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Internals of Focus Fader v1?


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Guest Mike Reezy

wjat do you need to know?

 

Its to opti couplers switches, one on either end (when the prong goes between them, its no sound)

 

And theres 2 or 3 resistors.

 

Its serioussly $1.00 worth of electornics components.

 

If i GET BORed enough ill pull it out of the drawer and draw another picture...

 

2 optic switches,2-3 resistors... thats it....

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Yeah, I've made a schematic based on the pictures of the Focus Fader v1 found in the Mod Squad over at Asisphonics using 2 Sharp Microelectronics GP1S53V photointerrupters and (as far as I can make out from the picture of the solder side of the PCB) 4 resistors and 1 jumper. I can't search because I have less than 10 posts so it'd be great it you could repost those pictures. Thanks!

 

Edit: Also, since there are only solder side pictures of the PCB in the Mod Squad there isn't any way to verify the values of the resistors.

Edited by gnuZ
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Guest Mike Reezy

 

 

 

 

better link me to some dope porn or something for that effort. Serioussly... I had to go over to the desk pull out the fader, unscrew 2, thats right 2 screws... and then exercise my artistic ability?

 

jk

 

nproblem

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Awesome, thanks Mike. For those that want to try to make a Focus Fader from scratch, R1, R2 and R3 are all 1k ohm and R4 is 2.2k ohm. R1 and R3 set the crossfader output impedance of each channel, R2 sets the amount of current for both LEDs, and R4 converts current to voltage for both collectors.

 

Edit: Now about the photointerrupters, they might be Sharp Microelectronics GP1S53V, but I'm not sure as I don't have a Focus Fader.

 

Edit 2: Does anyone know what DC voltage (V+ in the Focus Fader picture) goes to the crossfader in Stanton mixers?

Edited by gnuZ
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Guest Mike Reezy

its the same as Vestax mixers..... (V+)

 

how do you plan on making the slide assembly?

 

I think the best thing you can do is make a hybrid PCV focus fader.

 

Take a vestax fader, remove the circuit board and the contacts, and then mount the FFV.1 PCB in there and mount the photo interrupter on the VEstax slider...

 

Ill do it when I get bored

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Yeah, that's what I was planning to do with my broken SA-3 crossfader, but rather cut most of the PCB out and solder protoboard with the components on to where the existing add-on PCB is. It's a lot of effort, but I like making things like that work.

 

As for the voltage, yeah, I'm sure it's the same as the Vestax mixers, but do you know if it's 5v or 12v or something?

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glad to see a new addition to the site..especially one who like/knows how to mod things..welcome aboard gnuZ.

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gnuZ welcome aboard man, props to u and mike though. I think i'm gonna try and make a FFv1. My FFV2 sucks, decay sucks. I think i might try and use one of my gemini faders , jsut rip everything out and keep the stem rail and box.

 

Edit: Fuck it, Mike how much you want for yours?

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mix you might as well learn how to mod stuff yaself..much more exciting and helps with other stuff as well

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Guest Mike Reezy

You guys think there would be too much play (side 2 side) with the stem of the CF, if I remove the bottom rail and what I squared in red?

 

 

 

If I cant do that, I guess I will just dremel out all of the uneeded plastic/metal off the stem as well as the contact assembly and the PCB and replace with FF V.1 PCB

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  • 2 weeks later...

Here's a nice little update for everyone. I got a package full of parts this morning and after an hour or so of soldering... and my DIY optical crossfader works! It isn't attached to a crossfader body yet, but the electronic part works. Here's a video of me testing it, and here's the PCB:

 

 

The yellow line is a jumper that you can make out in the video. I used Optek Technologies OPB620 optical interrupters for the switches.

 

Also, If anyone has any (physically working) crossfaders they'd like to donate, please PM me. Thanks.

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  • 18 years later...

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