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I have my diode still partially mounted in the dvd burner heatsink sitting inside a battery case and accidently bumped the power switch while in my pocket when I pulled it out several minutes later it was very warm and only had a faint red dot I switched it off and on again a few minutes later...

I was previously thinking about using a 7806 or zener regulator to supply DDL's circuit then tonight had another idea which may prevent over voltage should the LD disconnect from the circuit (ie giving full charge to capacitor) would be to put the zener/transistor configuration after the current...

I believe by using a standard pnp transistor with a zener diode would give you a fairly accurate voltage regulator I think that zeners are available as 2.7 and 3.3 v which would just leave the resistor of around 19~24 ohm depending on which zener was used Would this work in practice ? if it...

Hi I would like to build my first simple laser and have come across this little package http://www.jaycar.co.nz/productView.asp?ID=ZD1954&CATID=&keywords=ZD1954&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID= Although this would only be a...