A Quick Take on Adding 7135 Chips to Increase Output
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- เผยแพร่เมื่อ 16 ต.ค. 2024
- How to add 7135 chips to the 105C / qlite driver to increase power output. Each chip adds between 0.35A to 0.38A of potential output.
To get drivers, chips, and everything else you can think of for your custom flashlight, check out mtnelectronics.com
I apologize for the poor lighting and at times obstructed camera.
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Handy info, thanks! Are 7135 currently still the go to chips for linear drivers? Have there not been more modern versions for this chip? Thanks
Thanks for sharing Richard!
Matt, after watching both you and Richard's video on this process I just have one question. Is soldering the middle leg or the back leg personal preference?
@@krisswift1195 both are for ground negative... i prefer breaking the middle leg because so hard to solder with it there... i just solder from the big outer legs... have done a few 7135*x12 on convoy s2+... but the heat it produce is so useless at high mode..
While I appreciate the endeavor of shooting this instructional video, your lighting arrangement provided a negative impact, because of the white the background on the subject plus the reflection from it by the powerful light from the top. Please do not misunderstand my approach, as my idea was only to provide a report of the effect.
I performed the same, on the driver that had 1 Amp output, to 5 Amp by stacking 7135s. The result was phenomenal, with the emitter throwing about 2500 plus Lumens.
Thanks and have a nice day.
For better control of the soldering tip, switch to a Metcal soldering iron. The design of the soldering handle allows you to hold it closer to the work. All the techs where I worked were issued Metcal Soldering Stations. They are not cheap, but worth it. I was so fortunate when the manufacturing moved to Mexico that I was allowed to keep the system. I am retired now but still use the Metcal for my home projects.
I agree! I have since acquired an FX-951 and the handle is much closer to the iron tip, but old habits die hard and I am still perform this particular operation with this iron. After thousands of operations I can do it with this iron blindfolded, but I do agree that if you were learning the other would be much easier.
I wonder how many recreational hobbyists doing flashlight mods would invest in such a quality station. You can buy at least 12 "Convoy" flashlights for the price of a low-end Metcal. 😁
@@tahnjr Good point, however, I have a feeling people tinkering with flashlights this deeply will find interest in other circuitry or electrical projects before long. Once you have a good station (and learn to use it) it will serve you for a lifetime and the world of electronics opens to you like never before.
@@afrocatpro I'd recommend a basic Weller station station, from your local Fry's Electronics, before investing in a Metcal... But hey, I still use a cheap "RadioShack" station I picked up 30 years ago. 😆
Nice tutorial ~ finally one with someone who actually has soldering skills. What wattage/temp are you using on your iron?
The FX-888D seen in this video is about 60W and I usually have the temperature set at 700F / 370C. Thanks.
@@mountainelectronics1639,, are you using 60/40 or lead free solder?
Neither: 63/37 leaded, but I have done it with lead-free as well; with either, the technique is the same.
@@mountainelectronics1639 I think there is my problem, I have a cheap 25W soldering iron. It takes ages for the bottom solder to melt, if it melts at all. Cold joints everywhere. I just can't do it like this, even after your vid. Guess I should buy a proper one.
I've seen some people back that middle lead off the chip before soldering it on. I noticed you kept all three. Is there a benefit to using either method over the other?
Yes, the middle lead is both the electrical ground connection and the thermal connection. You definitely want to connect it. Some people connect the rear of the tabs instead, which can also work, but can often cause clearance issues without additional sanding of the solder joint.
Well, having equipment like flux, a temperature controllable soldering gun, and a helping hand station and a way to remove solder other than flicking it on the table...makes it a bit easier I would imagine...
Would you be willing to replace the SST-90 in my Olight SR-90? Bought the flashlight 2nd hand and it was already broken, any help would be greatly appreciated. I'd pay you ofcourse.
You make it look easy!
I tried soldering new wires on to the driver in a new build, the flashlight didn't work - haha. The positive was okay but with the negative I wasn't sure if I bridged over to the adjacent 7135 chip but now it looks like they're connected. Everything is so small, I intend at some stage to add more 7135's, haha. I don't think the chisel tip on the soldering iron helps as when you don't orientate it correctly the contact and heat transfer is poor. I'll get there eventually when I've had some practice I hope.
+Andrew wood
Keep practicing and you'll get there. :-) You can also use a chisel tip, but the technique is a little different. It is better to use a tip that is a little big than a tip that is too small.
I'll give it another go using your techniques in the video , thanks Richard.
My v2 convoy driver produces beep sound only on high mode... All other modes of all groups are working fine... But on high mode, it automatically turns to low mode and produce beep sound.... Someone plz tell?.
Can you please tell me about the pin on the ground ring I ordered drivers and chips on back side and bottom seem to be grounded to ground ring but when you solder those on do you not connect the outside pin to the ground??
The center pin is one solid copper piece that goes all the way underneath to the back tab. In other words, they are one and the same.
Thank you soooo much
is there a easy way to add a momentary button to this driver
Yes: there is a version with momentary firmware. Check out the "QLITE Momentary Switch Driver" on the website.
or just get a driver with a high amp mosfet & the 7135 is used as a Voltage regulator like here www.mtnelectronics.com/index.php?route=product/product&path=67_117&product_id=663
those 7135 are only .38 max so 10 is only 3.6-3.8amp mosfets have much more amp capability
I searched mtnelectronics.com and there was no chips to be found. Guessing they do not sell them anymore.
Components --> AMC7135/MOSFET and you will find that we carry two types of 7135s.
www.mtnelectronics.com/index.php?route=product/search&search=amc7135
THANK YOU !! I want to order some to modify some flashlights :-)
Going to do a tear down and verify the room inside, I do appreciate your video and fast reply. Also may I ask the soldering pen you use or suggest, I need to purchase that also.