Powering an "Suzie" O-Like Green Module w/5v Power Supply

[hevnsnt]

Hey all,

I am building a liquid sky projector using a 30mW green module from O-Like (green laser module 30mW£­>5¡«500mW green laser module£­>Laser&lighting products£­>www.0-like.com). It is stated that the operating voltage is 3.0VDC.. I would like to use a computer power supply to power the entire "projector" do you think it would be ok to send the module 5v vs the 3.0 it calls for?

thanks!

 

[Mohrenberg]

um....no?

i've had modules die after around 15 minutes of total run time...
some thought it was because i was using a fully charged CR2 battery which outputs 4.25v. If your going to try this, expect it to die, that way your not disappointed when it does happen

 

[hevnsnt]

um....no?

i've had modules die after around 15 minutes of total run time...
some thought it was because i was using a fully charged CR2 battery which outputs 4.25v. If your going to try this, expect it to die, that way your not disappointed when it does happen

hmm.. no I would not be happy with that. Unfortunetly I dont have time to build a voltage converter, I have found this circuit and I am wondering if it would work.

with R1=10k and R2=15K

 

[mauswiesel]

just add 3 1N4001 diode in serie , voltage should drop by 1.5 Volt, this will be fine fr your module
you can find this diode in any junk electronic

 

[dr-ebert]

hevnsnt, that's just a voltage divider network. It's useless if you want to draw current. Better use diodes like mauswiesel said (you don't have much control over the output voltage that way) or best, a step-down converter, e.g. the drlava FlexDrive.

 

[LarryDFW]

hevnsnt;

Just find a resistor that drops the voltage enough to give you a little less current than you want.

Run it for a normal operating time and check the current draw at the end of that period.
Make sure it has not increased higher than you want to operate.

LarryDFW

 

[lasersbee]

For a safe bet... you could use a 3.0V regulator... even the LM317 can be set to output
3.0Volts from 5 Volts... Or you can use a Fixed 3.3Volt Regulator like this one...

http://media.digikey.com/pdf/Data%20Sheets/Sharp%20PDFs/PQ05RD11,%20PQ3RD13.pdf

It only costs $1.71Cnd in single unit quantities and is rated for 1 Amp
of current...


Jerry

 

[Hemlock_Mike]

The regulators are the best bet but series diodes if you measure the applied voltage also are fine. A resistive voltage divider won't work unless you account for module draw current.

Mike