Old 06-08-2018, 07:39 PM #1
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
overambitious overambitious is offline
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
Default First build, custom driver advice?

I recently broke my first laser pointer, a 75mW 405 Wicked Laser Nano that a friend gave me. Naturally, I've chosen to replace it... with a fully custom 2W 462nm build.

A key feature that I want is the ability to adjust the current in use, I've found plenty of adjustable drivers so far but they all rely on tiny 10-turn trimpots that aren't designed to be accessible when mounted. Ideally, I want a handheld laser with a knob that will let me change it from 'stupidly dangerous' to 'mildly irresponsible' and back without having to crack it open in between.

I have a couple main questions:
1. Is it bad for the health of the diode to run it at low current? It's nominally a 2W diode at 1.8A, but the testing images show it functioning at 25mW at 200mA. Is this an acceptable way to run it in everyday use, or only for brief periods while showing the response curve?
2. Is it bad for the health of the diode to adjust the current while it's operating?
3. Am I going to need to make a full driver board, or can I just cut the 10-turn pot off an existing one and run new wires to a new pot?

I'll be doing all of my testing with a 2W 445nm diode since it's about 1/5 the price, and I bought a benchtop 50-3000mA driver that looks pretty simple but won't fit in a reasonably sized host. Ideally, I'd love the finished version to include a tiny arduino of some sort with a readout for real-time current draw and approximate wattage. If there's a reason that's very doable or very impossible, I'd love to know about it.

Thanks in advance for your help!


overambitious is offline   Reply With Quote


















Old 06-08-2018, 07:43 PM #2
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
overambitious overambitious is offline
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
Default Re: First build, custom driver advice?

I should add that I'm a mechanical engineer by trade, with limited experience with circuits and software but access to a full machine shop and EE lab with professional equipment. I'm taking on this project to get a bit better with circuits (and probably LTspice in the process), and hopefully some basic arduino programming too. Because it's about learning (and having an awesome blue laser), I'd rather do things the right way than the easy way.
overambitious is offline   Reply With Quote
Old 06-08-2018, 07:45 PM #3
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 9,347
Rep Power: 6734062
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 9,347
Rep Power: 6734062
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: First build, custom driver advice?

1. No, that's fine.
2. It's not advisable to change the current setting with the laser running.
3. To expand on the last point, you really want to use a driver that supports analogue modulation. Those drivers take a 0-5V signal and adjust the current between a minimum and maximum set pointed based on the input voltage. 0V = minimum, 5V = maximum.
diachi is online now   Reply With Quote
Old 06-08-2018, 09:59 PM #4
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
overambitious overambitious is offline
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
Default Re: First build, custom driver advice?

So based on some more research, it sounds like I want to buy/make an analog driver board rather than the TTL driver I already ordered (damn!). The information about analog vs TTL seems mostly oriented around driving multicolor arrays for light shows and precision waveforms for scientific research, but not well suited to people who are just trying to make a laser pointer.

I'm going to state a bunch of my beginner assumptions as facts, and hopefully people will be able to confirm/refute them without thinking I'm too much of an idiot.

- For an adjustable TTL driver, you have the binary option ON/OFF, where ON is whatever current you set beforehand with the trimpot.

- For an adjustable analog driver, you have a maximum current of [whatever], with 0%-100% control limited only by the resolution of your control potentiometer.

- Modulating a TTL laser while it's on is bad, but modulating an analog laser while it's on is fine because that's literally what the circuit is made for.

- I can replace the current adjustment trimpot with some sort of arduino-controlled circuit that will allow me to control the laser frequency in software with limits that will make it safer to play with.
overambitious is offline   Reply With Quote
Old 06-08-2018, 11:19 PM #5
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: First build, custom driver advice?

What gave you the idea that modulating the TTL input of a driver is bad for the laser diode? It is not. It is much better than changing the current of the diode on the fly. All you need to do it use a PWM and vary the pulse width.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

473nm 50 mW BWB-10-OEM DPSS
477nm 127 mW 501B
488nm 135 mW EDC Sharp diode
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
493nm 120 mW 501B
502nm 110 mW 501B Lifetime
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
574nm OptLaser DPSS Laser 36 mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
638nm 1 watt Cyprus II
635nm 100mW pointer
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
Ocean Optics USB2000 Spectrometer
B&W TEK BTC100 Spectrometers X3
Scientech Vector S310 with AC2500 10 Watt LPM/ Hyperion 6 Watt & 20 Watt LPM/ Radiant X4 3.7 Watt LPM
paul1598419 is online now   Reply With Quote
Old 06-09-2018, 02:02 AM #6
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
overambitious overambitious is offline
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
Default Re: First build, custom driver advice?

No, I was referring to modulating the current of a TTL laser while PWM is at 100%, which I still assume is bad. My reason for wanting actual current adjustment is that I assume that for most casual use I'd want to keep the output power low enough that the PWM would be obvious.

Would it be okay to have internal switching that runs TTL at 100%, then shuts it off before the amperage change, and then immediately restores power? My goal is to be able to reduce the emission to a safe continuous beam (low power, 100% PWM), rather than an infrequent blinding strobe (100% power, low PWM). Is there a reasonable way to do that?
overambitious is offline   Reply With Quote
Old 06-09-2018, 03:55 AM #7
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: First build, custom driver advice?

There is no need to use TTL at all if you are running it at 100%. There are drivers that have analog modulation that is safe for your laser diode. Varying the current on the fly by adjusting the current set pot is not, however.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

473nm 50 mW BWB-10-OEM DPSS
477nm 127 mW 501B
488nm 135 mW EDC Sharp diode
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
493nm 120 mW 501B
502nm 110 mW 501B Lifetime
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
574nm OptLaser DPSS Laser 36 mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
638nm 1 watt Cyprus II
635nm 100mW pointer
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
Ocean Optics USB2000 Spectrometer
B&W TEK BTC100 Spectrometers X3
Scientech Vector S310 with AC2500 10 Watt LPM/ Hyperion 6 Watt & 20 Watt LPM/ Radiant X4 3.7 Watt LPM

Last edited by paul1598419; 06-09-2018 at 03:56 AM.
paul1598419 is online now   Reply With Quote
Old 06-11-2018, 08:52 PM #8
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
overambitious overambitious is offline
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
Default Re: First build, custom driver advice?

I guess I've been unclear. What I'm trying to achieve is a handheld laser using a 2W diode, that can be given a user-selected current to produce a continuous beam of variable strength ranging from 'amusing toy' to 'engraving tool' with the adjustment of a knob on the housing. It would be nice if the power could be adjusted while the laser was firing, but is certainly not necessary.

As I understand, this sounds like a build that is more suited to an analog driver than a TTL driver. Additionally, I'll probably have to create some circuitry (or arduino code) to interrupt the laser beam while current adjustments are being made.
overambitious is offline   Reply With Quote
Old 06-11-2018, 09:20 PM #9
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: First build, custom driver advice?

I believe there are some Black Buck drivers that would meet your needs here. They have a place where you can solder the leads from a pot to the driver for adjustment of the power. I'm not sure if it is required to turn the laser off before adjusting it, but it is ready made to do this.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

473nm 50 mW BWB-10-OEM DPSS
477nm 127 mW 501B
488nm 135 mW EDC Sharp diode
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
493nm 120 mW 501B
502nm 110 mW 501B Lifetime
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
574nm OptLaser DPSS Laser 36 mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
638nm 1 watt Cyprus II
635nm 100mW pointer
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
Ocean Optics USB2000 Spectrometer
B&W TEK BTC100 Spectrometers X3
Scientech Vector S310 with AC2500 10 Watt LPM/ Hyperion 6 Watt & 20 Watt LPM/ Radiant X4 3.7 Watt LPM
paul1598419 is online now   Reply With Quote
Old 06-11-2018, 09:33 PM #10
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 9,347
Rep Power: 6734062
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 9,347
Rep Power: 6734062
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: First build, custom driver advice?

Quote:
Originally Posted by overambitious View Post
I guess I've been unclear. What I'm trying to achieve is a handheld laser using a 2W diode, that can be given a user-selected current to produce a continuous beam of variable strength ranging from 'amusing toy' to 'engraving tool' with the adjustment of a knob on the housing. It would be nice if the power could be adjusted while the laser was firing, but is certainly not necessary.

As I understand, this sounds like a build that is more suited to an analog driver than a TTL driver. Additionally, I'll probably have to create some circuitry (or arduino code) to interrupt the laser beam while current adjustments are being made.
Quote:
Originally Posted by paul1598419 View Post
I believe there are some Black Buck drivers that would meet your needs here. They have a place where you can solder the leads from a pot to the driver for adjustment of the power. I'm not sure if it is required to turn the laser off before adjusting it, but it is ready made to do this.
You can adjust the power on the fly while the diode is on. That's the whole point of having analogue modulation.
diachi is online now   Reply With Quote
Old 06-11-2018, 09:34 PM #11
Class 3B Laser
 
Join Date: May 2011
Posts: 4,348
Rep Power: 12289605
Encap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond repute
Encap Encap is offline
Class 3B Laser
 
Join Date: May 2011
Posts: 4,348
Rep Power: 12289605
Encap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond repute
Default Re: First build, custom driver advice?

Quote:
Originally Posted by diachi View Post
You can adjust the power on the fly while the diode is on. That's the whole point of having analogue modulation.
Exactly--TTL is just either on or off control.
Encap is offline   Reply With Quote
Old 06-11-2018, 10:56 PM #12
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: First build, custom driver advice?

I thought the BB driver could be adjusted while on. Just wasn't absolutely sure, so I added that qualifier.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

473nm 50 mW BWB-10-OEM DPSS
477nm 127 mW 501B
488nm 135 mW EDC Sharp diode
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
493nm 120 mW 501B
502nm 110 mW 501B Lifetime
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
574nm OptLaser DPSS Laser 36 mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
638nm 1 watt Cyprus II
635nm 100mW pointer
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
Ocean Optics USB2000 Spectrometer
B&W TEK BTC100 Spectrometers X3
Scientech Vector S310 with AC2500 10 Watt LPM/ Hyperion 6 Watt & 20 Watt LPM/ Radiant X4 3.7 Watt LPM
paul1598419 is online now   Reply With Quote
Old 06-11-2018, 11:36 PM #13
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
overambitious overambitious is offline
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
Default Re: First build, custom driver advice?

Quote:
Originally Posted by paul1598419 View Post
I believe there are some Black Buck drivers that would meet your needs here. They have a place where you can solder the leads from a pot to the driver for adjustment of the power. I'm not sure if it is required to turn the laser off before adjusting it, but it is ready made to do this.
I see this on the Blackbuck 8, but not 6. In both cases though the datasheet has a lower limit of 1000mA, which makes sense for an engraver or something but doesn't do me much good here. This is what I got for my benchtop, which claims 50-3000mA. Definitely not going to fit in a handheld host :/

I found references to X-drive and X-boost models with 150-1800mA ranges, but nothing that's in stock. Any thoughts on where I should be looking to dig up something in my range? I'm also happy to build it myself and comfortable with soldering, but I don't know a damn thing about circuit design.

EDIT: Am I grossly misunderstanding this? The other interpretation is that the blackbuck driver is setting the MAX, and then the analog pot lets you go 0-100% OF THAT VALUE. Which would mean that I could use a blackbuck 8 to drive an analog laser from 0-8000mA, or from 0-1000mA, but not 0-250mA without burning it up if I went above 25% (or some threshold value).

Last edited by overambitious; 06-11-2018 at 11:45 PM.
overambitious is offline   Reply With Quote
Old 06-12-2018, 01:27 AM #14
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 11,114
Rep Power: 12104634
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: First build, custom driver advice?

You want a Black Buck 8 driver. Here is a link where you can buy one: https://sites.google.com/site/dtrlpf...r/8a-blackbuck.

Edit: I see you want to set this below 1 amp. If so, this may not work for you. There are likely other drivers that can, I just don't have a link to one.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

473nm 50 mW BWB-10-OEM DPSS
477nm 127 mW 501B
488nm 135 mW EDC Sharp diode
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
493nm 120 mW 501B
502nm 110 mW 501B Lifetime
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
574nm OptLaser DPSS Laser 36 mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
638nm 1 watt Cyprus II
635nm 100mW pointer
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
Ocean Optics USB2000 Spectrometer
B&W TEK BTC100 Spectrometers X3
Scientech Vector S310 with AC2500 10 Watt LPM/ Hyperion 6 Watt & 20 Watt LPM/ Radiant X4 3.7 Watt LPM

Last edited by paul1598419; 06-12-2018 at 01:34 AM.
paul1598419 is online now   Reply With Quote
Old 06-12-2018, 07:14 AM #15
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
overambitious overambitious is offline
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
Default Re: First build, custom driver advice?

As I understand it though it should be fine, since I want to have analog control over a 1.8A diode. I would have issues if I wanted to use that driver for a 250mA diode, since I couldn't run the analog signal to 100% without frying it.

Can someone please confirm or refute this?
overambitious is offline   Reply With Quote
Old 06-12-2018, 05:15 PM #16
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
overambitious overambitious is offline
Junior Member
 
Join Date: Jun 2018
Location: California
Posts: 8
Rep Power: 0
overambitious is on a distinguished road
Default Re: First build, custom driver advice?

I'm just gonna go for it! I just ordered the blackbuck 8 and already purchased a cheap 2w 445 diode, so it's time to head to the test bench and see what happens. I'll report back if it fails to run under 1000mA (or fries).
overambitious is offline   Reply With Quote
Reply

Tags
blue 463nm, build, custom, driver





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 02:47 PM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC