Building the control electronics for my homemade REAL soldering station
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- Опубликовано: 7 сен 2024
- Happy New Year 2022 everyone!! I'm back earlier than expected, with part 2 of the DIY soldering station! In this episode we're designing and building the analog controller board allowing us to control the temperature of the soldering iron we built in part 1 of this series, including a quick-preheat feature to get the iron up to operating temperature faster!
Naturally I encountered some hurdles along the way, notably the circuit board not working properly when I first tried it, although given my record working with electronics that was absolutely to be expected, LOL!!
Here's the schematic, it's slightly different than in the video, cuz I had forgotten to include a rather insignificant resistor, as well as the part number of a transistor:
drive.google.c...
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As you can see I'm trying to further ramp up video production this year! What would you guys like to watch me build once this series comes to an end?
Just build anything. I'm more into learning HOW to do stuff, not WHAT to do. I can pick that up from whatever you decide to build. Like the details related to the wood handle that you shown (the air gap between the iron and the handle).
Good to have a neutral voice 😆
I also watch _everything_ in my subscription feed for the very same reason, though with the Led lamp video I learned the hard way that if I don't do things in my audience's the realm of interest, the channel simply won't grow...
instead of controlling the after-transformer-voltage, control the before-transformer-voltage.
make an scr circuit that has less than 10 components total.
Hello from Baracoa. Sigo tus trabajos son buenos y quiero seguir aprendiendo contigo. Feliz Noche.
Hi and good luck in th new year.... I've been meaning to ask did or are you currently studying engineering or this is just you learning on your own and tinkering around. lol at the end of the video.... that's why I love watching your channel....
Hi, thank you!
No, I haven't studied engineering, nor am I planning to do it at the moment. I did a couple of related courses in high school, but other than that it's just tinkering and learning as I go, like I've been doing since I was about 7 years old (except now it's more advanced)
Actually, mostly everything I know about engineering I learned on yt :)
Yeah, the end of the video haha I needed to come clean; I find it quite challenging to come up with a meaningful thumbnail for a video halfway through a series, so I built the cardboard placebo, which easily gets clickbaty if it never appears in the video 😂
Nice work brother 👍🏻
Thanks
You have successfully made a Charger prank machine 🤣🤣🤣. Will it charge or will it fry!!??
Yep! 30W fast fry! 😂
@@ChronicMechatronic Insta Fry..... (do you like your phone fried and smoking)
InstaFry 3000 - I should actually call it that way 😂😂
"I'd like ketchup on my smoking fried phone please"
On second thought, I _will_ name it InstaFry just for kicks and giggles, you're OK with me putting our little chat in the video?
@@ChronicMechatronic yeah no problem!
I like that you went all discrete components. I assume that the 5.1 V zener is due to lows not being low enough? For driving your Darlington configuration, you can also consider using a plain voltage divider, so that the lows drop below the ~2V needed to open up your three transistors darlington/
Exactly that's what the zener is for, the switching curve of the AMV looks about like a logistic growth, so the transistor activates way too early (or even all the time). That problem didn't exist with the mosfet because it needs a gate voltage of about 4.5V....
Alternately you could also swap the zener for a whole bunch of 1N4148 type diodes to create a high enough forward voltage.
A voltage divider instead would be interesting, I should try that, thanks!
@@ChronicMechatronic If you do go for a voltage divider, consider one that reduces the voltage by a factor of 4. This way, your Darlington will open only when the AMV output goes above 8V, and hopefully that will filter out most of the slow voltage increase. Dunno - 33k paired with a 10k?
I'll try it, I'm thinking about doing a follow up on the original pwm controller anyway. Though tbh, a problem I think might arise with a voltage divider, is that it drains part of the base current needed to switch the darlington. There is only so much current I can draw from a single side of the AMV without throwing it off balance, so R1 of the voltage divider would have to be 100k or at least very close - only experimentation will show I guess... But thanks for the suggestion, I'll definitely see if I can make it work! Eliminating all the "exotic" components in the circuit would be awesome.
@@ChronicMechatronic I should work - your AMV has like a 1K collector resistor, so the collector current would be around 10mA. That divider (approx 40k total) will drain 0.3mA - 30 times less than the current collector for the AMV.
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Now, I see that you already have a 100k resistor - just short out the diode, then add a 33k resistor between the end of the 100k resistor (R10) to ground.
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As for the base current needed, assuming a gain of 50 for each of the three transistors, the gain of your Darlington would be 125 000. To reach 3A for the final transistor, you'd need less than 30nA. Compared to the current through the divider, it's nothing.
I had some spare time so I tried it and it works! Used different resistor values tho, to make it run on 5V (voltage divider 47K+22K) just a rough proof of concept for now so it still need to be refined, but here's a short so you can see for yourself!
ruclips.net/user/shortsGWUq3R8qHAk
The white LED is simulating the load, and flashes simultaneously with left one of the red LEDs, which is exactly what it should look like :)
Thanks again for the suggestion, I love it when things can be simplified to less fancy, or overall fewer components!
That is so cool :) I almost understand the full circuit. But Im not quite sure how the first part works thats making "stable"? 12V. Could someone explain :D ?
It's basically a transistor regulator like this one (electronicspost.com/wp-content/uploads/2015/09/1.-Series-Feedback-Voltage-Regulator.png) with a transistor each added in a darlington configuration for higher gain :)
I guess the schematic layout does make it look a bit confusing...
@@ChronicMechatronic ahh thank you. So basically the zener diode at the base limits the voltage. I'll have to build it myself to fully get it I guess :).
@@MattFixesStuff completely overlooked the zener in that one, but yes, that's what usually serves as a reference. Mine doesn't have that zener, no idea if that was intentional at the time or not, but it kinda works anyway.. (neither of these simple transistor regulators works particularly well to begin with)
Which is Good for soldering iron tempareture Control ?? AC Fan Regulator Or Single Diod on switch For Half Circle AC , Are they Damages Heating ceramic Coil ??
Someone please advice me .
My iron is Sunshine 936 60w...
18:46 fine, I'll write it down))
Yeah, it's best to keep it in mind when designing electronics 😅
Putting diodes in parallel to increase the amperage is Not a good idea since slight differences in Vf can overload a diode
I did think about that and matched the forward voltage, plus it's only 0.5A per diode anyway, so there's quite a margin
Does it run on 5v?
lol wut =))
Too complecated , Bro Do some easy