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Yeah I looked up ones with discrete components because I didn't feel like waiting for shipping again and i knew i had those parts around. and the zener is under the blue resistor.

Ha ha! The protection circuit works great! Time for some pics. The soldered circuit on a solderable breadboard Testing, it works! I also discovered I REALLY need a bigger work area.

Oh man i just realised i'm going to need a crazy dummy load for this when i calibrate the driver since its going to be powering a 100W LED lamp at 30-36V. I only have experience with making RF dummy loads and from a quick glance at google one for something like this is a lot different. Looks...

Well in my search through my parts i didn't have the transistor i needed and the local electronics shop doesn't have them, but i did find some IRF510s and a bunch of 2N2906s and a 3.7V zener which I was able to make this circuit with Which worked great, I should be able to replace that zener...

Well time to dig through my parts and see if i got that transistor. I know i have some darlington transistors somewhere in my mess of parts, just don't know what ones.

I'm a trained wireless communications/electronics technician, but I can't design for shit. If I have a schematic I can make a PCB from it and build it or fix it. Although it's been a couple years since I've had to use those skills. Its going to power a high wattage LED lamp driver.

I went with steel because I don't have the means to weld aluminum. Found a piece of steel tubing and welded a steel plate on the back, grinded it smooth and painted it with black acrylic paint that dried matte. I had a 2.2W 445nm laser around 40cm away shooting into it for a full minute and...

Anyone got a schematic for a simple low voltage shutoff? I have a project I'll be building soon that uses 4 18650 unprotected batteries and I want a small circuit to stop the battery pack from going below 12V so they don't get damaged. The circuit it will be powering will be drawing around 3.5A...

good news, they are sending me a new battery!

Cool. I picked up a pair. I got another question not about goggles. What kind of non-reflective surfaces can I aim a 2.2W 445nm laser at relatively close distances for when I want to take a longer exposure picture. This thing seems to burn even white walls from over 10 feet after a few seconds...

What what I can tell imports into Canada are still fine, right?

Re: Question about these safety goggles. I live in Canada so I can't order from there. Any place else i can get them?

Re: Question about these safety goggles. Ok after having fun with my blue laser i went and ordered a high power red one. I've also decided to go with a bit better goggles since I have a feeling I'm going to end up going deep with this hobby. Are there such thing as goggles that protect from...

It's not down because of it I bought 4 batteries, but it means I can't have 2 charging while I use 2 in the laser.

I still haven't heard back from them about my dead battery :\. I've even gotten a replacement DMM and tested the battery. It just registers as 0 volts so matter what I do so the battery is for sure DoA.

Yeh that would be nice, but i live in canada, getting anything shipped here thats not already in canada ends up costing more than what I'm buying. thats why I'm looking at things I already have around.

Just building it for fun/showing my brother that those chinese flashlights he keeps buying on ebay are not even close to the lumens they say :P

It's just the one that came with my AMD FX 8320. I've never use the ones that come with the processors I buy.

oh, so would one of stock heatsinks that come with any processor you buy work just fine too?

I'm sourcing the parts for a build using a 100W LED panel and I'm wondering if this CPU heatsink will work since I have this one laying around. Cooler Master: Hyper 212 EVO If it does work it would be nice since I can mount 2 120mm fans on it easily.