Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Drivers, Test-load, Power Supply, & Batteries



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 07-31-2015, 04:48 PM #1
Junior Member
 
Join Date: Jul 2015
Posts: 2
Rep Power: 0
zeroG is on a distinguished road
zeroG zeroG is offline
Junior Member
 
Join Date: Jul 2015
Posts: 2
Rep Power: 0
zeroG is on a distinguished road
Default Driving 10 (5mW, red) laser diodes

Hi!

I need to use 10 laser diodes, here's the specs:

Laser Power 150mW
Size 6-10.5
Spot mode Point-like spot, Continuous output
Laser wavelength 650nm(red)
Power <5mw
Supply Voltage 50 VDC (maybe max rating??)
Current <40mA

First of all, i made this calculation: one diode needs 150 mW. If i have a 5V supply, i should give 30 mA (150 mW / 5 V).
So, for 10 diodes in parallel, i should use a power supply which gives 30 mA x 10 diodes = 300 mA @ 5V.

...is it correct?

Please tell me if it is correct, and then i can talk about the power supply circuit (it may become confusing )

Thank you!


zeroG is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 08-01-2015, 12:46 AM #2
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,432
Rep Power: 17686
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,432
Rep Power: 17686
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Driving 10 (5mW, red) laser diodes

If they require 5 volts dc on the input, you are probably using a lasser doide with a driver built in there somewhere. These drivers can be small enough to fit rather small laser diode enclosures, but are surely there if they run off 5 volts.

30 mA current per diode + driver circuitry is not a strange value, so if you run 10 of them in parralel you could be looking at 300 mA supply current.

The best thing to do is to actually measure the current draw from one of these units though, as it could be a fair bit less than 30 mA, or all the way up to the specced 40 mA depending on what diode is in there and how the driver was constructed.
Benm is online now   Reply With Quote
Old 08-01-2015, 08:07 AM #3
Junior Member
 
Join Date: Jul 2015
Posts: 2
Rep Power: 0
zeroG is on a distinguished road
zeroG zeroG is offline
Junior Member
 
Join Date: Jul 2015
Posts: 2
Rep Power: 0
zeroG is on a distinguished road
Default Re: Driving 10 (5mW, red) laser diodes

Quote:
Originally Posted by Benm View Post
If they require 5 volts dc on the input, you are probably using a lasser doide with a driver built in there somewhere. These drivers can be small enough to fit rather small laser diode enclosures, but are surely there if they run off 5 volts.
I think you're right, i bought this, i can see a small board inside the head and in the title it says 5V: Mini 650nm 5V 5mW Laser Diode Light Module Head Red for Raspberry Pi Arduino NEW | eBay

So, what if i use a simple lm7805 voltage regulator, without any current control? 7805 can source about 1.5A with heatsink.
zeroG is offline   Reply With Quote
Old 08-02-2015, 12:46 AM #4
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,432
Rep Power: 17686
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,432
Rep Power: 17686
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Driving 10 (5mW, red) laser diodes

Those seem like the ones with control circuits built in that run off 5 volts straight, so you can use your 7805 regulator with just its two buffer caps and be done with the power suppply.

They also market them to be driven directly off arduino's so the current draw will probably be 30 mA or less each.
Benm is online now   Reply With Quote
Old 08-02-2015, 03:38 AM #5
APEX1's Avatar
Class 3R Laser
 
Join Date: Mar 2015
Location: LEVITTOWN PA
Posts: 1,120
Rep Power: 421
APEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond repute
APEX1 APEX1 is offline
Class 3R Laser
APEX1's Avatar
 
Join Date: Mar 2015
Location: LEVITTOWN PA
Posts: 1,120
Rep Power: 421
APEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond reputeAPEX1 has a reputation beyond repute
Default Re: Driving 10 (5mW, red) laser diodes

definitely post some pictures when you finish building it!
__________________
Justin

THANK A VET!

some lasers
1W 405 LABBY
3wNDB7875 SKYRAY
(2) 2WM140 BUILDS
1.5W CAS!O 501B
2W M462 WICKED LASER REPLICA HOST
1.2W 520 LABBY
500MW 532 PLE-PRO
180MW 532 EBAY OVERKILL


Some of my stuff is for sale check them out here <---link

NEED HELP ON YOUR FIRST BUILD? CLICK HERE OR HERE
APEX1 is offline   Reply With Quote
Reply





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











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 10:34 PM.


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