This post was last edited by Gravity Platform on 2018-8-1 19:06 DIY&Sharing—GravityShare
Exposure flash is needed in many occasions. Among them, the most used one by electronic production enthusiasts is the exposure of photosensitive plates in the process of homemadePCBplate making. The exposure lamp can use a UV tube or a common LED light board, but the exposure time and intensity required by the photosensitive plate for different exposure lamps will be different. If you also want to use the photosensitive plate method to make a PCB board, then a good DIY exposure lamp may be of great help to you.
So how do you make an exposure flash yourself?
P01 Exposure Flash
Refer to the followingvideoYou can also make an exposure flash that meets your needs:
V01 Production process
Graphics and text↓
1. Preparation
1, Effect diagram
This one made this time
]LED exposure light mainly uses a LEDlight-emitting board+acrylic combination, and is powered by an external 15VDC power supply voltage. Since the LEDlight source is concentrated, sulfuric acid paper or frosted paper is needed to disperse the light, so that a more perfect exposure effect can be achieved. Combined with different external power controllers, the function of exposure light or flash can be realized:
P02 Finished product effect diagram
2、Material preparation
1. 1 LED light-emitting board
2. 1 acrylic shell
3. 1 DC5.0 power interface
4. Wire tools, etc.
P03 LED light-emitting board
P04 Acrylic Shell
2. Design principle
1, principle
Below is the wiring schematic diagram of the originalLED3*43 group design: 366992 P05 LED light board principle diagram LED single LED lamp bead on the light board voltage range is 3.0V ~ 3.5V, the power is about 0.5W. The external power supply voltage should be 15V24W or above. Based on the original wiring, a new LED combination is designed as 3*5 as a group, and then 3 groups of them are connected in parallel to meet the power requirements of the external power supply: The redesigned combination: 366993 P06 New design principle diagram
3. DIYProcess sharing
According to the schematic diagram above, first test whether each group of lights can light up normally, and then power on to test whether the brightness is normal. The light divergence effect, the brightness is still good:
P07 LED astigmatism effect
According to the size of the acrylic shell, cut the LEDaluminum substrate so that its size can fit into the shell for the best effect. LEDaluminum substrate is pre-installed into the shell:
P08 Put in the aluminum substrate
The front of the acrylic shell has not yet been torn off the anti-scratch protective film on the surface. A hole is opened on the outside for installing the power socket:
P09 Opening hole
Installing5.0 DCPower socket:
P10 Installing the DC socket
Arrange the LEDs in groups, connect the solder joints with wires, and complete the flying wire soldering: 366998 P11 soldering completed Use hot melt glue to fix the aluminum substrate and the acrylic plate at the bottom (after testing, the temperature generated by the LED working is not enough to cause the hot melt glue to melt): 366999 P12 Glue fixation
Close the acrylic shell to test the effect, tear off the protective film, LEDThe light scattering effect is still quite bright:
P13 Tear off the protective film
Since the acrylic board is completely transparent, LEDThe light is too concentrated, so adding a layer of diffuser film is better. So stick a layer of sulfuric acid paper on the acrylic board to increase the diffuser effect, and add a layer of sulfuric acid paper on the bottom of the acrylic board:
P14 sticker
So far, the exposure light is completed. This is the final effect, simple and convenient, with texture:
P15 completed
4. Appreciation of the finished product
The production is completed. Let’s take a look at the finished product and the effect of turning on the light:
When the light is not turned on, a layer of sulfuric acid paper on the surface blocks the internal structure from being seen. The overall appearance is very simple:
P16 Without light
Connect15Vpower supply, turn on the light, the whole light is bright, the light is evenly divergent, and the exposure effect is good:
P17 Turn on the light
P18 Vertically placed
Stick high temperature tape around the acrylic box for decoration:
P19 Completed
5. Some final words
The exposure light is completed, and the effect is very good. It is very helpful for those who want to use the photographic plate to makePCBDIYin the future. Of course, it can also be used as fill light and flash, etc.
END
This content is created by EEWORLD forum user Universal Gravitation Platform. If you need to reprint or use it for commercial purposes, you must obtain the author's consent and indicate the source
0pt]Power on, turn on the light, the overall light is bright, the light is evenly diffused, and the exposure effect is good:
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