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PHR 803T 405nm Diode Extract

A

Anthony16r

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Feb 20, 2010
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Yes I know it's to protect the laser diode from reverse polarity but I heard on the internet that shottky and zener diodes could be used for this purpose(not laser related). So I wanted to be sure. Also I have some 1N4001 diodes but I couldn't find them in a smd version whereas shottky and zener diodes exist in smd.
 
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Lonewolf

Lonewolf

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Anthony16r said:
Yes I know it's to protect the laser diode from reverse polarity but I heard on the internet that shottky and zener diodes could be used for this purpose
Click to expand...

I don't think a zener will work for reverse polarity protection.
 
Benm

Benm

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Forget about that diode entirely - just omit it.

As for the capacitor: this can be anything within reason really, 1 uF is an indication, but it will work with a 100 uF of reasonable quality too, but even with smaller (100 nF or so) ceramic caps it will be fine.

I would suggest adding another capacitor at the input of the circuit - its recommended by the manufacturer, and sometimes helps solve otherwise very tricky problems. Anyting 1 uF to 100 uF should be fine here too. Just make sure its rated for at least the input voltage.
 
LarryDFW

LarryDFW

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Forget about that diode entirely - just omit it.
Click to expand...
Anthony16r said:
Can the diode be replaced by any shottky, zener or 1N400x diode of any type?
Click to expand...

Always use a Schottky diode for ELECTROSTATIC protection.
Forward voltage is lower.
For 30 cents, it is a very good protection device.

LarryDFW
 
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KiLLrB

KiLLrB

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LarryDFW said:
Always use a Schottky diode for electrostatic protection.
Forward voltage is lower.
For 30 cents, it is a very good protection device.

LarryDFW
Click to expand...

I think diodes are a handy comopnent to use for reverse polarity i always use them when i can.
 
S

Slavixs

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Mar 15, 2010
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I readed that from PHR i can get the red lasser too (it is in IR diode).. That diode can make a visible beam? If can, what i need to run that diode too?! Thanks!
 
Eudaimonium

Eudaimonium

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Feb 5, 2008
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Slavixs said:
I readed that from PHR i can get the red lasser too (it is in IR diode).. That diode can make a visible beam? If can, what i need to run that diode too?! Thanks!
Click to expand...
FIrst of all, you are spellin 'laser' wrong all the time, one 's' is needed.

Second, the red/IR diode combo from PHR is not worth the trouble, people have been running the red diode at 50mA max, no burning capablities at all.
Not worth the aixiz module IMHO.
 
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