Made UV Lamp for Curing UV Solder Mask
UV solder mask is common in mobile & any electronics repair used to insulate open trace or jumper wire. Just apply the UV liquid mask on open wire or trace & put the LED Light over it, UV liquid Mask gets harden in one Minute and the open wire is gets insulated. I ordered UV Mask & tried to do curing using Single 5mm UV LED But I have to use the thing in proper manner. It is my hobby to make things which I can use as per my comfort & under the minimum investment by using things from my junk boxes.
So for this hack I used veroboard type PCB, UV LEDs & old non repairable LED Bulb plastic Body.
Veroboard type PCB Having Rows of trace & General Purpose PCB or Typical zero PCB Having Dots.
First of all I worked on the diagram how to arrange the LED so that I can utilize it proper way without wasting light coverage on targeted area.
In LED Diode you can easily find out +ve & -ve terminal of the LED.
Now I have to arrange the LED on the PCB so that it can cover at list 2 inch diameter. So I cut the PCB in 2 inch diameter.
And as per the designed I started the work. I took 5 Nos. of UV LED & start to solder by arranging it as per the circuit. I arranged the LED for parallel connection so that supplied voltage to each LED remains same.
“Remember to cut the Traces as per requirement if using veroboard type PCB.”
Here I decided to use VEROBAORD Type PCB and not used Zero type because in Zero type PCB Trace pad is easily get damaged while soldering.
I light up the lamp Using 18650 Laptop battery cell. Cell showing 3.2V on meter because it was not charged recently. It light up very well. Then I thought each time it is not possible to use chargeable Battery instead why not put it on USB Charger adaptor easily available in the home.
So just for testing purpose I connected this unit on mobile charging adaptor & it lit very bright and suddenly goes off………………….sometime in hurry we miss the principle. Yes all LEDs are blown off because I have not limit the inrush current to the LED. (Whenever we put LED on higher than its permissible voltage we have to limit inrush current by putting Resistor).
This UV LEDs normal working voltage is 3V and 20mA Current limit. Excess Voltage & current burn out the LED. So I decided to replace all the LED with using 100Ω resistor on each LED. Used on-line LED resistor Calculator which Guide you what value of resistor is required for particular voltage supply.
Diagram with resistor is as follows:
Now added Micro USB Socket on the PCB
By fixing PCB in the LED Bulb Body powered it using Mobile charger adaptor & it lit up perfectly.
I kept the unit “ON” for 30 minutes it works great without heating.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on HIS G31 Desktop Motherboard Repaired
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23 Comments
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Lynn Blakely
April 29, 2022 at 10:54 pm
Good Job, and explanation.
Yogesh Panchal
April 30, 2022 at 3:01 pm
Thanks!Lynn Blakely.
Waleed Rishmawi
April 29, 2022 at 11:10 pm
Thanks man for the information and thanks for sharing. I am going to give it a try and see the outcome
Yogesh Panchal
April 30, 2022 at 3:03 pm
Waleed,
your welcome! & All the best just let us know how it works.
Albert van Bemmelen
April 29, 2022 at 11:41 pm
Using UV leds at home is a very modern new way to new methods. I however still do not see any need for using UV solder masks myself at home. Although I have used UV fluorescent light tubes before to 'delete' already pre-programmed used Eproms with UV light, or to develop new pcb layouts with it.
And of course UV-C LED lights are already known as an effective way to disinfect non-porous surfaces and environments by purifying the air we breathe and the water we drink.
Yogesh Panchal
April 30, 2022 at 3:12 pm
Albert,
This UV Light is made for Curing Solder mask when doing Jumper or repairing trace using open copper wire & very useful while repairing trace beneath IC where this mask hold the jumper wire in place while you solder the IC Pins.
Babu M S
April 30, 2022 at 12:20 am
Very Good idea and innovation.I never used uv solder mask,may please explain the purpose and where we can use the said mask.
Yogesh Panchal
April 30, 2022 at 3:18 pm
Babu M S,
Mostly used in Laptop /Mobile Repair where SMD components are located in very tight space & open trace prone to make short circuit. But you can use it on any electronics Circuit.you can just watch it on the YouTube it will give you better explanation.
ivan rivera
April 30, 2022 at 2:12 am
Buen trabajo y explicación sobre montaje y el correcto suministro de la energia
,mi duda es con la longitud de onda que emiten los LED y su coincidencia con la longitud de onda con la que reacciona el liquido aislante ,que hasta leer este
articulo ,yo no conocía Gracias por publicar
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Good job and explanation on assembly and the correct supply of energy
, my doubt is with the wavelength that the LEDs emit and its coincidence with the wavelength with which the insulating liquid reacts, that until reading this
article, I did not know Thanks for posting
Yogesh Panchal
April 30, 2022 at 3:21 pm
ivan rivera,
UVA spans 320 nm to 395 nm, making it the longest UV wavelength. UVA is used for general UV curing and is responsible for most of the adhesion properties for the UV formulations.
Thanks!
Imoudu.O
April 30, 2022 at 4:30 am
Well outlined and undeŕstood.I was expecting you will show us how to use leds on uv liquid mask on board trace.Well, thanks for sharing
Yogesh Panchal
April 30, 2022 at 3:26 pm
Imoudu.O,
I request you to just watch Youtube Videos Under Banner "How to use UV Solder mask" will give you proper explanation or you can just read my Article on "Multimeter Repaired for unstable reading problem" this will give you brief idea.
Shashi Rajurkar
April 30, 2022 at 8:55 am
Nice idea , and well explain thanks for sharing.
Yogesh Panchal
April 30, 2022 at 3:27 pm
Thanks!Shashi Rajurkar
Parasuraman
April 30, 2022 at 10:05 am
Excellent and very useful article!Very timely too, as I recently purchased a mask! Many thanks!
Yogesh Panchal
April 30, 2022 at 3:28 pm
All the best Sir,
Just Let us know outcome of using UV Solder mask.
Tayo
April 30, 2022 at 10:16 am
Which UV Solder Mask are you guys using these days?
Yogesh Panchal
April 30, 2022 at 3:31 pm
Tayo,
Just Read My article " Multimeter Repaired for unstable reading problem "
Having photo graph of the product.Brand is "Mechanic UV Solder Mask".
Tayo
May 1, 2022 at 4:01 am
Thank you very much for the reference article. Very informative. I have added a tube to my shopping cart!
Anil Kumar V K
May 2, 2022 at 1:26 pm
Exellent job sir
Yogesh Panchal
May 2, 2022 at 11:10 pm
Thanks! Anil Kumar
jai Etwaroo
May 8, 2022 at 8:09 am
Nice job Yog. I'll give it a try.
Yogesh Panchal
May 9, 2022 at 2:45 pm
Thanks!jai Etwaroo