Resin-Curing Light - Everyone With a 3D Printer Needs One
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- Опубликовано: 28 сен 2024
- Update! Note: I made a mistake with the resistor calculation. What you use for V should be Vcc minus the voltage drop of the led. In my case the voltage drop for my led is 3.4 V. So 5 - 3.4V / I = R
How to make a simple DIY resin curing light to get into the hard to reach places of your resin prints.
This uses a simple 405nm uv led, a resistor and a recycled USB cable.
Nice and simple design!
One problem is with your Resistor value. You callulated with the voltage from the power source, not the voltage across the resistor>
The LED "drops" between 3.0 V to 3.8 V, so 3.4 V on average, 5V - 3.4V = 1.6 V across just the resistor.
So with 1.6V @ 20mA, the V/I = R gives... 1.6 V / 0.020 A = 80 ohms.
Just for your reference, currently with your 240 ohm resistor, V/R = I, 1.6V / 240 ohm = 6.66 mA or about 1/3rd the available power.
I'm cursing you in my head right now lol. But you're absolutely right. My head was elsewhere but that's not an excuse. So I have to admit when I'm wrong. I'll update the description and pin your comment. Luckily, I undershot. If it was the other way around, I couldn't let the video stay up in good faith. But I spent way too much time recording and uploading this (surprisingly) so as it is, I'll just append the notes and you'll be at the top of the comments making me look bad, you jerk. Just kidding. And by the way, you did the best possible job of telling someone they're wrong! Thanks for that!
@@a_boy_can_dream I'm also intersted how much better it might work at the higher power!
No problem, we are all learning all the time... Plus I can't remember 10% of what I once knew... sigh...
@@a_boy_can_dream I'd be tempted to actually run off of an unregulated 9V (actually probably only ~8.5V at 20mA) and increase your resistance to a standard 330ohm (20% tolerance), if you want to be really careful.
You could consider using fiber optic wires too, then you can bend it into really award positions!
And that Pickle Rick is awesome! you could turn it into a whistle if you keep the hole!
That is a great idea! Did a quick search and it looks like you need special fiber optics to handle UV (= expensive). But there are sellers on Aliexpress that claim stuff that can handle the wavelength. Would be good to try!
@@a_boy_can_dream No worries! Yeah, if the AliExpress ones work, you'd be able to get them in spaces the size of a pinhole!
so cool that you invented this solution to solve this problem that bothered me for a long time
An easy but really useful project! If i may, from experience making things like these that are some component on the tip of a cable and that's it, i also heatshrink a bit of copper/steel single strand wire or similar in the last 20cm or so. It makes positioning the (in this case) LED way easier, as you cna bend it into shape and it will stay that way.
I've done it with microphones as well for example. The wire gave it a "hook shape" that rested over my ear kind of like the leg on a pair of glasses, and then i could aim it exactly into my mouth. Here it could be aimed so it shines the UV light upwards into the "head" of pickle rick, and it can more directly cure it. That combined with the new resistor value would probably make it the perfect tool!
I turned myself into a resistor Morty!
lol!
This is an awesome and simple idea!!! Love it!!!
Anything it doesn't matter 😄 Seriously, it's a dead simple and useful trick !!
Thats a really cool idea. Nice one. :)
Also, try curing your prints in water. Cut the top off of a 2 litre Coke bottle (or similar clear plastic bottle), put some tap water in it, put the quickly washed print in it then put that in your curing station.
Once you have tried it you won't go back to your old curing method.
This works with non water washable prints.
You're making me think of my high school science class lol. This totally make sense. You really do this with no issues?
@@a_boy_can_dreamMany people say that the oxygen in air inhibits the curing process. Resin isn't affected by the oxygen in water as it is too strongly bonded to hydrogen molecules. Curing in water gives a nice even finish to the part with no stickyness. The water seems to remove left over resin on the print and that is with non water washable resin (haven't tried it with water washable resin).
I have only seen benefits to curing in water. :)
I am a moderator on the Crosslink discord server and have given this advice to quite a few people and no one as reported any problems.
Well, definitely gonna have to try! Thanks.
@@a_boy_can_dreamPerhaps a vid about it? :)
I just watched a video of someone doing colonoscopy on pickle Rick.
Great idea!
great video , thank you.
This is awesome!
I got a uv lazer pointer and use large fibre optic on the end.
send me pickle rick
Okay I want one lmao, I don’t even have a 3D printer! I mean I have one but it’s broken so I don’t
I might just get a resin printer. What do think the value of resin is compared to filament? (ie why should someone purchase a resin printer if they already have a filament printer?)
I went with resin just for the fit and finish. I really hate layer lines. For detail, I think it's awesome. No neeed for sanding and stuff like that. I use the printer mostly for prototyping cases for my projects and it looks crazy professional. You can do bigger prints on FDM and I hear it may be more robust. But with the new resins out there, you can hit them with a hammer and they won't break.
That’s nice
I can’t resist pickle rick! 🎉
I should have gone with “I can’t resist this giveaway!” 😅
hey that looks super useful! do you plug that usb end straight into the printer and get power through that or do you use a wall plug?
You can plug it into any regular USB. I use an old phone charger though.
Where did you find a pack of UV LEDs and a strip of resistors for only a dollar?
Well, in actual part cost. Shipping is still an issue. But if you were already putting in an order on Digikey, you can get an led and a resistor for less than a dollar. But you'd have to piggy-back off shipping from another order. In Osaka, where I'm at, we have a shop where you can buy single items and this would cost like $1.50.
Nice ! but let me suggest another idea that maybe will do better: Do you know those cheap led fiber optics lamps ? (google image it) well you just stick the fibers root which is already glued to a plastic mount. stick it in front of a uv flash light or maybe a low unfocused diode laser (power choices and budget). this way you can stick those fibers in any hole size! plus it will slip out easily without sticking inside while curing ! your setup is quite big for smaller objects maybe. Plus !! you can use it for multiple objects in the same time. here is another trick! if you have long pieces like that pickle, you can sand some of those fiber it will diffuse the light not just from the tip! the lamp is quite cheap! and could make many of these lighting tools! and make the video and shorts and reels and tiktoks LOL good luck !
Yeah, another guy suggested that too. Took a look and UV requires a certain type of fiber optic which are expensive. But Aliexpress claims to offer some in the correct wavelength.
I have the cheap fiber led lamp decoration. I tested with a uv led flash light the light pass through the fibers. maybe with a focusable flash light the will get brighter since the one I have I used is a wide multiple diodes flash light. again I just tested to tell that the uv light passed through the optics@@a_boy_can_dream
can you add a link to the LED's to the description please?
I wanted to add links (I even use affiliate links) but don’t want to recommend something I can’t say is actually quality. Just a tip: if they don’t provide specs, they probably don’t know what they’re selling. They should provide current rating and forward voltage.