My first diy laser build!

Twisted · Sep 9, 2011

Carl Witcombe said:
Powerwise the LPC-815 is slightly more powerful than it's little sister 822, I have home builds using both diodes, and the 815 is by far the best, but less forgiving.

They don't seem to sell the LPC-815 or 822, not sure what their shipping costs are. If they are US/Canada based you'll get them cheaper from there anyway. but like I said they don't seem to stock what I got.:na:

Other than that, They are a larger company, I am only helping out my fellow Laser enthusiasts, I have sold diodes to the US and Canada not many I admit, also to Europe, as well as Isreal to but a few. Just for the sake of it check out my Feedback,

Okay but, Which diode is better of yours and are there any other even better diodes. Not talking about power.

Carl Witcombe · Sep 9, 2011

Okay but, Which diode is better of yours and are there any other even better diodes. Not talking about power.

I would have to say that the LPC-826 is capable of producing more light, but not sure of the build quality as I have not used them, 815 as said before is easily destroyed, where as the 822 is a little more forgiving. Eg I have in the past while setting the pot exceeded the diodes limit, when the pot was turned down, the LD came back to life. I am not saying that every 822 will react in this way but that one did, I guess it depends on how much and how long you feed that current.

Build quality on the 815 and 822's are good
The BDR-S06J is a BluRay Diode that I have plans for in the future so can't comment right now.

Twisted · Sep 9, 2011

Carl Witcombe said:
I would have to say that the LPC-826 is capable of producing more light, but not sure of the build quality as I have not used them, 815 as said before is easily destroyed, where as the 822 is a little more forgiving. Eg I have in the past while setting the pot exceeded the diodes limit, when the pot was turned down, the LD came back to life. I am not saying that every 822 will react in this way but that one did, I guess it depends on how much and how long you feed that current.

Build quality on the 815 and 822's are good
The BDR-S06J is a BluRay Diode that I have plans for in the future so can't comment right now.

Well a friend told me that the LPC-826 is basically the best quality and I don't know if I overturn the pot or not or under-turn it :\ if I choose the 822 would my components work or can you find new ones as-well as the cr2 batterys. Oh and the red 200mw 2x cr2 laser from DX apparently kills the bats fast will mine?

Carl Witcombe · Sep 9, 2011

I can't comment on the 826 as I have not seen or used them, there are a few threads associated with these diodes on here and elsewhere.

in a nutshell, When setting the current for a given diode you decide at what current is safe (After researching the diode), then using resistors that give that current, but before connecting the LD use a dummy load to set the pot.

again much information can be found on dummy loads on this forum. the 822's would work with your components but the resistors would need to be re-calculated.

Oh and the red 200mw 2x cr2 laser from DX apparently kills the bats fast will mine?

I'd like to see that

Twisted · Sep 9, 2011

Carl Witcombe said:
I can't comment on the 826 as I have not seen or used them, there are a few threads associated with these diodes on here and elsewhere.

in a nutshell, When setting the current for a given diode you decide at what current is safe (After researching the diode), then using resistors that give that current, but before connecting the LD use a dummy load to set the pot.

again much information can be found on dummy loads on this forum. the 822's would work with your components but the resistors would need to be re-calculated.

I'd like to see that

Okay I'm getting a bit stressed thinking this is a impossible billion dollar build.

if I use all the things I was gonna in the first place plus the 100ohm pot
and 2.77ohm resister
and 1N4001
and cr2 bats will I be fine and just turn the pot until it gets bright or lights a match or pops a balloon whatever I require that a 200mw "SHOULD ALWAYS" do... I don't think I will ever be able to finish this because of all these changes and stuff :\. Oh and thanks for the help and sorry for whining

Carl Witcombe · Sep 9, 2011

I'll make a list of what you need to build your first laser driver tomorrow, it's 3AM here and I'm up early to take kids to school at 8am.

Now, you need to read lots of info with regards to laser drivers, it's not hard if you research your subject, we all started the same way, with predictable results, but you will suceed, your next post needs to be the diode you will be basing your build on.

Then tomorrow I'll post the list, a few posts up I included a picture of the components set out as they should be on the stripboard study it, then read the associated link 'laser driver it can be done' study that to.

Don't worry. See you later.

Carl

Twisted · Sep 9, 2011

Carl Witcombe said:
I'll make a list of what you need to build your first laser driver tomorrow, it's 3AM here and I'm up early to take kids to school at 8am.

Now, you need to read lots of info with regards to laser drivers, it's not hard if you research your subject, we all started the same way, with predictable results, but you will suceed, your next post needs to be the diode you will be basing your build on.

Then tomorrow I'll post the list, a few posts up I included a picture of the components set out as they should be on the stripboard study it, then read the associated link 'laser driver it can be done' study that to.

Don't worry. See you later.

Carl

Can you message me your Facebook or something because it would make it so much easier to instant message

Tech_Junkie · Sep 9, 2011

Twisted said:
Can you message me your Facebook or something because it would make it so much easier to instant message

The man has already spent major time helping you out. I think its your turn to do some reading and find the rest of the answers on your own. We are here to help, but no one is going to walk you every step of the way. Its the only way you'll learn how it all works. We all had to do it.

Carl Witcombe · Sep 9, 2011

As promised You need these to build a driver:-

LM317 Regulator
100 Ohm Pot
Resistors to the Value of 4.1 Ohms
1N4001 Protection Diode
47uf 16v Capacitor

I don't do Facebook, better things to do with my time.

The above resistors will provide the LPC-822 diode
with approx 300 Ma, giving you a light intensity
of 215Mw approx.

Before you purchase the Diode I would advise that you
read up on the following, Laser drivers, the components,
why you need them and what they do within the circuit.

I would also read about dummy loads and what their
purpose is, remember, most suppliers of diodes will not refund
if the packaging has been opened and for good
reason too, LD's are very sensitive to shock, over current.

you can't expect people to do all the
donkey work for you, Before I even registered on here
I researched everything I could, when something new
was encountered I researched that.

I only registered when my Laser was working, Ok the
batts were flat by the time I made my 1st post.
But hey how much fun can you have knowing that the
laser you have can lase over a mile away.

Warning: If you don't do your homework, this hobby
will cost you an arm and a leg.

I totally agree with TJ, I spent the best part of 4
Months researching how to build a laser, I am no expert
i'll leave that to others on here. If I can help i'll
help, but do your bit.

If you read one of the subjects that confuses you
ask, that's what we are here for.

Good Luck

TJ Thanks for the REP.

Twisted · Sep 9, 2011

Carl Witcombe said:
As promised You need these to build a driver:-

LM317 Regulator
100 Ohm Pot
Resistors to the Value of 4.1 Ohms
1N4001 Protection Diode
47uf 16v Capacitor

I don't do Facebook, better things to do with my time.

The above resistors will provide the LPC-822 diode
with approx 300 Ma, giving you a light intensity
of 215Mw approx.

Before you purchase the Diode I would advise that you
read up on the following, Laser drivers, the components,
why you need them and what they do within the circuit.

I would also read about dummy loads and what their
purpose is, remember, most suppliers of diodes will not refund
if the packaging has been opened and for good
reason too, LD's are very sensitive to shock, over current.

you can't expect people to do all the
donkey work for you, Before I even registered on here
I researched everything I could, when something new
was encountered I researched that.

I only registered when my Laser was working, Ok the
batts were flat by the time I made my 1st post.
But hey how much fun can you have knowing that the
laser you have can lase over a mile away.

Warning: If you don't do your homework, this hobby
will cost you an arm and a leg.

I totally agree with TJ, I spent the best part of 4
Months researching how to build a laser, I am no expert
i'll leave that to others on here. If I can help i'll
help, but do your bit.

If you read one of the subjects that confuses you
ask, that's what we are here for.

Good Luck

TJ Thanks for the REP.

Thx alot but for now I found out how to do my laser somewhere else and I am not gonna build another laser until I learn a bunch of stuff but for now I'm happy I can finish my burning laser

I talk to a friend and he gave me some helpful info:

what I need is:

1x LM2940
2x 3 ohm resisters
1x 47 16v Capacitor
1x LPC-826

Also I already have 2 1n4001 or whatever you told me to get rectifier diode
but what I don't have is something that will show me where to put these components

and right after I build this and test it it will be straight to the books! By that I mean my friend Google!

Carl Witcombe · Sep 9, 2011

I am not entirely sure if that one will work, that particular Regulator is a non-adjustable regulator. the center pin with the LM317 is the adjust which will go to the other end of the resistor, where as the LM2940's center pin goes to ground so theres no current adjustment, meaning that the charge state of your power source (batts) determines how much current your diode gets, even if it's higher than your diode can safely handle.

Someone in the know will need to check this as it's only my opinion. I'm no electrician.

That won't be a 200Mw laser nowhere near it.

I have provided the component diagram, I even provided a list of components that will most certainly work. Almost Everything you require to finnish your build is in this thread, the only thing that is missing is your will to do it correctly.:banghead:

Here lies another dead diode RIP.

Read, Read, Read.

Twisted · Sep 9, 2011

Carl Witcombe said:
I am not entirely sure if that one will work, that particular Regulator is a non-adjustable regulator. the center pin with the LM317 is the adjust which will go to the other end of the resistor, where as the LM2940's center pin goes to ground so theres no current adjustment, meaning that the charge state of your power source (batts) determines how much current your diode gets, even if it's higher than your diode can safely handle.

Someone in the know will need to check this as it's only my opinion. I'm no electrician.

That won't be a 200Mw laser nowhere near it.

I have provided the component diagram, I even provided a list of components that will most certainly work. Almost Everything you require to finnish your build is in this thread, the only thing that is missing is your will to do it correctly.:banghead:

Here lies another dead diode RIP.

Read, Read, Read.

It worked for him and why not near 200 some people push it to 400mw! :wtf:

Carl Witcombe · Sep 9, 2011

It worked for him

Like I said I am just going by what I read in relation to that particular regulator.

and why not near 200 some people push it to 400mw!

The resistor combination 208Ma will only produce 100Mw approx

Twisted · Sep 9, 2011

Carl Witcombe said:
Like I said I am just going by what I read in relation to that particular regulator.

The resistor combination 208Ma will only produce 100Mw approx

I think my friend said it was 420mA and probably 220mW

well my dad was thinking about not letting me build it and then he said well 100mw I might be okay with

Twisted · Sep 9, 2011

Twisted said:
I think my friend said it was 420mA and probably 220mW well my dad was thinking about not letting me build it and then he said well 100mw I might be okay with

Is there any way to make sure it will be 100mw because I kinda wanna leave it at 100mw on the 300mw diode which should last long and be extremely efficient

and on my second laser after I research will be 200mw (violet laser in a flashlight maybe from jrob =) )

Carl Witcombe · Sep 9, 2011

Look, no disrespect to you, Lasers are awesome, you want one, you want to build one, I take it that you are relatively young. thats fine.

Do yourself a favour, You asked us whether the items were correct to build a laser, I guessed that you have no experience with lasers and the accompanying drivers that power the Diode. I have given you information and a diagram on how I built my own laser driver.

This driver works, I guess you've seen the video of the laser working also, you have seen the proof that the laser works.

Now Go back to the 1st post in your thread, and read the entire thread until you understand it's content.

Peace

My first diy laser build!

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