theo92
New Member
Long days back, I'm here but in a different forum. I've postponed my uC projects for a few months. Now I'm in LASER experiments.
About 9 months ago I got a red laser diode from DVD-ROM. It worked nice but never looked like a 'real pointer like,' the beam is hard to find, the only thing you can see the collimated point o the wall. Even in darkness, the point was not bright enough.
I dont have any datasheet for this thing.
**broken link removed**
Now I decided to make a real pointer.
Firstly, I've consider the diode. I've only farnell.in to buy it. My local shop says a big no no for it.
A red one or a green one? I know green is better but will a red laser diode based pointer will be good enough? I'm a amateur astronomer, Can you tell, will a red pointer will be sufficient enough to point a star or constellation with its beam?
Now come to power of the diode. Farnell has two nice and low cost LD.
1:One has a power of 5mW and a maximum power of 7mW, they recommend it for laser pointer.
2:Another one has a power of 7mW and a max power of 10mW they recommend it for automobole DVD player.
So, which one to choose?
Will it serve my amateur astronomy purpose well?
Now this is specially for indian electrotechs(specially MVS Sarma), can somebody tell me a good indian store/shop/distributor who sell laser diodes? Silicon Components? They never replied my mail. Any store in india for that?
About 9 months ago I got a red laser diode from DVD-ROM. It worked nice but never looked like a 'real pointer like,' the beam is hard to find, the only thing you can see the collimated point o the wall. Even in darkness, the point was not bright enough.
I dont have any datasheet for this thing.
**broken link removed**
Now I decided to make a real pointer.
Firstly, I've consider the diode. I've only farnell.in to buy it. My local shop says a big no no for it.
A red one or a green one? I know green is better but will a red laser diode based pointer will be good enough? I'm a amateur astronomer, Can you tell, will a red pointer will be sufficient enough to point a star or constellation with its beam?
Now come to power of the diode. Farnell has two nice and low cost LD.
1:One has a power of 5mW and a maximum power of 7mW, they recommend it for laser pointer.
2:Another one has a power of 7mW and a max power of 10mW they recommend it for automobole DVD player.
So, which one to choose?
Will it serve my amateur astronomy purpose well?
Now this is specially for indian electrotechs(specially MVS Sarma), can somebody tell me a good indian store/shop/distributor who sell laser diodes? Silicon Components? They never replied my mail. Any store in india for that?