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I want to improve my idea on laser power meter. My first idea has been thermistor in combination with power resistor (see my previous topic). It works, but thermistor has pretty slow reaction time (it takes more than minute to stabilise) and also is too small (I didn't find any big thermistors)...

Hello, I will need to measure real output power of fake 200 mW green laser pointer I have ordered on eBay, so I have been searching for some simple and cheap approximate laser power meter. My first idea was simple photodiode + ammeter. I am sure it would work (and it could be even pretty...

Hello, I am new on this forum. About a week ago, I have ordered 200 mW green laser from eBay. I know that almost all green laser pointers on eBay are pretty much scams (less powerful than advertised, without IR filter, etc.), but I have given it a try anyway. I would like to know your opinions...