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Yep still looks like a good deal... hoping they DO come at spec or better. I'd love to add a laser to my arsenal that is pre built. (done nothing but custom everything so far) Plus all those goodies that come with em! I think that even shipping everything to one place and then paying an...

I'd be happy to use PayPal, otherwise I'm probably out... "PROBABLY" but not definitely. :) I might could take a risk for at least the cheaper red one... just so I can have a 635 and the cool stash it comes with. If PayPal is a go, I'm going to try to rack as much cash I can together to get a...

Re: FEELER: Rifle Host Group Buy I"m definitely interested in at the VERY least the 100mw 635 for $35. What a steal with those accessories! Even the 1W 445 for $88 is a fantastic deal! I might pick up a couple of those! Need to run some numbers and check on some stuff but I'll be watching if...

Consider it a Father's Day present from me to me! Which is why I like to use all methods (ammeter in series, volts across load, volts across 1ohm). I like to be as thorough as I can - measure 3 times cut once - idea. And this is precisely why I ask questions when in doubt. I think I...

Related to measuring across the dummy load: Because the voltage drop of a resistor varies depending on how much current you’re driving, setting the load to 4* 1N5xxx diodes may not exactly be accurate if you are pushing say 3 Amps through the circuit… unless I’m understanding this wrong...

Guess it's time to get them all spectrod! So... what's the exact magic wavelength again? :D

BB, thanks for reminding me of the dummy's purpose. For safety sake and not wanting to kill any diodes, I will be using both methods to make sure I'm not missing something. You are right, if you are putting on all those diodes, adding that resistor is pretty easy, and it's hard (for me) to...

Yep you're right. I just shorted it with the ammeter and it gave me exactly what I was looking for. I've always liked using a dummy load... mostly because I still feel like a beginner in building my own drivers... and partially I guess was because it gave me something else to build myself! :)...

Sorry, one more question... regarding the dummy load for the M140. I know from the many other threads that you test the 445nm diode with 4 diodes instead of 6 because the 1Ohm resistor drops the rest to the 4-4.5V. I have a constant current/voltage source set at 4.7V and 1.57A. When I measure...

This case even may not suffer too much; I've read and seen the graphs where M140s can be pressed fairly easily over 1.8A with proper cooling... but... when I build another one at 2.0A or when I build my first S06J, this will be very important! I'm going to modify my dummy load to have hookups...

I believe you are right. The difference is proportionally about the same when testing on higher and lower currents last night. If the ammeter is less prone to error, why do we have so many dummy loads that use the "measure V across the resistor" to measure the current? rather than measure the...

This isn't the first driver I've built, so I'm feeling kinda stupid that I have to ask this... I'm building this driver to work on 1.6A to give an M140 a long life. The problem is thus: When DMM is hooked up in series to measure current, it reads 1.43A. When I measure volts across the...

Thankfully, I've only ever killed 2 diodes. Both were crappy things I pulled out of old dvd drives and an old blu-ray player (not even a burner). The red one went up when I was experimenting with my first laser ever... wanted to see how far it would go, so that was on purpose. The 405 from the...

hahaha they do look kinda tasty. :) If glow in the dark had a flavor, I bet it would be delicious.

Re: Laser Shirts Round 3 - ORDER NOW! You may change your mind when you get yours :D maybe not... but maybe...

Re: Laser Shirts Round 3 - ORDER NOW! lol the last run I really bugged the printer about all the things we didn't like from the first run (different printer), and one of those things was that the ink didn't seem thick enough. Well... I think he put it on way too thick on the last run... but it...

Re: Laser Shirts Round 3 - ORDER NOW! Awesome! Glad you guys are getting them. Rather impressed they've made it to NYC already!

Re: Laser Shirts Round 3 - ORDER NOW! Shipment scheduled for pickup tomorrow! There are just a couple that haven't given me addresses still... I've sent you a PM.

Re: Laser Shirts Round 3 - ORDER NOW! hahaha Infinitus. I wish that's all I had to write out to get points for my homework... Here are some pics I took tonight, enjoy! The Shirts! Getting a quick UV charge... In a pitch black room. I am really surprised my crappy phone camera picked...

Re: Laser Shirts Round 3 - ORDER NOW! UPDATE: I have the shirts at my house now. :D If I can get my 2 sections of statistics done tonight, I'll post some pictures!