TTL modulated Ebay laser or M140

[Kalsongen]

Hello,

Im thinking about buying a higher powered laser than my current ones, 405nm 50mW and 532nm 50-80mW. Ive looked at this one from ebay:

445nm 450nm 500mW Blue Laser Module TTL Modulation | eBay

But ive also looked at this one:

1W 1 5W 445nm A140 Blue Laser Diode in Copper Module w Leads | eBay

+ Driver (link me a suitable one please ), TEC, Arduino And a block of copper or aluminium.

Benefits/Negative things about these 2?

-Victor

 

[DashApple]

Re: DPSS Ebay laser or M140

Well the first one , in the ebay link isn't a DPSS , its a diode , just like the one in the second link .

The first one is the full thing , so just apply power and modulation signal , done .

The second one needs the driver plus the heat sink so it depends on the price range you are looking for , the A140 is giving 500mW over the one from the first link but at the cost of you needing to buy the rest and assemble it .

 

[Kalsongen]

Re: DPSS Ebay laser or M140

Well the first one , in the ebay link isn't a DPSS , its a diode , just like the one in the second link .

The first one is the full thing , so just apply power and modulation signal , done .

The second one needs the driver plus the heat sink so it depends on the price range you are looking for , the A140 is giving 500mW over the one from the first link but at the cost of you needing to buy the rest and assemble it .

Thanks for the answear.

Mudulation signal? I thought this only was + and -
As u see in the post i made at the top i was thinking of making a TEC cooled laser with the M140 by using a Arduino UNO REV 3

-victor

 

[Kalsongen]

Hey, from what i understand i can just supply constant 12 V to TTL connection? im only going to use this laser for burning.

-victor

 

[NoodleSlayer]

TTL is defined as 0-5 volts, with an actual crossover from "off" to "on" well below the 2.5 volt halfway point.

That module probably doesn't implement true TTL, but rather uses the term to mean "0-5 volts". 12 volts will almost certainly kill the control circuit.

If you have a single 12 volt supply, and want to use a mechanical switch, I'd say string three equal resistors (5-10 thousand ohms would be good) in series between 12 volts and ground, so it divides that 12 volts into three 4 volt steps. Connect your control line to the 4 volt point. Connect your switch between ground and that 4 volt point as well. When the switch is open, the control line will be pulled to 4 volts. When the switch is closed (shorts across the bottom resistor), the control line will be at zero volts. Those values will be safe for the "TTL" control line, and will likely operate it fine.