Home
Artists
Search Recent Random
Posts
Search DMs Popular Hash Lookup Tags Random
Importer
Import FAQ
Register
Partychan Telegram Find&Fuck Waifus ThePornDude
Home Artists Posts Import Register

Temu industrial panel indicators (Patreon)

Published:
2024-05-01 01:04:31
Imported:
2024-05

Content

Maybe the low voltage panel indicators are OK, but the higher voltage 220V ones are a bit too basic for comfort. You can actually smell the resistors in them getting hot very soon after switch-on.

When I first got these I forgot that I had ordered some 220V and some 12V ones at the same time. I ended up testing a 12V one at 240V which was loud. There's a link to a short in the description of this YouTube video, where I relived the moment and blew up another indicator deliberately.

https://youtu.be/DET_bv-sHV4

Files

Temu panel indicators - may need "customised"

I'm a bit perplexed by the fact that the 220V indicator had two resistors in it, but with one literally doing all the work. One resistor is 39K and one is 2K, meaning the 39K resistor is dissipating almost all of the power as heat. For the higher voltage buttons on AC a capacitive dropper would have been a nicer option. The 12V indicator is fine though, although it does push the single LED at around 20mA. I'm not sure I'd recommend these indicators for anything other than home workshop use. The physical construction is nice, but the circuitry has been shaved to the edge. The short where I blew up one of the indicators is here:- https://youtube.com/shorts/79vXZENXCZY If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- https://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty. #ElectronicsCreators

Comments

Frank

"Fulll wave brrridge rectifier-fire-fire!"

Charles

The bare dice diodes are fascinating; you'd think it would reduce the reliability a lot without any protection for them. Are those resistors spot-welded to the leads from the PCB, rather than soldered?

bigclive
>>136824349

The bare diodes are potted under clear resin. The leads are spot welded, but then soldered at the terminals.

N H

I picked up a pack of the 24V models for AC power damber indicators, they work just fine on 5VDC and are just brighter on 18VAC (the latter being common in HVAC)

Carleton Wheeler

How is the power factor calculated? I’m not sure what it means.

bigclive
>>137024243

It's the relationship between the voltage and current waveforms. In a perfect world they would match, but with electronic systems they are often very different.

Gordo

Ahhh, those precious little moments of discovery. While constructing a UV exposure unit for curing 3D resin prints one time, I discovered that Microwave turntable motors come in 30V as well as the 240V variant - a fact I wasn't aware of. They all look the same..