johnydest Posted November 9, 2016 Share Posted November 9, 2016 HiIn my opinion focus fader is the best fader out there. It is simple and does what I need, it cuts without any unnecessary tension-fade calibrations and other expensive stuff.I try to find out how it worksI am not so good at circuits and i cant read a circuit diagram so i opened my fader and tried to understand and I need your help to tell me if i got it right. So here is the focus faderThis is a drawing I made So the powers comes in at V+ and it brakes to 2 ''paths''. The one powers the 2 opto interrupters and then goes to Ground. The other sends power to VC1 and VC2 which are the channels of the mixer, so when there is power sent the sound is ON but when the opto interrupter is closed there is no power sent so the sound is OFF. Both channels are connected to ground with resistor.Did i get it right? Is this how it works? 5 Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 10, 2016 Share Posted November 10, 2016 Yeah that's basically it. R1 and R4 are current limiting resistors for the LEDs, and R2/R3 are emitter resistors for the phototransistors, which are set up in a common-collector design - https://en.wikipedia.org/wiki/Common_collectorR2/R3 are (presumably) high enough in value so they pretty much cause the transistors to switch on immediately without any linear region.EDIT : although, you said "power" when you really mean "voltage". 2 Quote Link to comment Share on other sites More sharing options...
johnydest Posted November 10, 2016 Author Share Posted November 10, 2016 Thanks rasteri, so if you want to use the fader on other VCA mixer the only requirement is that this mixer has the same Voltage at ''V+'' as the stanton? Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 10, 2016 Share Posted November 10, 2016 Thanks rasteri, so if you want to use the fader on other VCA mixer the only requirement is that this mixer has the same Voltage at ''V+'' as the stanton? Yeah pretty much. It'll depend on the VCA circuit though. Quote Link to comment Share on other sites More sharing options...
indigno80 Posted November 17, 2016 Share Posted November 17, 2016 with a little patience... hehehe 2 Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 17, 2016 Share Posted November 17, 2016 Oh wow, that's really cool. I dunno if you saw my reflective focus fader concept - http://www.digitalvertigo.co.uk/forum/index.php?showtopic=38710&hl=%2Bmini+%2Bfocus+%2Bfader 2 Quote Link to comment Share on other sites More sharing options...
ericuk Posted November 17, 2016 Share Posted November 17, 2016 you guys are nerds. with love eric'the mong'uk 4 Quote Link to comment Share on other sites More sharing options...
indigno80 Posted November 18, 2016 Share Posted November 18, 2016 Oh wow, that's really cool. I dunno if you saw my reflective focus fader concept - http://www.digitalvertigo.co.uk/forum/index.php?showtopic=38710&hl=%2Bmini+%2Bfocus+%2BfaderYeah Master! I'm working on it http://imgur.com/a/o3d6J 1 Quote Link to comment Share on other sites More sharing options...
Focus Posted January 8, 2017 Share Posted January 8, 2017 HiIn my opinion focus fader is the best fader out there. It is simple and does what I need, it cuts without any unnecessary tension-fade calibrations and other expensive stuff.I try to find out how it worksI am not so good at circuits and i cant read a circuit diagram so i opened my fader and tried to understand and I need your help to tell me if i got it right. So here is the focus faderThis is a drawing I made So the powers comes in at V+ and it brakes to 2 ''paths''. The one powers the 2 opto interrupters and then goes to Ground. The other sends power to VC1 and VC2 which are the channels of the mixer, so when there is power sent the sound is ON but when the opto interrupter is closed there is no power sent so the sound is OFF. Both channels are connected to ground with resistor.Did i get it right? Is this how it works? Checking in,2017... It's a minimalist approach. Even now there is no need for anything more complicated with added circuits. Maybe even less complicated since scratching is getting more and more precise. I have smd reflective sensors from the 90's so it's not something that was overlooked,once Stanton was involved there was no need to do anymore work. It was easier to drill holes on the side panels and insert the 2mm IR Leds for me at the time.People forget I wasn't some rich kid that could afford to buy supplies to make circuit boards :-)It's the reason why the FF v1.0 came to exist to begin with, cheap faders were $60 and Alps/Vestax $120. Against all odds it made it to Stanton and they took it to the finish line, the interrupter is what they stayed with. There are no rules, whichever way achieve your result that's valid.Time to add Faders to an FX Box.... 4 Quote Link to comment Share on other sites More sharing options...
indigno80 Posted January 18, 2017 Share Posted January 18, 2017 (edited) I've made another with old vestax xfader....And I know the circuit is horrible hahaha, but works perfectly Edited January 18, 2017 by indigno80 2 Quote Link to comment Share on other sites More sharing options...
Mutis Mayfield Posted January 18, 2017 Share Posted January 18, 2017 @indigno80 Inspiring beauty! (Even the dirty pcb) 1 Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted January 18, 2017 Share Posted January 18, 2017 That is really cool. 2 Quote Link to comment Share on other sites More sharing options...
Djmadhatter Posted January 18, 2017 Share Posted January 18, 2017 haha how the hell did you make that ?whats the process to making a sketchy home made PCB like that ? I'm very interested to know 1 Quote Link to comment Share on other sites More sharing options...
Mutis Mayfield Posted January 18, 2017 Share Posted January 18, 2017 haha how the hell did you make that ?whats the process to making a sketchy home made PCB like that ? I'm very interested to knowThere are lots of tutorials (instructables ie) but if you don't want to search I have some here:https://drive.google.com/open?id=0B4ftWaZ6ARSURmVQaTc3cV9OWU0 I hope it will useful to your first steps. 2 Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted January 18, 2017 Share Posted January 18, 2017 Yeah home-etching PCBs is fun at first but it takes a lot of fiddling to get right, and drilling the holes is a pain in the arse. Especially when China can make you a milled/drilled/soldermasked/silkscreened board for less than a fiver. 3 Quote Link to comment Share on other sites More sharing options...
Mutis Mayfield Posted January 18, 2017 Share Posted January 18, 2017 Yeah home-etching PCBs is fun at first but it takes a lot of fiddling to get right, and drilling the holes is a pain in the arse. Especially when China can make you a milled/drilled/soldermasked/silkscreened board for less than a fiver.Agreed. For simple things is more straightforward protopcb with some led cutten legs as wires... Like:with a little patience... heheheBut as I said these is sexy and mess with etching make it dirrty :V 1 Quote Link to comment Share on other sites More sharing options...
indigno80 Posted January 19, 2017 Share Posted January 19, 2017 haha how the hell did you make that ?whats the process to making a sketchy home made PCB like that ? I'm very interested to know hehehe it's very easy, like Mutis said there are a lots of tutorials. I used : Hydrogenated water 120 volumesDilute hydrochloric acidwaterpermanent markers if you want i would make a video 2 Quote Link to comment Share on other sites More sharing options...
indigno80 Posted January 19, 2017 Share Posted January 19, 2017 (edited) Yeah home-etching PCBs is fun at first but it takes a lot of fiddling to get right, and drilling the holes is a pain in the arse. Especially when China can make you a milled/drilled/soldermasked/silkscreened board for less than a fiver.Agreed. For simple things is more straightforward protopcb with some led cutten legs as wires... Like:with a little patience... heheheBut as I said these is sexy and mess with etching make it dirrty :V I do pcb because the protopcb with holes is very sensitive. When you are long with the soldering iron in the small contacts of the plate, they leap up and shit hehehe.. Edited January 19, 2017 by indigno80 1 Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted January 19, 2017 Share Posted January 19, 2017 I do pcb because the protopcb with holes is very sensitive. When you are long with the soldering iron in the small contacts of the plate, they leap up and shit hehehe.. Your soldering iron is too hot then 4 Quote Link to comment Share on other sites More sharing options...
indigno80 Posted January 19, 2017 Share Posted January 19, 2017 I do pcb because the protopcb with holes is very sensitive. When you are long with the soldering iron in the small contacts of the plate, they leap up and shit hehehe..Your soldering iron is too hot then My iron soldering it's too old hehehe doesn't carry a temperature control.... JBC 30S 1 Quote Link to comment Share on other sites More sharing options...
indigno80 Posted February 16, 2017 Share Posted February 16, 2017 I've made that metal piece to improve the cut, more strong now hehehe 1 Quote Link to comment Share on other sites More sharing options...
evil98 Posted February 21, 2017 Share Posted February 21, 2017 I started messing around with my focus fader but im not even sure if it is a working fader or not. I gave V+ 5v, metered both VC and I get 5v no matter if there is something blocking the interrupter or not. Is there anyway to check if the interrupters are bad? Quote Link to comment Share on other sites More sharing options...
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