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I've personally never much liked USB scopes - they're convenient if all you do is capture waveforms and traces for documentation etc. but physical knobs and dials are FAR easier to use when you're troubleshooting something. An excellent compromise is a regular scope with data capture options -...

LM317 set up in constant current mode, set at an appropriate limit (30-50mA? pulled this figure out of thin air but it seems reasonable). "Integrated with some microcontroller? What do you mean. Do you want to be able to turn it on and off rapidly (PWM for modulation), or do you want analog...

For your first build, it's definitely recommended to get an off-the-shelf driver - though I'll try and explain here what would happen. You cannot fix the both current AND voltage output of a power supply for a changing load, since these are a function of the load; V=IR, I=V/R So if you have an...

I'm using my scope at work until tomorrow - but I'll measure the spikes later in the week of the boards I've got. Some £8 buck drivers from OdicForce in the UK sold for use with 405 & 455 diodes up from 0-1500mA

Tero said they were paid adverts - not sure if there's a restriction as to how many posts per week etc. probably best to PM him on it...

Oh nice :) Hi from Bristol! There are suppliers in the UK that aren't Ebay - but some of the best suppliers off that platform are in the US. Most forum members who machine hosts aren't here, and the favourites for Diodes, modules etc are all abroad too. As I mentioned, OdicForce does sell a few...

There'd be no need. Just the LM317 as a CC driver would be fine on it's own, No need for a current limit if your driver is regulating the current, as the current is set by the circuit feedback. The voltage will fluctuate if you change the current reference, and as the laser diode heats up but...

I hadn't thought of that - though it's still FAR from ideal, will waste a load of power and will be limited at the current-limit (so not adjustable, or 1.4A) built into whatever 7805 part that m3vuv is using. OPs still better off with a dedicated switching laser driver in my opinion - it will...

I read your title as "laser body-parts", like laser eyes, laser arms and laser legs :ROFLMAO: Thank god for context. Firstly, a 7805 will NOT work well as a laser diode driver. Laser diodes must be driven with constant current drivers, not constant voltage drivers. If you use a constant voltage...

My god that website is a cancerous pile of propagandist nonsense... I don't care about anyone's political opinions about guns (I'm just glad I live in a country where they're not common...) - but NO website should advocate the use of a laser for self defence. That's totally criminal in my view...

So you and FAP are one and the same, Alaskan?

Hello again - thanks for doing proper research after our comments :) 2. Yep - it's initially counter intuitive that a less visible laser would be more dangerous - but if you can see a really bright laser, then people get automatically more cautious. You should be fine safety-wise with a 405nm...

Nah dude - don't get what the record holder got - you can get something that'll suit better for much less money. WickedLasers (the company that makes the record-attempt guy's laser) overcharges and is outperformed by better lasers from other manufacturers. Best for that challenge will be...

It depends what you're after. If you only want to burn some stuff and then when you get bored a few days later, put the laser away in a drawer and forget about it - then buying a quality one from JL or Sanwu is probably overkill. For this goal and this only, get yourself a 405nm (violet) cheapie...

If the chinese sellers actually marked their lasers as Class 3B or Class 4, then customs would seize every one they opened. You are correct that you can't buy anything more than class 2 in the UK, but importing is an option. Your best bet is to get powerful lasers is from quality foreign...

Welcome! Plenty of really experienced members from all parts of the US - and specifically Texas. Glad you did buisness with Rich first, as his work always looks great and it's miles better than getting ripped off on a scam site first! Stay safe (get some good goggles) and I hope you enjoy your...

I've taken to using tiny SMD MOSFETs tacked on as reverse polarity protection in all of my builds where the driver board doesn't have that functionality built in :) Cheap insurance if I forget the orientation of the battery... Either way - it's nice validation for all the members out there that...

If it were just an image, you'd be able to fool the camera with a photograph of your face - so not very secure :) They get away with it as a decent biometric by using the grid of dots to form a 3D scan based on how the pattern deforms across the user's face. You'd need a waxwork of the person's...

Christ that's a lot of damage for such a small tap... You'd have thought that whoever engineered those shelves wouldn't have made them so flimsy though...

Some already do - I know a couple of the "face-scanner" phones like the recent iPhones use a near infra-red VCSEL laser to project a grid of dots onto the users face to aid the camera in scanning it properly!