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So, i salvaged 7 LM340 regulators out of some junk audio equipment at work today. Are they any use for making laser drivers? I am not extremely well-versed in the details of electronic components, so comparing datasheets with the 317 tells me nothing useful. can the 340 be used in the same...

So, i have never purchased a laser-pointer, outside of the <5mW Walgreen Special, but i have gone through many phases of running helter-skelter around the internet ooh-ing, aah-ing, and drooling at various .1-1w diode lasers, but not wanting to commit $50-$500 on a laser from a company i know...