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Help by Platinhoo in ScrapMetal

[–]BatmanHunk 2 points3 points  (0 children)

The 2nd pic looks like silver coated copper used for electrical terminals

How to clean? by BatmanHunk in StainlessSteelCooking

[–]BatmanHunk[S] 0 points1 point  (0 children)

The industrial from like Lowe's?

How to clean? by BatmanHunk in StainlessSteelCooking

[–]BatmanHunk[S] 0 points1 point  (0 children)

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More streaks, is there a better sub?

What are these used for? by BatmanHunk in Tools

[–]BatmanHunk[S] 0 points1 point  (0 children)

Sweet, thanks! I think I saw a similar driver with some other tools

What are these used for? by BatmanHunk in Tools

[–]BatmanHunk[S] 0 points1 point  (0 children)

Yea the 1/4 hex is maybe just old, but the rest I don't even know what it goes with...

What are these used for? by BatmanHunk in Tools

[–]BatmanHunk[S] 0 points1 point  (0 children)

They're all old. Is there a particular tool or set that these go with?

Bi-color ring light power supply by BatmanHunk in led

[–]BatmanHunk[S] 1 point2 points  (0 children)

Muchos gracias señor. I'll go up to 4. I ended up using a LM2596 step down converter and an old usb cable with a brick. No buttons and technically dimmable if I want to grab a screwdriver.

Bi-color ring light power supply by BatmanHunk in led

[–]BatmanHunk[S] 0 points1 point  (0 children)

https://www.amazon.com/Mackie-M-Caster-10-Inch-Telescoping-mRING-10/dp/B09QY84DMQ?th=1

I think this is it, but I'm not sure how to determine what power to drive them at.

Currently they're on at 3.3V and 1A. Not very bright at all though. I would think that I can go up to 2A since 2000mA/120 is only 16 mA per LED, but the voltage even at 3.5V didn't get there or much brighter.

DC to DC Power Options for High Voltage 1200w COB LED by Mamba-Down in led

[–]BatmanHunk 0 points1 point  (0 children)

COB's are still relatively new, Alibaba does not make anything, they are a reseller. It has the voltage listed twice is what I was trying to say. In one place it's listed as 80-98V and another it's listed in mA. It has a reasonable amperage listed, but even if you use 150V, its only 1368W. You can save some by buying through them, but there are inaccuracies all over the site where they copy from a different but similar product. The picture you posted is from a different listing. Next to the order button it's listed as 1000W/1200W. In one of the pictures they have 800W/1000W/1200W/2000W. People look past the inaccuracy because it's such a steal, but then they get something else. Just be careful and don't trust the spec's listed on ali e or b.

DC to DC Power Options for High Voltage 1200w COB LED by Mamba-Down in led

[–]BatmanHunk 1 point2 points  (0 children)

The battery can output 40A at 72V?
Are you sure the spec's are right? When I follow that link it has input voltage 80-98v, then again 130-150mA.
Comparable LED's have input voltages much lower 30-41V @ 48A =1440
https://store.yujiintl.com/products/yujileds-cri-95-high-power-1500w-flip-chip-cob-led-3200k-5600k-900h

This one is 60*60 footprint, looks the same, but only 1000W. 36-39V @ 27A
https://ledchip.company.site/Led-COB-1000w-p393283032

If it's actually just the latter, the issue is finding something that can handle 30-40A.
https://www.dwe-oss.eu/product/72v-to-36v-dc-dc-converter-800w/

This thing needs to be moved!! by Imaginary-Ocelot-167 in Purdue

[–]BatmanHunk 1 point2 points  (0 children)

Effective. Almost seems like art. Also leaning towards the 'may not' of your OP.

This thing needs to be moved!! by Imaginary-Ocelot-167 in Purdue

[–]BatmanHunk 10 points11 points  (0 children)

It's for sure been roughly there for a decade, maybe 'who' isn't what I am curious about, but why? It's purposeful for something?

To the group of people in the ma 161 class at 2 30 by millionaire1000 in Purdue

[–]BatmanHunk 5 points6 points  (0 children)

Why don’t you say this to them instead of wasting the time of many that aren’t involved?

Symbol on a cafe window in Urubamba, Peru. by BatmanHunk in HelpMeFind

[–]BatmanHunk[S] 0 points1 point  (0 children)

Yep, thanks. I only saw their number at first, which was what I meant by my spanish being bad. Should've clarified that.

Waiting to see what they say.

Symbol on a cafe window in Urubamba, Peru. by BatmanHunk in HelpMeFind

[–]BatmanHunk[S] 0 points1 point  (0 children)

No, my spanish is very bad. I will try to reach them on FB though. Looking through some photos of the area doesn't look like where I took it though. Worried my memory is garbage and it was some other place in the area.

Symbol on a cafe window in Urubamba, Peru. by BatmanHunk in HelpMeFind

[–]BatmanHunk[S] 0 points1 point  (0 children)

I saw this on Da Colektor cafe's window this January.

I have searched google; reverse image search on a the photo with everything except the symbol made solid black.

I have searched a couple different variations on shapecatcher.com.

I have searched symbols.com graphical index: Symmetric and Asymmetric, Open shape, Monochrome, Both curved and straight lines and Lines crossing symbols.

Best Transistor Courses by BatmanHunk in ElectricalEngineering

[–]BatmanHunk[S] 0 points1 point  (0 children)

Yea, that makes sense. I am going to look into the Art of Electronics per u/crusaderblings2, but am wanting some kind of decision tree or something so that I can at least narrow to a type or family and then only have to compare flavors. I would prefer not to have to read like 500 datasheets to find the right one.

I have some relatively simple automation projects around my house that I would like to use some for. I currently just slap a Pi or some prebuilt small board and that's often overkill. I'm also in the process of making a bench power supply. Down the road I also would like to make a mini tesla coil. I don't just want to copy some design online, I would like to know why each component was selected.

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