First ever childproof Burning Laser? ~100mW

SMIDSY · Mar 11, 2008

Here is my first DIY red (650nm) laser ever.
my other DIYs are here (All terrain torch) and here (micro laser)

It has a somewhat visible beam at night (but cannot be used for stargazing as the beam isn't visible enough).

Runs off 4XAA batteries (one circuit with reed relay) and 2X 9V Batteries (in parallel for the laser).

It will burn (almost instantly) an unmarked match and through text on paper.

Its main feature however is it's 'child proof' and safety technology! I think it is one of the first lasers of its kind to incorporate safety as well as power!

It has a key start, missile launch switch (also emergency stop switch (see video)), & light up push switch (all of which have to be on before laser will work)

It also has 3 indicator lights to show when the laser is powered up.

Pics below. (if vids will actually upload I will say sorry now for terrible quality, but its good enough for you to get the gist...)

SMIDSY · Mar 11, 2008

Re: My first DIY ~100mW 650nm Burning Laser

Beam shot when it was slightly foggy outside (no overexposure)

sorry for pic sizes I only have my camera phone at the mo.

SMIDSY · Mar 11, 2008

Re: My first DIY ~100mW 650nm Burning Laser

Into the lens shot- I think this is one of he nicest shots I have ever seen like this

download it to see it as it should be

SMIDSY · Mar 11, 2008

Re: My first DIY ~100mW 650nm Burning Laser

All indicator lights on (see vids for more details)

SMIDSY · Mar 11, 2008

Re: My first DIY ~100mW 650nm Burning Laser

Videos -they are .3gp format should work with WMP as well as Quicktime (sorry about format as I said I only have my phone at the moment)

NB if you think all the switches are a waste of time please look at the vid- it makes clear why the are there.

NB2 the laser will only work when all 3 lights are ON.

pwnstar · Mar 11, 2008

Re: My first DIY ~100mW 650nm Burning Laser

yea wow, first when i saw the pics i thought all of those lights and fancy switchs were very unnecessary.
but the video made it look really nice!

where did u buy the key start?

SMIDSY · Mar 11, 2008

Re: My first DIY ~100mW 650nm Burning Laser

pwnstar said:
yea wow, first when i saw the pics i thought all of those lights and fancy switchs were very unnecessary.
but the video made it look really nice!

where did u buy the key start?

cheers, I was really worried people would laugh...

I think this is really quite necessary as I have some very young siblings who I don't want to get blinded by my laser lying around the house.

And parents too lol ;D generally if they see something with a missile launch switch and key start they leave it alone

Key start switch is from Maplin (UK). I think it was around £1.50 (not incl del.)

jake21 · Mar 11, 2008

Re: First childproof (safe)~100mW 650nm Burning La

i made a key switch on one of my flash lights they work out great

clwatkins10 · Mar 11, 2008

Re: First ever childproof Burning Laser? ~10

i like it, nicer than i thought it would be

MarioMaster · Mar 11, 2008

Re: First ever childproof Burning Laser? ~10

key switches are great, i would've gotten a few at the local computer show but the guy wanted $6 each

SMIDSY · Mar 12, 2008

Re: First ever childproof Burning Laser? ~100mW

Yeah key switches are quite expensive... but I think it adds something...

nothing says dont touch me than a big key switch

did you see the vids?

Dark_Horse · Mar 12, 2008

Re: First ever childproof Burning Laser? ~100mW

If anyone is interested in "key-switches" I have bought some from these guys, they seam to work well:
http://www.goldmine-elec-products.com/products.asp?dept=1188
They also have some really small 10uf Tant Caps, among other odd "must-haves"
Dark Horse

SMIDSY · Mar 12, 2008

Re: First ever childproof Burning Laser? ~10

was asked to show another view so here you are:

Benm · Mar 13, 2008

Re: First ever childproof Burning Laser? ~100mW

It think all the safeties are overkill really, and apparently using up a lot of power as well - the laser itself could be powered from the 4 AA's without a hitch.

As a safety any decent keyswitch would suffice as long as you dont let the key lay around. They can obviously be bypassed easily by anyone with some technical skill, but so can any other protection mechanism.

Switch · Mar 13, 2008

Re: First ever childproof Burning Laser? ~100mW

Have to say it looks really cool, and your work on it is very clean (well on the outside anyway, didn't see the inside).Lol , with all that stuff it looks way more dangerous than it really is,I would be afraid to turn it on

.But I have to say, just the key switch would suffice, I bet children know how to push a button a and flip a switch

And if you want it to be hard to bypass you could put it all in a heavy metal box with a lock and a key switch ;D

SMIDSY · Mar 13, 2008

Re: First ever childproof Burning Laser? ~10

Benm said:
It think all the safeties are overkill really, and apparently using up a lot of power as well - the laser itself could be powered from the 4 AA's without a hitch.

As a safety any decent keyswitch would suffice as long as you dont let the key lay around. They can obviously be bypassed easily by anyone with some technical skill, but so can any other protection mechanism.

It is over kill but I worn with the principle-
If its worth doing its worth overdoing!

Its also not using up much power at all, its 2 leds, I have so many batteries because I dont want to replace them regularly

First ever childproof Burning Laser? ~100mW

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