I have the 17mm FET driver from MTN with electronic switch option. The directions say one side of the switch goes to ground and the other to pin 2. Can somebody help me out with this pin 2 location? Is it the pad I have the arrow drawn to? Thanks. I’d hate to burn this driver up.
The easiest place is to connect it to the pads for the OTC
You can even (almost) see that the silkscreen by the OTC says “ESW” for Electronic SWitch.
Ah ha! I see that now. Thanks guys.
We lost power here about an hour ago or I’d be firing up the soldering station. Not really dark yet but the flashlights are ready! :bigsmile:
I just recieved the 0.8mm thick version of this driver. Searched the forum for info on where to connect the eswitch and found this thread. I’m wondering about the same thing as the OP.
But on my driver the switch pad is allready occupied by another component (a resister?)
That’s a capacitor used for clicky firmwares (it’s the OTC). Is it possible that you mistakenly ordered a clicky driver instead of an e-switch driver?
This is the one I ordered:
http://www.international.mtnelectronics.com/index.php?route=product/product&path=67_117&product_id=227
This is my actual order confirmation:
Chose the firmware for e. switch, since that was an option. It there another driver that I should have chosen??
Looks like you chose the correct options. Apparently RMM made a small mistake and installed the cap anyway. It should be fine to remove the OTC and put your eswitch wire there instead. Leaving the cap in place will likely work as well, but I’d remove it.
EDIT: Actually we do not know which mistake was made. Maybe this driver is configured the wrong way (setup as an offtime clicky driver). Before taking anything off of it I’d drop RMM a line and ask how he’d like you to proceed. I was going to recommend letting him know about the mistake anyway because I’m sure he’d like to hear about it.
EDIT: added strike-through based on RMM’s response below.
Thanks. I’ll drop RMM a PM and see what happens. 
I have been leaving the capacitor on the e.switch drivers lately. It is easier to solder wires to the capacitor than it is the pads (I have had quite a few customers rip the pads off) and it also provides some additional noise immunity to inadvertent switches.
You can remove the capacitor if you’d like, but I would leave it on if it were me.
Heh, that makes sense to me.
Wight, do you sell drivers completed?
I don’t, but I appreciate the interest. I build very few.
Just received the mtn DD17 with D4 V2, wanting to confirm where i put e-switch wires.
Do I ground one and solder the other to the “OTC” pads? if it touches both pads is that ok?
Both wires on OTC. One side is ground, inside is the switch pin (pin #2).
can I convert a mechanical switch fet driver to a electronic switch? I have a MTN 17mm driver that I’d like to use
Yes, simply reflash it to a compatible momentary firmware (most that we use are open source; check out ToyKeeper's repository).