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Microa
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Most of the high power FETs show their Ron at 4.5Vgs and 10Vgs. I am not sure how many Vgs the attiny13A can provide to the FET but obviously under 4.5V. I doubt that the FET can be fully turned on. Low Vgs FET can be fully turned on at 2.5V or even 1.8V.

wight
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I’ve eyeballed the datasheets some more. See below for what I’m currently looking at.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Microa
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That’s fine. Both 70N02 and 70N03 can go through 20A under 3Vgs.

wight
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Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

comfychair
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I haven't caught up yet with the last 100(!) or so posts, but I tried the AOD510 and... the other one, both of them were flaky changing modes using the same known good gate&pulldown resistors as with the Vishay 70N02, so I didn't bother trying to get any current measurements for comparison.

wight
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Huh. Well that’s definitely the most valuable info at this moment.

I wonder where the hangup is. Come to think of it… can you precisely describe the flaky mode changes again?

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

comfychair
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It (both of them, really) acted the same as the early 70N02/17DD weirdness before the gate/pulldown resistors were added. It might just need different values there, but I didn't have time (and, I have like 150 of the 70N02s).

wight
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I figured: I just can’t remember precisely when/where you described the issue so I can’t just go read that.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Rufusbduck
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wight wrote:

Microa, I’m comparing the RDS at the lowest specified VGS. Is there something else I should be considering such as the “Gate Threshold Voltage”?


Gate charge? Doesn’t it have to do with the mcu’s ability to supply the necessary current to the gate at the specified voltage.

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

comfychair
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Sometimes changes mode correctly, sometimes jumps two modes instead of one, sometimes hangs up, sometimes goes into some weird alien-Morse-code thing (dim-bright-BRIGHT!-off-BRIGHT!midlowbright-dim-off... etc.).

Cereal_killer
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Chris are you able to post a short video showing the issue? It sounds like what I have but not sure. Also is this with a clicky or momentary setup that gives you issues (or it doesnt matter, it does it with both randomly)?

The biggest similar issue I’ve had is when I tried to use a stock FET I pulled out of an M6, it cleared up when I swapped it out for a 70N02 however I know the M6 FET’s work when left on their own board but controlled by a ATTiny13A on a piggy backed board, strange…

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

Rufusbduck
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I had similar erratic behavior with both the irlm 2502 and lfpak 56 when using them without the gate resistor and above a certain current level. The gate resistor resolved this in both cases. It may be something to do with board geometry or who knows what since as far as I’ve heard it varies from board to board or FET to FET.

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

comfychair
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I tested the AOD510 & STD95N2LH5 on a 17DD v2.0, clicky switch (added to the side of my test battery box), single tame ICR 18650, test LED was triple XPG2 (parallel) on a CPU heatsink. I only tried them as drop-in replacements for the 70N02, so same 130/12k resistors, didn't try either FET without the resistors.

On paper, the AOD510 should be better at everything. Lower Rds(on), lower total gate charge, etc. Don't know why it wouldn't cooperate. I still have them, I may get back to it when I have some spare time.

Cereal_killer
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Are you guys noticed how fast OSHPark has gotten these past few weeks? I don’t know it they were just going slow cause of makers fair and now that’s over or what happened but I’ve got shipping notices for boards I ordered just 8 days ago, used to it was 14+ days.

Doubt anyone from OSHPark is reading this thread or anything but if they happen to see this thanks for the hustle lately!

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

Helios-
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I created a driver for Roche F6 or Roche X3 if anyone would like it. 70N02 mosfet DD side switch. I would just prefer someone took it for a spin before I posting it in general.


Counterfeit 18650s, 2,<a href=“http://

Cereal_killer
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Since 70N02’s aren’t current avaliable on eBay what’s the next best option from a US based seller?

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

wight
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Cereal_killer wrote:
Since 70N02’s aren’t current avaliable on eBay what’s the next best option from a US based seller?

See post #853
I suspect that nobody who needs to build drivers and has the capacity to determine what will work well has run into this yet. Many of us have some 70N02 stockpiled for now, so no need to buy more FETs and test them… comfychair went as far as to do a quick test and the driver failed to operate properly with other candidates.

Possibly adjusting the gate pull up/down resistors will solve the problem with AOD510, if so then it looks like a good choice.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Rufusbduck
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70N02 FET’s come up whenever I do an eBay search.

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

djozz
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I made a 3xAA in series battery-holder, using the Oshpark boards mentioned in the OP, and did some tests on it, thread here:

http://budgetlightforum.com/node/31889#new

WarHawk-AVG
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Cereal_killer wrote:
Are you guys noticed how fast OSHPark has gotten these past few weeks? I don’t know it they were just going slow cause of makers fair and now that’s over or what happened but I’ve got shipping notices for boards I ordered just 8 days ago, used to it was 14+ days.

Doubt anyone from OSHPark is reading this thread or anything but if they happen to see this thanks for the hustle lately!


Any board I buy, the next day they are on the production board and sent to fab within a day or two…they are probably soon going to get backlogged and/or going to have to make several production runs a day or something

Good for us…they keep pumping out the purple board goodness Big Smile

Just ordered 3x BLF SRK XP-G2 3 channel boards” I special built for my 3*XP-G2 SRK rebuild
(going to try to make the SRK into a semi-thrower and push XP-G2’s a little harder than 1500mA per channel but wanted independent channels to prevent thermal runaway (just in case)
[Huge thanks to Mattaus for pulling my head out of my butt and pretty much designing the board, I just cleaned it up a teeny bit)

wight
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Rufusbduck wrote:
70N02 FET’s come up whenever I do an eBay search.

None in the USA though. I assume Cereal is getting tired of sitting on however many SRKs he’s got now and wants them modded up and out the door Silly

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

comfychair
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Just because it's called a '70N02' doesn't mean it'll have the same specs and work in the same way as the Vishay 70N02. Even Vishay's own replacement for the discontinued 70N02 has wildly different specs.

wight
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I’ve started work on a QX5241 based 17mm driver. http://budgetlightforum.com/node/31906

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Rufusbduck
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Bump for RMM. Rich has boards for us now. Smile

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

Rufusbduck
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Hey guys, gals, and any who are mixed or unsure, I’ve updated the op with some new links but I’ve noticed some links to other Oshpark projects in a few other threads and don’t know whether I should add them. I might miss them if they aren’t posted here so if you want them listed then let me know either by pm or posting here.

Thanks, RBD

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

Cereal_killer
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Just an FYI WarHawk and I are both using his SK68 boards without issue, of course clear it with him but these ar no longer “untested” and again only my opinion but are ready for use.

ETA: one more thing, both WH and wright have made some pretty useful contact boards for me which I’m already using both of, a 26mm contact board and a 22mm adapter ring (the adapter ring is a really useful / wide application piece). 26mm is the size for both the TR-3T6 and 9XT6. I am using wright’s adapter ring in stock forum for a 22mm pill w/ 17mm driver but with a little sanding it’ll fit several size pills and / or drivers.

Thread here-
http://budgetlightforum.com/node/31697

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

wight
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Thanks for bringing that up Cereal_killer, I’d already forgotten to tell RBD about those adapters. Can you tell us specifically which ones adapter rings you’ve received? Do they look exactly like the previews? Do you mind posting pics / measurements in your request thread? I want to make sure the toolpaths were followed as they were in the Gerbers.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Rufusbduck
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Off to work on a Saturday. I’ll post the links in the op this evening.

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

WarHawk-AVG
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Cereal_killer wrote:
Just an FYI WarHawk and I are both using his SK68 boards without issue, of course clear it with him but these ar no longer “untested” and again only my opinion but are ready for use.

ETA: one more thing, both WH and wright have made some pretty useful contact boards for me which I’m already using both of, a 26mm contact board and a 22mm adapter ring (the adapter ring is a really useful / wide application piece). 26mm is the size for both the TR-3T6 and 9XT6. I am using wright’s adapter ring in stock forum for a 22mm pill w/ 17mm driver but with a little sanding it’ll fit several size pills and / or drivers.

Thread here-
http://budgetlightforum.com/node/31697


I really like wights open contact ring…very very versatile

Oh and Cereal_killer my SK68 board the first one I built I am not sure either
A. I compiled DrJones luxdrv with ramping only incorrectly [initial compile I didn’t change the “ramping” number to 1…so it would throw off something] or
B. I have bad 7135’s due to the fact it won’t reset, flickers, locks up acts all crazy

I haven’t successfully tested a board completely yet…if you are confident with it…then give the thumbs up on it…I just can’t verify yet…glad it’s working Smile

DB Custom
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Wasn’t it said somewhere that 7135’s won’t go as low? If you go for a real low moon they act up? And also something about the PWM rate? Might check that out as well. Sorry I don’t have more pertinent information, but I am not using anything it pertains to and well, my memory is kept in a minnow bucket with oversized flow holes.

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