EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: a1b2c3d4e5 on February 27, 2016, 11:29:19 am
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Hi, Please forgive me if I have posted this in the wrong place, I am looking to find out the type of connector on my new jbc soldering station so I can connect a foot pedal, It has a roughly 10mm diameter thread on the outside to hold it in place and an internal bore that seems to accept and hold a 3.5mm jack type audio plug. I have not checked but assume it only uses two poles as its just a switch. If anyone recognises this I would be grateful, I recognise the other connectors on it as binder brand already discussed on here. Thanks Robin
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Seems like lockable 3.5 mm jack. http://cpc.farnell.com/1/1/14158-pro-signal-psg08275-3-5mm-jack-plug-locking-stereo.html (http://cpc.farnell.com/1/1/14158-pro-signal-psg08275-3-5mm-jack-plug-locking-stereo.html)
You can use a usual jack connector as well.
(http://uk.farnell.com/productimages/large/en_GB/AV17485-40.jpg)
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Hello,
Did you, or can someone, confirm that the pedal is indeed only a switch (so no electronics is inside)? So any other switch will work.
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Nope, definitely not just a button. I have a hot air station from them with one of those ports (edit: JTSE-2A) , and no matter which connection you close, it does nothing.
I get +2.3V ground-tip and +2.3V ground-ring. some weird fuckery going on there.
they're either using some signal to check for an actual pedal, or just a specific resistance value in-line with the switch, idk.
It's be nice to get someone who has such a pedal to tell us what's inside it.
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Bit of a massive thread-bump from the past - but has any ever managed to reverse engineer the JBC foot-pedal?
Even if someone had one, and monitored resistance values when pressed, etc - or similar.
They seem quite highly priced for what should be a simple switch - does anyone have any insights here. Do they actually have more smarts in them than a simple switch?
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Its not an answer but someone has drawn a schematic of a jbc station here:
https://www.eevblog.com/forum/testgear/jbc-soldering-station-cd-2bc-complete-schematic-analysis/ (https://www.eevblog.com/forum/testgear/jbc-soldering-station-cd-2bc-complete-schematic-analysis/)
The sleep signals are pullups that need to be shorted to ground. Its surprising if the foot pedal is using something other than that.
What about opening your station and seeing where the inputs go?
http://www.waveroomplus.com/JBC-P-005-Foot-Pedal_p_9618.html (http://www.waveroomplus.com/JBC-P-005-Foot-Pedal_p_9618.html)
https://www.batronix.com/pdf/JBC/P-005_MANUAL.pdf (https://www.batronix.com/pdf/JBC/P-005_MANUAL.pdf)
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Alas, that schematic is for a model that doesn't support any pedals!
I took apart my electric suction module (which has a pedal port to it) to try an see how the hell this stupid port is wired. Took some pics along the way!
Basically, it's wired to two digital I/O ports on a PIC24HJ256GP206.
so it's either talking to the pedal to identify it as such, and asking it its status (pressed or unpressed), or I'm a jackass who can't even short out three wires together :-//
pics here: https://imgur.com/a/Tw5XiS3
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I guess the only step after that is to wait for someone to loan/buy one and have them take it apart to see what's what.
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Quick update for those still interested in adding a pedal to their setup, one option could be by using the robot control and protocols to control temperature, on/off cycle, etc.
https://www.jbctools.com/jbcsoftware-menu-115.html (https://www.jbctools.com/jbcsoftware-menu-115.html)
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To help update this old thread.... I have a JT6040 hot air station coming to me soon, hopefully this week, and it includes the pedal. If I can help with determining the pedal output to the station, I will.
Watch this space.
Fraser
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Just for information.
My JBC JT6040 arrived today and I can positively confirm that it uses a 2 pin connector for the foot switch and that there is just a closing of contacts to activate the hot air station. Nothing more than a simple normally open switch in the foot pedal. Clearly the more recent models use a different foot pedal system.
Fraser
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Nice! hopefully this can help someone with older gear.
as for those of us stuck with the new ones, we'll keep hoping! |O
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We have a breakthrough!
I figured out the pin-out for the P-005 pedal, and how it works. Kudos to Fraser for bringing me back to this thread.
[attach=1]
Going from previous messages in the thread, we know that the pedal port (on newer stations) is a T.R.S. plug, with ground being on Sleeve, and Tip and Ring go to two separate pins on a micro-controller (in the case of the de-soldering module MSE-A, it's a PIC.)
Looking at the manual for the P-305 pedal module, which includes a P-005 pedal and a module to control a single tool that plugs between the stand and the station, I noticed there's a dip switch in the module to reverse the pedal's effect (like depress pedal to heat tool, instead of press pedal to heat tool). the switch looks like a simple SPDT slider switch, which led me to think that IF the module is just a junction box with no brains, then the rest is in the pedal. Can't lose in trying out stuff right, this thread has been going for five years, so what's a few minutes tinkering....
And if the rest is in the pedal, and there exists a dumb adapter to plug the P-005 pedal in older stations that only require a switch as a pedal (going on the manual for the JT6040 that Fraser got), then the P-005 pedal is just an NC and an NO switch that are ganged up, and the adapter just keeps the NO switch and ignores the NC switch!
And I guessed right! It works both on my JTSE station and my MSE-A extractor (if you're trying this, remember that you have to tell the station that there's a pedal connected.)
I guess the station is constantly looking for two state changes at the same time on the TRS plug. One line is looking for a state change LOW>HIGH on pin T, and the other is looking for a HIGH>LOW state change LOW>HIGH on pin R.
Welp, there you have it folks! Enjoy the pin-out for the pedal! to think I picked this up today trying to find some digital signals for the station to talk to a micro-controller in the pedal on startup... :-DD
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Great news :-+
I am pleased that JBC did not decide to use some over complicated pedal interface.
Fraser
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As am I!
Just goes to show that we get so used to accessories that have brains, that we forget good old switches sometimes :palm:
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Wow, that's pretty awesome.
Now I'm left wondering how they've done the pin-out of the P-305 pedal module.
It connects between the stand and the main unit - which suggests potentially we just have two pin and ground for it as well by the sounds of it?
Has anyone previously figured out the wiring pin-outs for the JBC stand -> main unit wiring? I know lots of people have figured out the handset wiring - but I imagine there wouldn't be much more than that for back to the main unit. Probably just the stuff for the pedal, and then the set-back stuff?
I guess I could buzz-out what's directly from the stand connection passed through to the hand-piece, and then see what pins are leftover?
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I haven't thought about it too too much, but I'm guessing the P-305 module just acts like you putting the soldering iron back in it's stand, so basically taking the soldering iron's outer connection, and shorting it to ground. Ok, bit of a lie, I have thought about it a bunch, and here's a diagram:
[attach=1]
The two connectors on the P-305 module are just wired pin-to-pin since it's just a pass-through, hence why I drew just one.
As for the stand wiring, I heavily suspect that it changes from stand to stand on certain stands, but here's some relevant links:
https://www.eevblog.com/forum/projects/jbc-handle-cartridge-data/msg3580774/#msg3580774 (https://www.eevblog.com/forum/projects/jbc-handle-cartridge-data/msg3580774/#msg3580774)
https://www.eevblog.com/forum/projects/help-with-extension-connector-used-by-jbc-in-equipment-di-1-de-2-dme-4/msg2168515/#msg2168515 (https://www.eevblog.com/forum/projects/help-with-extension-connector-used-by-jbc-in-equipment-di-1-de-2-dme-4/msg2168515/#msg2168515)
https://www.eevblog.com/forum/reviews/jbc-soldering-iron-stand-wiring/ (https://www.eevblog.com/forum/reviews/jbc-soldering-iron-stand-wiring/)
http://adgd.ru/2020/02/16/jbc-ht420-a-teardown/ (http://adgd.ru/2020/02/16/jbc-ht420-a-teardown/)