Really universal soldering controller

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Re: Really universal soldering controller

Postby Evgeny1 » Tue Jul 24, 2018 5:41 pm

Good afternoon!
Is this the schedule from my soldering station? Is it OK?
it is a temperature of 290 degrees
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Re: Really universal soldering controller

Postby kircoff » Wed Jul 25, 2018 4:27 am

i have check calibration 998 and adc 480 490 . on my opinion the problem is firmware iron
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Re: Really universal soldering controller

Postby polaris » Sat Aug 04, 2018 4:24 am

If anybody is selling assembled PCB, write me a PM.
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Re: Really universal soldering controller

Postby Evgeny1 » Wed Aug 08, 2018 3:04 pm

so how's with my schedule? this is normal?
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Re: Really universal soldering controller

Postby minkok » Tue Aug 14, 2018 11:52 pm

Evgeny1 wrote:so how's with my schedule? this is normal?


Look at that, if it can be in help for you.
https://www.youtube.com/watch?v=erKCA71q7cg
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Re: Really universal soldering controller

Postby heuboda » Thu Aug 30, 2018 1:50 am

Dear sparkybg,

what a great job! Thank you for your engineering and your support over such a long time.
Also thank you to everybody who was so kind to help and keep the UniSolder 5.2 alive.

Now its time for me to build one. The reason for that is, that I dont want to buy two JBC stations for my T245 and T470.
Because the resistance of the T245 cartridges are about 2-3 Ohms and the restitance of the T470 cartridges are about 7 Ohms, I cant use just only one JBC station.

The T245 uses about 24V and the T470 uses about 40V. So I cant use the T245 with the HD JBC stations (I get an error). I am able to use the T470 with the JBC compact stations, but not with full power.

I have read all 133 pages and I know that some of you write that to use the T470 with the Unisolder 5.2 is not possible because of the 6A limit of the Unisolder electronic.

So here is my question. The Unisolder electronic should have no problem with hte T470 because the resistance of the cartridges are higher and it should never come to the 6A limit.

Is it possible (with modifications) to use a source with 40V with a current limit of 6A. So it should be possible to use the T245 and the T470? Unfortunate this source cant be a transformer ...

Thank you ...
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Re: Really universal soldering controller

Postby omegascion » Tue Sep 04, 2018 9:44 am

So I haven't seen it explained anywhere, does anybody know why sparky uses a NPN to control a PNP to control the P-channel mosfet? Why not just use the NPN to control the gate of the P-channel? The NPN has a Vce of 160V, so it won't breakdown when not conducting.
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Re: Really universal soldering controller

Postby afedorov » Wed Sep 05, 2018 9:16 am

omegascion wrote:So I haven't seen it explained anywhere, does anybody know why sparky uses a NPN to control a PNP to control the P-channel mosfet?

It is done to limit Vgs.max. while having low gate resistance for faster switch on.
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Re: Really universal soldering controller

Postby omegascion » Wed Sep 05, 2018 12:18 pm

afedorov wrote:It is done to limit Vgs.max. while having low gate resistance for faster switch on.


Doesn't the 15V zener limit Vgs?
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Re: Really universal soldering controller

Postby minkok » Thu Sep 06, 2018 12:56 am

omegascion wrote:So I haven't seen it explained anywhere, does anybody know why sparky uses a NPN to control a PNP to control the P-channel mosfet? Why not just use the NPN to control the gate of the P-channel? The NPN has a Vce of 160V, so it won't breakdown when not conducting.

ZD7 and Q9 are in one circuit - to limit proper way Vgs
and you get better stability of switching of the mosfet, less noise, faster on and less heating of the mosfet.
Last edited by minkok on Mon Sep 10, 2018 11:49 pm, edited 1 time in total.
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Re: Really universal soldering controller

Postby afedorov » Thu Sep 06, 2018 8:58 am

omegascion wrote:Doesn't the 15V zener limit Vgs?

It offsets PNP transistor base, so the transistor is in saturation region until voltage on its emitter reaches (Vin-14.3) due to pull-down by NPN transistor, limiting Vgs at about -14.3V. As long as PNP is saturated, it's collector current is limited mostly by the 150 Ω resistor. If using the sole zener maximum allowed gate current would be ten times smaller.
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Re: Really universal soldering controller

Postby gftstf » Sat Sep 15, 2018 11:56 am

Hi everyone!

Yet another electronics newb hobbyist trying to assemble UniSolder here as an upgrade to my TS100. So far completed the power PCB, but facing shortages on IRLML2502 and IRLML6401 to complete the logic board. Ordered most of the stuff from Mouser and Farnell, but those mosfets are seemingly out of stock everywhere.

Except well ... eBay. Plenty of $1/10pcs listings there from Chinese sellers, which look dodgy to say the least. Ordered one pack of IRLML2502-s, but the markings on them cannot be found in any IRLML2502 datasheets by any manufacturer (says NO25P on the case, but should start with either G or 1G). I normally don't have a problem with Chinese spinoffs having different markings, as long as they're electrically equivalent, but the seller sent me the same PDF by IR that proves my concern over whether this is IRLML2502, or even a mosfet at all (according to one SMD codebook this may in fact be a low-power npn). Wouldn't want to ruin a $50 worth of components with a $1 worth of counterfeit sh*t.

So my question - has anyone used an alternative to IRLML2502 and IRLML6401? Or at least had some positive eBay experience?

INB4: searched this forum with "IRLML2502" keyword to find nothing, looked at Unisolder notes by 5N44P, nothing there except that one of those is to be left unpopulated
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Re: Really universal soldering controller

Postby Tony » Sat Sep 15, 2018 1:10 pm

Hey gftstf

Q17, Q20 - IRLML2502 do not solder!

Q14, Q15*, Q16, Q18,19,21, Q22 - IRLML6401 = VISHAY SI2315BDS-T1-E3
Q15 - do not solder!
https://www.tme.eu/pl/details/si2315bds ... md/vishay/

Read the unisolder-notes
https://github.com/5N44P/unisolder-notes

This is how UniSolder52 works with VISHAY SI2315BDS-T1-E3. Good luck in building the Uni.

Tony

20180913_170610_A.jpg
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Re: Really universal soldering controller

Postby Tony » Sat Sep 15, 2018 2:18 pm

Hi! gftstf

We do not sold these parts to PCB front
Q20, D17, R29, Q17, Q15, U9, R29 (Ra, Rb, Rc, Rd, Re, Rf, Rg).

Tony

20180915_204100_A.jpg
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Re: Really universal soldering controller

Postby gftstf » Sat Sep 15, 2018 2:50 pm

Thanks, Tony! Those are in stock, will order and try with them. Excellent soldering btw.
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