Supreminator
New member
- Joined
- Nov 4, 2018
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Hello,
I am building two 80mW laser pointers using 450nm and 520nm Osram laser diodes. More specifically, they are the PL 450B and PL 520B models respectively. I know all the parts that I need to purchase (you can find the list below if it helps), except the drivers for the laser diodes. I plan on powering both pointers using 3.7V 18650 Lithium-Ion batteries. Since there are many people on this forum who have experience building laser pointers, I thought I'd ask for help getting a good driver that fits my project.
Here are my problems and the information I have:
According to the datasheet, the 450nm laser diode has a typical forward voltage of 5.2V, but can take up to 6.5V as well. Its typical operating current is 75mA but it can take up to 125mA as well. However, all the drivers that I can find for this wavelength - that take an input voltage that matches my battery - are designed for much more powerful diodes and deliver current that is at lowest, one amp.
As for the 520nm laser diode, the datasheet states that the laser diode has a typical forward voltage of 6V, but can take up to 8V as well. Its typical operating current is 200mA but it can take up to 240mA as well. However, I cannot find any drivers that match the voltage of my battery, and on the rare case that they do, they are again too powerful.
Again, since there are a lot of people here that have experience building laser pointers, I thought this is the perfect place to bring up this issue. If any of you have any links or knowledge you could share with me, I'd more than appreciate it.
Here is the list of all the parts I have so far, if it helps:
80mW 450nm Osram PL 450B laser diode:
https://www.ebay.ca/itm/LD-PL450B-OSRAM-445nm-450nm-80mW-3-8mm-TO-38-Blue-Laser-Diode/163772865291
80mW 520nm Osram PL 520B laser diode:
https://www.ebay.ca/itm/Osram-520nm-80mW-Green-Single-Mode-3-8mm-Laser-Diode-PL520B-515nm-Semiconductor/132985370641
Laser diode housing module:
https://www.ebay.ca/itm/Housing-1211-3-8-BL-12x11mm-3-8mm-T0-38-Laser-Diode-Heatsink-Holder-M9x0-5/263742315486
G-8 Aspheric Glass Collimation Lens:
https://www.ebay.ca/itm/DTR-G-8-Bro...Lens-WHY-COMPROMISE-HAVE-IT-ALL-/173828377573
Laser pointer host:
https://www.ebay.ca/itm/12mm-laser-...laser-parts-laser-host-for-18650/331194747510
Thank you!
I am building two 80mW laser pointers using 450nm and 520nm Osram laser diodes. More specifically, they are the PL 450B and PL 520B models respectively. I know all the parts that I need to purchase (you can find the list below if it helps), except the drivers for the laser diodes. I plan on powering both pointers using 3.7V 18650 Lithium-Ion batteries. Since there are many people on this forum who have experience building laser pointers, I thought I'd ask for help getting a good driver that fits my project.
Here are my problems and the information I have:
According to the datasheet, the 450nm laser diode has a typical forward voltage of 5.2V, but can take up to 6.5V as well. Its typical operating current is 75mA but it can take up to 125mA as well. However, all the drivers that I can find for this wavelength - that take an input voltage that matches my battery - are designed for much more powerful diodes and deliver current that is at lowest, one amp.
As for the 520nm laser diode, the datasheet states that the laser diode has a typical forward voltage of 6V, but can take up to 8V as well. Its typical operating current is 200mA but it can take up to 240mA as well. However, I cannot find any drivers that match the voltage of my battery, and on the rare case that they do, they are again too powerful.
Again, since there are a lot of people here that have experience building laser pointers, I thought this is the perfect place to bring up this issue. If any of you have any links or knowledge you could share with me, I'd more than appreciate it.
Here is the list of all the parts I have so far, if it helps:
80mW 450nm Osram PL 450B laser diode:
https://www.ebay.ca/itm/LD-PL450B-OSRAM-445nm-450nm-80mW-3-8mm-TO-38-Blue-Laser-Diode/163772865291
80mW 520nm Osram PL 520B laser diode:
https://www.ebay.ca/itm/Osram-520nm-80mW-Green-Single-Mode-3-8mm-Laser-Diode-PL520B-515nm-Semiconductor/132985370641
Laser diode housing module:
https://www.ebay.ca/itm/Housing-1211-3-8-BL-12x11mm-3-8mm-T0-38-Laser-Diode-Heatsink-Holder-M9x0-5/263742315486
G-8 Aspheric Glass Collimation Lens:
https://www.ebay.ca/itm/DTR-G-8-Bro...Lens-WHY-COMPROMISE-HAVE-IT-ALL-/173828377573
Laser pointer host:
https://www.ebay.ca/itm/12mm-laser-...laser-parts-laser-host-for-18650/331194747510
Thank you!
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