I bought this laser module: http://www.robotshop.com/ca/sfe-green-laser-module.html
What I got IS NOT what is in the product picture. See attachment images of what I actually got (I removed the button and connected wires directly).
It is using a LM358 op-amp.
The module loses brightness when the laser gets warm. After about 10 seconds, you can barely see laser! If I leave it off for a while, then I turn it ON, it's bright again for a few seconds.
When it's warm, and I turn it OFF and then ON, I see a short burst of bright light, then it goes dim after a few milliseconds.
I need the laser to pulsate at 50% duty cycle, and about 10 to 20 times per second. The frequency depends on the brightness of the laser and also the brightness of the environment.
Because of the way this laser driver module is built, I have a feeling it is not supposed to pulsate? (I think because it is using caps, it takes a while to initialize)
Do I have to make my own laser driver that is designed to pulsate? Anyone knows a good schematic for what I need?
What I got IS NOT what is in the product picture. See attachment images of what I actually got (I removed the button and connected wires directly).
It is using a LM358 op-amp.
The module loses brightness when the laser gets warm. After about 10 seconds, you can barely see laser! If I leave it off for a while, then I turn it ON, it's bright again for a few seconds.
When it's warm, and I turn it OFF and then ON, I see a short burst of bright light, then it goes dim after a few milliseconds.
I need the laser to pulsate at 50% duty cycle, and about 10 to 20 times per second. The frequency depends on the brightness of the laser and also the brightness of the environment.
Because of the way this laser driver module is built, I have a feeling it is not supposed to pulsate? (I think because it is using caps, it takes a while to initialize)
Do I have to make my own laser driver that is designed to pulsate? Anyone knows a good schematic for what I need?
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