Help need About Physiotherapy Laser Driver circuits

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keith1200rs said:
7mW is bright! The real value for Rm for 7mW will be 5k ohms or less. With 100k you are probably only around 350uW.

You need a power meter.

And I hope you are wearing safety goggles at all times.

Keith.
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Thanks keith...
Now i have bit idea about calculations... Yes..! i am wearing goggles while playing with lasers....
 

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