Uv led pcb exposure scanner software

Diy pcb photoresist uv led exposure module youtube. How do we also determine if the resulting exposed board that failed is overexposed or underexposed like this. I used a scanner that is about 4 inches deep and it works really well. When you cut the led strips, make sure it is between the two copper points about every three leds.

The system provides instant start exposure no down time, variable intensity uv leds and 0100% adjustable output. In the previous blog i have made an uv led light exposure box from an old scanner unit. The scanner had an indicator and a light guide and i wanted to make use of them. Ultraviolet light source uv 80 for pcb exposure scienceprog 27 april, 2006 24 february, 2019 pcb technology, projects one of more advanced pcb manufacturing methods is exposing laminate copper boards covered by photo resistive layer through mask.

Compared to most of the other scanner mods, which use led arrays or. Uv led screen exposure scanning bar sunlite science and. The guy decided to make uv pcb exposure box made of uv light led s. This uv exposure unit can produce a double side pcb, and the circuit quality is good. Commercial pcb exposure light boxes usually employ gas discharge tubes as an ultraviolet uv light source, these devices are however bulky, fragile and costly. Diyoupcb is an open source pcb etching project consisting of both hardware and software components. A uv exposure box is an extremely useful piece of kit. In this project well use an old scanner as a box to create a pcb uv exposure box. I went to add some more lights to the unit this week and noticed that the lights, which have a plastic waterproof coating over them had yellowed and that the new lights which were the sa. This instructable is to accompany a demonstration to be given to ipswich uk makerspace in may 2014, but might be of interest to any wouldbe pcb producers, particularly based in the uk due to the sourcing of materials. The second was a pic 16f628 based 45 uv leds, in a custom made box.

The countdown timer is custom made using attiny23 ucontroller. Openexposer is a low cost and easy to usebuild laser exposing unit suitable for many different applications. Im using an old and damaged scanner box to create this device. Films were scanned as 48 bit rgb tiff images at 150 dpi using an epson perfection v700 photo flatbed scanner. In the past years i always had some diy electronics related projects, which i tried to make somehow at home. How to make a printed circuit board pcb using the uv light led method this instructable shows how to create well done pcbs using ultraviolet light. Turn a flatbed scanner into a pcb uv exposure device. In this project ill introduce my homemade uv exposure unit for pcbs production. This project is an exposure timer for diy pcb making for a home made ultraviolet light exposure box. But to begin and do the experiments with the uv light timing, we first need a uv exposure box to expose the pcbs. Our systems integrate the most effective uv leds available on the market together with highgrade microlens arrays. A led uv box has a clear advantage over a tube one.

Timer for uv led pcb exposure box project gallery picaxe. Heat is an issue with leds most of them are only 50%80% efficient. Exposure machinepcbsolder maskdry filmexposure unitssemi. Sunlites uv led screen exposure scanning bar has two major benefits. They are used to expose a presensititised blank circuit board. With the ability to repeatedly perform entire exposure sequences at the touch of a single button, helios is the ultimate largeformat exposure system. In the back of the lid part there is a red indicator led that is on whenever the uv leds are on. It can expose singlesided sensitised copper clad boards up to x20cm and has an adjustable exposure timer from 1 to 10 minutes. As many people do, i started to assemble my projects on cheap prototype boards. Old scanner finds new life in diy pcb fab hackaday. This way i was able to find a compromise between led density spacing, distance between leds and board and cost. The first was a converted flatbed scanner, with too many fails and faults, but at that time, it got the job done.

Feb 25, 2011 i dont know what the ideal wavelength for uv exposure of photo pcb s is, but about a year ago, i made myself a pcb exposure box from an old canon scanner that was no longer useful casualty of moving up to windows 7 os. Oct 31, 2006 you can see a pcb made with this insolator box with 6 minutes of exposure. I had an old a4letter size scanner that was no longer producing sharp scans. Pcb exposure timer with picaxe microcontroller and lcd. This project shows the creation of a large array of uv leds.

Uv led pcb exposure box october 29, 20 tools diy pcb, led jari majaniemi one of the major hurdles when making printed circuit boards at home is to solve how to transfer the pcb design to a copper clad board so that the extra copper can then be etched away. Uv exposure units uv exposure lights or units are devices that give out uv light at concentrate levels. My uv led exposure box uv ultra violet light box a convenient equipment intended for printed circuit boards manufacturing at home. Uv led exposure box for printed circuit boards etching and design.

Powered by a pic 18f2221 in the video the speed of exposure is increased for show purpose in reality it is moving very slowly. This system is energy efficient for reduced operation costs and uses high quality uv leds with a 10,000 hour led life. A big area of crappy uvled s takes longer while beeing more expensive. Jan 12, 2018 plenty of diy pcb uv exposure tool building posts are available on the internet with total different approaches.

For small pcbs, two or four 8 watt 12 tubes will be adequate, for larger a3 units, four 15 15 watt tubes are ideal. Uv led lithography for 3d high aspect ratio microstructure patterning jungkwun jk kim, seungjoon paik, florian herrault, mark g. The driver is run from a 12v dc power adapter, with four of the drivers running from a single 12v 1a power supply. Uv exposure unit for pcb production electronics homemade. Exposing pcbs with a home made laser printer hackaday. Plenty of diy pcb uv exposure tool building posts are available on the. Diy 1188 led dual sided uv radiation unit kavionic. Dec 28, 2006 the guy decided to make uv pcb exposure box made of uv light leds. Dec 17, 2017 as the pcb was supposed to be a demo version only, solder mask and silkscreen were not ordered. Mar 10, 2011 when i made my uv led box, i added a pic to control the time. Nov 25, 2017 im using an older scanner as a box to create a uv pcb exposure box. The set time is saved in eeprom and used as the next default value.

This is a description of how i designed and built my uv exposure box. Because software allows flexibility in connecting the display, i chose to make the. Encased uv bulbs lay underneath clear glass or plastic and emit rays of uv light which is typically a purple light. Uv exposure units can easily be made using standard fluorescent lamp ballasts and uv tubes. May 07, 2017 i have not done the control logic nor the uv led board, but ive made the pcb model for the uv panel, and it will be a 7. Jan 27, 2016 update i made this box about a year ago and after 1 years use, i am not sure i would still recommend doing this. Led based uv exposure box for pcbs all about circuits. A uv pcbeprom exposure box made from an old flatbed scanner. Ultra violet led exposure unit making printed circuit boards pcbs is a fairly simple process if you have the correct tools, however by far the most expensive item that is required is the ultra violet uv exposure unit and even a small basic unit can very expensive to buy. We will have to turn on and off a uv light led strip by counting down using a timer. Well, i meant what sort of software did you plug the numbers into. Are these the right uv tubes for pcb dry film photoresist exposure. Pcb exposure using uv light led box do it easy with scienceprog. Assuming that one uv tube would take about 6w while one uv led would take about 20max3.

Ill go through all steps of the hardware and software design emphasizing more to software logic. Id like to buy or build a uv exposure unit for the photoresist method of making my own pcbs. All the supplies can be bought from frys electronics, ace ha. Sapa responded to this article with an example of his creative pcb exposure system made from an old computer scanner. Printed circuit board production using uv nail curing lamp.

Cant believe how expensive prebuilt units can be but atleast it is not that hard or expensive to build your own. Exposure time in my case for the size of an euro card is well under one minute. Ultra violet led exposure unit making printed circuit boards pcb s is a fairly simple process if you have the correct tools, however by far the most expensive item that is required is the ultra violet uv exposure unit and even a small basic unit can very expensive to buy. Are these the right uv tubes for pcb dry film photoresist. Uln2003a ic as a stepper driver in fact this is a npn darlington array. I would have been happy if i could make this board with the pcb uv exposure scanner itself, but at least, this way i was saved from the board outline cutting which could be challenging at home for the given outline structure. Im using an older scanner as a box to create a uv pcb exposure box. It can also be used to make other things such as intricate photo etched. Apr 27, 2006 ultraviolet light source uv 80 for pcb exposure scienceprog 27 april, 2006 24 february, 2019 pcb technology, projects one of more advanced pcb manufacturing methods is exposing laminate copper boards covered by photo resistive layer through mask. The next thing to do is a timer with lcd,4 buttons and pwm intensity uv control for dont flame some strange pcbs. The main reason why he used led was the power dissipation and compactness. The application is an adjustable timer that turns on and off a uv led strip. How to make a printed circuit board pcb using the uv. My old and rusty pcb exposure unit gave up so i had to build a new one.

Alfredo has translated it to english as well as he could english is not. One could also use a dlp projector and simply project the image as blue channel put in an uv led. I wanted something compact, i dont make large pcbs and those 30cm tubes were not right. Before we begin to design our hardware and software, we first need to create the logic of our device. Oct 16, 2017 most people who have dabbled in the world of electronic construction will be familiar in some form with the process of producing a printed circuit board by exposing a uv sensitive coating through a. The photoresist board needs to be exposed to ultraviolet light through the artwork, using a uv exposure box. For prototyping the breadboards are fine, but as soon as you have to make the next steps to create a stable and final hardware, you should work with pcbs. Nov 25, 2017 but to begin and do the experiments with the uv light timing, we first need a uv exposure box to expose the pcbs. When i made my uv led box, i added a pic to control the time. Uv led pcb exposure system hacked gadgets diy tech blog. Hardware this uv exposure box uses 395nm uv leds instead of the more traditional tubes. I have build uv led lightbox using old flatbed scanner and 40 kingbright l71uvc leds. Ultraviolet light source uv80 for pcb exposure do it easy. The enclosure from older flatbed scanners are almost designed for this very purpose.

In answer to the frequently asked question about how i make my printed circuit boards pcb s i make almost professionally looking pcb s since years, the only thing i cant do by myself is the silkscreen mask. Uv exposure lights or units are devices that give out uv light at concentrate levels. The pcb final result depend also on the etching process. I was thinking of modding a scanner into a uv exposure box, but im not quite there yet. Pcb exposure timer with picaxe microcontroller and lcd display november 28, 20 tools diy pcb, picaxe jari majaniemi quite appropriately, the first board that i exposed with my uv exposure box was a timer to control the exposure. It allows to save a lot of time and achieve very good quality boards. The top part with the bed and lid looked just perfect for the exposure. Diy uv exposure unit for making pcbs stack exchange. Then you could do direct exposure without a transparency. Then one could just use a phone, tablet, or monitor to expose a pcb without needing to hack in a uv light source. This is my home made pcb uvled exposure box housed in an old scanner.

The highintensity uv light emitted provides a faster curing time than traditional lowpower led screen exposure units which require a curing time of approximately one minute for many applications. Uv led exposure box for making pcbs sparkfun electronics. Most of that energy uv tubes dissipate as heat energy. What is the recommended exposure time for presentisized positive photoresist board using uv light, fluorescent light, cfl bulb and will it also work with led light. Druvs exposure system is design for customization and portability in mind.

Pcb exposure using uv light led box do it easy with. How to make a printed circuit board pcb using the uv light led method this instructable shows how to create well done pcb s using ultraviolet light. Allen school of electrical and computer engineering, georgia institute of technology, atlanta, ga, usa. Ill go through all steps of the hardware and software design.

The alignment of the two sheets can be a challenge, but after a few times, i got the hang of it. The top of the primary reflector to capture the energy that normally bounces down onto the lamp. Arduino powered pcb uv exposure tool open electronics. As i stated before we will be exposing the parts that we want to keep, so we will need a negative of the pcb. Flat bed scanners were found as possibly good target. How to make a printed circuit board pcb using the uv light. After experimenting a bit with drylaminate photoresist and liquid uv hardened solder mask i decided to stop trying to improve my toner transfer technique and rather build a proper uv radiation unit for making printed circuit boards. I had seen a thread on another electronics board recommending uv leds from an ebayer who goes by the name giorgio11185.

Ultraviolet light source uv80 for pcb exposure do it. This is the control software and design files for a diy uv pcb exposure box. Like many arduino lovers, once i began creating larger projects i obviously did not want to keep them on a fragile breadboard. Dec 20, 2017 old scanner finds new life in diy pcb fab. Using just 1 or 2 rows of them in an old scanner is actually an efficient and elegant solution. Make a uv pcb exposure box using an old scanner youtube. Each board contains 96 leds and is powered by a 12. It is is taped to a frame that i cut off a cardboard box and reinforced with packaging tape.