Recent content by catdog

It was on ebay, although the seller is no longer registered. I'm pretty sure that it is the same one as sold by dealextreme

The easiest way to remove the diode from the mounting bracket is to hold the bracket on either side using two pairs of pliers, and twist them in opposite directions. The bracket will bend quite easily, and the diode will just fall out without you even touching it! To push it into the aixiz...

Thanks guys! rog8811 - I appreciate that a regulated circuit is always going to be better, but given the choice I wanted mine to be as small as possible! On saying that, your case looks pretty nice :) yobresal - I didn't connect up the diode until it was in the aixiz module this time, but the...

Some shots of it in action: LEDs running Bluray laser running Beam shot in clean air Drawing a line across a "glow in the dark" star

To focus the laser, tape the batteries together and connect them to the PCB (make sure they are around the correct way!). Once focused I put a small piece of tape on the aixiz module to stop it from moving. Drill out the plastic head to 6.5mm Insert the laser into the head, and solder the LED...

Solder the GND pin (and the one next to it which is the Red laser) to the underside of the PCB. Solder the Bluray +ve to the top of the PCB as shown. The other pins should not touch the solder around it. I soldered the other (photodiode) pin to the small area of copper which is no longer...

Remove the PCB from the PS3 laser, then remove the laser from the assembly. Remove the laser diode from the Aixiz housing and insert the bluray laser in its place.

As promised, internal photos.  This version keeps the LEDs intact. Ingredients: - Aluminium LED keychain (5 LED and Laser) - Mini Aixiz module (6mm) - PS3 Laser assembly - Resistor Disassemble the LED keychain and make a cut as shown

Current = (battery voltage - diode voltage) / resistance = (9V - 5V) / 150 Ohm = 27 mA

First off guys, don't get me wrong - there are better ways to drive a laser than just a resistor and a battery, but my point is that it will work just fine.  The problem I have is the hatred for this guy kipkay, with a knee jerk reaction to criticise his tutorial whether it is justified or not...

Care to prove this? even at 9.5V it would only be 30mA, so it isnt going to kill the diode. I'm not trying to say that a resistor is the best way of doing it, but I am saying it will work fine so long as you dont mind it dimming as the battery goes flat.

Personally I don't see any problem with his instructions to use a resistor and a 9V battery.  Yes, the output will drop as the battery goes flat.  Yes, proper current regulation would be a much better option.  But a resistor is simple.  With 150 Ohms the current is only 27mA, so the diode is not...

My Blurays arrived today and were very well packaged - thanks Daedal Now for the fun part, turning them into a pointer :)

Re: CR123A housing awaits blue ray. In the 7805 current regulator configuration shown above, the circuit will operate exactly the same as a 317 however the reference voltage will be increased from 1.25V to 5V.  This is a bad thing as it requires an additional 3.75V from the batteries.  So no...

Re: CR123A housing awaits blue ray. I cant say I have ever seen a 7805 used as a current regulator before - with the simple reason being that the lm317 does a better job I guess: Voltage across bluray diode: 4.5-5.5V Voltage drop across 7805: 1.7V Voltage drop across resistor: 5V...