megha
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PART 5: YouTube - 405nm Blue ray Violet Laser Burning. Lights a match at 2.5 meters.
PART 4: NIGHTSHOOTING
The human eye catch the color more violet and darker even the sky is clear and with no fog
PART 3: ASSEMBLING / FINISHING
I`ve finished assembling the kit. I`m using it at 170mA @ 140mW (I guess). For the human`s eye, tt`s visibility is similar to my ebay <5mW 532nm of $8.00. I`m using 9V. The beam is visible at night and the dot is just visible in very light colors as white. Impossible to see the dot in a dark surface from 50mts or more. As conclussion, I think that at this power is more a burning laser than a visible laser.
PART 4: NIGHTSHOOTING
The human eye catch the color more violet and darker even the sky is clear and with no fog
PART 3: ASSEMBLING / FINISHING
I`ve finished assembling the kit. I`m using it at 170mA @ 140mW (I guess). For the human`s eye, tt`s visibility is similar to my ebay <5mW 532nm of $8.00. I`m using 9V. The beam is visible at night and the dot is just visible in very light colors as white. Impossible to see the dot in a dark surface from 50mts or more. As conclussion, I think that at this power is more a burning laser than a visible laser.
PART 2 (The KIT)
The laser kit has arrived in just 8 days from geareb´s hands in korea to my house in Argentine. It`s a SF AW210 405nm Diode. This are some pics and a video about the unassembled kit (I`ll assemble it on this weekedn or next week). I want to have it ready for Chiristmas, So I`ve time to wait the host and batteries from ebay. I`ll assemble
I`ll finally use 3xCR123A (3.0V each, 9.0V total) or maybe just 6.0V power supply. I`ve to check it while I assemble it. I`ll use it at 170mA to have about 175mW. I want a long life, and these diodes are not very stable, they can die if they are not the good ones and you push them. They are factory powered at 125mA.
I`ll finally use 3xCR123A (3.0V each, 9.0V total) or maybe just 6.0V power supply. I`ve to check it while I assemble it. I`ll use it at 170mA to have about 175mW. I want a long life, and these diodes are not very stable, they can die if they are not the good ones and you push them. They are factory powered at 125mA.
PART 1
I`ll bough a laser kit from an ebay seller from Korea called "geareb".
This is the info that the seller posts:
This is the info that the seller posts:
250mW+ 405nm Blue Violet Laser Diode Module with Adjustable Glass Lens, Tiny Heatsink for Laser module and 9 Component Driver DIY Kit include tiny heatsink for laser diode housing.
Ship after 200mA inspection for not stress diode.
Ship after 200mA inspection for not stress diode.
Laser diodes are rated for Class IIIb 250mW @405-410nm CW extract from never used Blu-Ray RW Pickup.
This diode died after 414mW@350mA 10mA step I-P-V test - room temperature with glass lens after install tiny heatsink.
This module include tiny heatsink (glass lens not included). (I`ve bought a total of 2 tiny heatsinks, each extra is $5.00)
Max Output : With tiny heat sink (200mW @ 190mA, 250mW@ 230mA, 300mW@ 270mA, 350mW@ 300mA, 414mW@ 350mA)
I recommand less than 1 minute duty for 250-300mW drive (eventhough
it's arrive 40 minutes continuous work with a tiny heatsink) and 2:40 with 2 tiny heatsink at 250mW.
Or this module need more heatsink than a tiny heatsink for continuous work.
Recommended Output : 200mW@ 190mA(tiny heatsink)
Threshold Current : ~33mA(~3.6V)
Operation Voltage : ~5.1V @ 190mA
Module : 12mm diameter x 30mm length with glass lens
Lead wire 30cm(Red plus[+], Black minus[-]) with 2.5mm pitch Connector.
DIY Kit : 9 component, 320mA max limit
I recommand less than 1 minute duty for 250-300mW drive (eventhough
it's arrive 40 minutes continuous work with a tiny heatsink) and 2:40 with 2 tiny heatsink at 250mW.
Or this module need more heatsink than a tiny heatsink for continuous work.
Recommended Output : 200mW@ 190mA(tiny heatsink)
Threshold Current : ~33mA(~3.6V)
Operation Voltage : ~5.1V @ 190mA
Module : 12mm diameter x 30mm length with glass lens
Lead wire 30cm(Red plus[+], Black minus[-]) with 2.5mm pitch Connector.
DIY Kit : 9 component, 320mA max limit
*****************************************************
Then, I`ve found this for another laser module that he sells (listed as "150mw" but suggested use at 104mw). Maybe this info helps with something because is VERY a similar kit.
Dropdown Reg. Constant Current LD Driver
Input Voltage 8 - 20V
Input Voltage 8 - 20V
Pic 1) Schematic
Pic 2) Components
Pic 3) PCB Layout
From Left to Right : PCB, 0.1uF Cap.(C2), LM317(U1), R1, 100 Ohm Res.(R2),
100 Ohm Pot.(R3), C1, D1, 47uF Al Cap.(C3), R4
100 Ohm Pot.(R3), C1, D1, 47uF Al Cap.(C3), R4
1. Solder all component according to schematic - please be careful for C3 capacitor direction(short leg mean minus).
2. Check all soldered part and pin to pin connection carefully(must secure).
3. Connect ohm meter lead to "a" and "b" point.
4. Adjust multiturn potentiometer(R3) to your need resistor value - I recommand more than 12 ohm (clock wise turn will increase resistance and decrease current).
5. Discharge capacitor C3 - Charged energy can break diode immediately(It can prevent by install R4 risistor).
6. Connect LD to LD connector +/- before power ON, if connect LD after power ON, LD will die immediately.
7. Connect 8 to 20V power source to PWR connector +/-.
2. Check all soldered part and pin to pin connection carefully(must secure).
3. Connect ohm meter lead to "a" and "b" point.
4. Adjust multiturn potentiometer(R3) to your need resistor value - I recommand more than 12 ohm (clock wise turn will increase resistance and decrease current).
5. Discharge capacitor C3 - Charged energy can break diode immediately(It can prevent by install R4 risistor).
6. Connect LD to LD connector +/- before power ON, if connect LD after power ON, LD will die immediately.
7. Connect 8 to 20V power source to PWR connector +/-.
ex)
Output Current 104mA(a to b resistance 12 ohm).
Output Current 104mA(a to b resistance 12 ohm).
I = 1.25/R
where I = Current, R = Resistance,
LD Module Must connect before power ON, if not the voltage will over LD limit(immediately die).
More than 110 mA can kill your diode shortly by heat - Max current limit circuit not included.
For use more current must consider U1 and R3 heat.
where I = Current, R = Resistance,
LD Module Must connect before power ON, if not the voltage will over LD limit(immediately die).
More than 110 mA can kill your diode shortly by heat - Max current limit circuit not included.
For use more current must consider U1 and R3 heat.
150mw ASSEMBLED KIT VIDEO:
YouTube - DIY 150 mW blu ray laser pointer (uncollimated) (REMEMBER THAT THIS KIT IS THE 150MW -104mw is recommended- AND MINES WILL BE 250MW -200mw recommened-)
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