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A 5mW 445 is going to look very very dim - but you can get some nice single-mode diodes of this wavelength. I've got an Osram PLT450B which is nice running at around 100mW (but can be driven much much lower if needs be). Jordan (DTR) sells a similar diode in a 5.6mm package (Osram PLT5 450B).

They're good enough for most jobs, and replace and exceed analog scopes in many ways (single pulse triggering & display, all storage features, capture, decoding, being small enough to not take up the whole bench etc.). Much more comprehensive measurement tool than an analog scope, and the...

Most of them no longer have connected phones in them. Some have been converted to charging stations for people to plug their mobile phones into, others have information/noticeboards inside. The main reason the red ones still exist is for the tourists - but many have been converted into ad-space...

There was an artist/sculptor who did a funny one with them in Kingston-upon-Thames slightly upstream from where you are now... Out of Order (1989) by David Mach. Most of them outside of London are being repurposed now though - There's one in Bath that was painted ambulance yellow and had a...

Wrong part of the country :) It's most often spotted in Cardiff not London!

OP's not followed their drawing correctly as far as I can tell from the picture - the 3.9 ohm resistor is not connected between the Adj and Vout pins but from Vout to ground.

A shunt resistor is just a normal resistor being used for the purpose of measuring the current in a given circuit.

Oh hang on a second - You can't measure the current on your multimeter in the current mode with a Shunt resistor! You should measure the voltage drop across that shunt resistor and use I=V/R to calculate the current. This is why 1ohm shunts are ideal - as that way I=V*1 so you needn't calculate...

If only train travel wasn't so damn expensive :P I'd jump on a train with my case of lasers if GWR wasn't going to have £45 for the privilege!

Please don't connect your driver to any more laser diodes before you can properly verify with a meter and test-load that it's working correctly. It's a massive waste of your money if you do this and killing laser diodes is a totally avoidable situation if you've taken the right steps. It's...

This is probably not your issue - but it would definitely help if you got a modern multimeter - It seems that you're pretty new to putting circuits together, so having to factor in the loading of a moving-coil voltmeter into your measurements may not be helping you so much... On to your circuit...

Ah lovely shot of the place where nothing can be agreed :) Are you in the UK for work or leisure Alaskan?

🤞 that the package materialises or the seller gets back to you today.

Eyestrain. Wouldn't be any different if you stared at a lightbulb for a few seconds. Damage is from parallel rays (collimated beams for example) being focused on the retina by the eyeball. This is precisely why "being careful" simply is not good enough. Accidents happen. Indoor, always always...

There's nothing in the latest driver that BSOD'd me when I installed it manually the other day but GeForce Experience is an un-necessary piece of bloat that could well have messed up the install. 🤞 the problem is consigned to that old install of W10 and doesn't return. All the best Curtis.

Glad you're getting along with it okay :) Fan was loud for me as I was trying to use it in a lab that did double-duty as a silent study area!

Oh I definitely agree - a website that's not using proper HTTPS/SSL with valid certificates should never be given payment info. But it's also pretty straightforward to set up, so even the laziest of scam artists could. Heck my awful personal site has a valid certificate and I know next to...

They're "trusted" in the sense that they aren't a scam - but if you ask around you'll get mixed comments from different members. The lasers they sell are slightly marked up common cheap chinese made units, and their Laser Power Meters are uncalibrated and effectively useless. They're not going...

And another of us chiming in - Welcome Paul, Enjoy your stay!

"max output 50000mw" I can pretty categorically say you do NOT have a 50W laser in your hands. It's a mass-produced commonly avaliable chinese-made laser, and will likely be somewhere in the range of <1W to 2-3 if you're lucky. 5W lasers aren't possible to make, let alone sell for a profit for...