Leave it running for a day is it still working? If so, you likely have your answer. ![]() If you are still concerned about rapid switching, go out and get an el-cheapo pointer from the "dollar store" and hack it once you have it switchable, hook it up to the Arduino and mod the blink sketch to pulse it rapidly. Now, if you were talking about tube lasers or other systems, that would be a different matter. If turning on and off the supply voltage killed them easily, they wouldn't be sold for use as laser pointers or other applications, because they would be virtually useless. These lasers are nothing more than slightly differently constructed LEDs, with collumnating lens assemblies, and special current-limiting drivers.
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