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That's a bit like saying "If I bend my knee just a bit in a direction it's not meant to bend, it can't be painful"... An IR diode should be more rugged than others, so it'll probably survive. It's yours anyway.

Just for clarification, the assumption here is that you measure the current not directly with a DMM on A setting in the circuit, but indirectly by measuring the voltage drop over a resistor in the circuit. If you have 100mA flowing through a 1 Ohm resistor, you'd measure 100mV, so you've got a...

Can you dim it continuously? Does it have an ultra-low mode which gives light for a week (yet is bright enough for finding your way in darkness)? Does it have a lock-out capability? Does it have underdischarge protection for various types of rechargeable batteries? Does it.... never mind; it's...

nice link! Original sales thread in CPFM - now with clip!

In case someone wants a really good (and not just quite good and quite cheap) 1xCR123A flashlight: the one which I selected after a lot of research and time spent on Candlepowerforums and other places is the Liteflux LF3XT, available e.g. from kaidomain. If programming is your thing, get it!

Somebody here confuses power and energy :oops:

Just when I tried to submit my reply, the server went down... Possibly yes. Laser diodes may have low voltages for the maximum permissible reverse voltage. I've checked the datasheet for a 635nm diode which had 2V max here, which was less than the normal operating forward voltage. Better use...

Offended? Why would anyone be offended? But this "poll" (not yours, the one which resulted in this list) is pure marketing push for the feeble-minded masses, no need to support that sort of thing in any way.

It's you making a V sign; and a nice example of additive color mixing :yh:

Hm, I'm a bit confused now. I've always classed niko as being the beta male trying to oust T_J from his alpha position, but it appears he (niko) thinks he's completely different? That tells you how tricky that bit with interior and exterior perception is. Oh well. Going to sleep now.

Actually the point of the prisms is to turn the image right-side-up.

I'm with ElektroFreak on this one. TJ definitely was aiming to be the undisputed top forum troll, trying so hard that it was quite touching... I too wondered for a while whether TJ could have engineered that "banned" label, it would be his style.

TTL = Transistor-transistor-logic. It's used in a system of digital logic ICs that uses +5V for "hi", "1", "true" or "yes" and 0V for "lo", "0", "false" or "no". TTL modulation means you can switch the device (laser) on & off by applying either 5V or 0V to an input pin (actually everything...

Looks like "banned" just means banned for posting, he shows as "online". Maybe it's an automatic ban after getting too many neg rep points in a short while? He should have gotten a notification explaining the reason in any case (I'd guess).

It's common practice to sand the tops of ICs (remove the labeling) to hide what's inside. You can read something on the ICs, but googling these letters and numbers didn't turn up anything useful.

I couldn't do more than guess...

It's most likely not similar to a green driver. There's an inductance on the board, so it appears to be a boost driver (voltage step-up). It's a shame these chinese resellers don't supply proper technical information, no way to tell what this might be useful for...

Sure, the people designing these ICs sure don't know what they're doing... I'm off.

Having microamperes in non-high-resistance environments, let's say 1Ohm, means you're talking microvolts as well... and thus picowatts. You're not going to measure that with any instrument available to the public. So, you're saying that using an ammeter with a 1 Ohm internal resistance will...

Currents in the microampere range only flow in high-resistance environments, so in this case even a resistance of one kOhm would be insignificant. You grossly overestimate the internal resistance of moving-coil instruments. Even the large types used in school (Phywe) drop .1V at full scale...