Ok, this is my first build; as pathetic as it may seem, a weak red laser, probably less than 1mw. However my heart is somewhat touched from building this so and I just thought i'd share for the fun of it.
For your next one, what about a PHR803T or LPC826. They are relatively cheap to build in eg a C6 and they make good practice for the more expensive diodes.:beer:
Edit: Just a thought, those modules are usually rated for around 5 V. If you run them at higher voltages, they can get hot fast and you may end up frying something. Have you tried a single lithium or 2 x AA's?
To be honest, this wasn't anticipated, I had already a 300mw and c6 host and driver ordered, but I was getting a little restless so I took out the soldering iron.
And yeah I knew a 9V battery was a bit high for a 5mw diode, thats why I added a resistor into the circuit.