do!not!adversely!effect!the!GpiO!BOX’s!operation.!!The!GpiO!BOX!has!been!tested!

using! a! button! connected! to! up! 1.5Km! of! cable.! All! tests! have! been! done! using!

high! quality! modern! microphone! cable! and! no! practical! limit! has! been! found!

beyond!witch!the!GpiO!BOX!cases!to!function.!!Despite!this!That!Little!Box!do!not!

guarantee!function!in!cable!runs!exceeding!1Km!as!cable!and!button!quality!can!

vary!greatly.!

If! you! have! any! questions! regarding! your! GpiO! Box! or! would! like! to! talk! to! us!

about!custom!button!boxes!or!custom!GpiO!BOX!features!then!please!get!in!touch!

via!our!website!www.thatlittlebox.co.uk.!

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