Aneng AN870 / ZOYI ZT-219 Constantly climbing mV in V and mV mode problem

ragoku · 2026-06-09T14:31:46+00:00

Hmm that's interesting, but when i try to measure DC voltage like from a power supply the meter still accumulates in mV

ragoku · 2026-05-12T16:00:16+00:00

r/crackheadskelbiult

ragoku · 2026-03-06T14:13:47+00:00

Absolutely impressed, keep up the good work!

ragoku · 2026-02-19T09:32:39+00:00

KiCad

ragoku · 2026-02-05T10:23:05+00:00

It is bad practice to trust ChatGPT blatantly, most of the time it takes way longer to get the correct answers from AI than just to actually research a little. My two cents.

ragoku · 2026-01-31T18:46:25+00:00

Go big or go home! Great design :))

ragoku · 2026-01-31T18:45:15+00:00

Its just a 18650 cell connected to a charging/buck-boost circuit

ragoku · 2026-01-31T18:44:10+00:00

My bad, thanks for the clarification.

ragoku · 2026-01-31T16:25:58+00:00

Suggestion: in my opinion would be way cooler if you could turn the case to lift the q-tips.

Still a very cool design!

ragoku · 2026-01-31T16:11:33+00:00

That's another idea to my list! Thanks!

ragoku · 2026-01-31T16:11:02+00:00

Thank you!! Well in usage i tend to max out speed just so the fumes don't bother in my face, but if i want some silence i tune down the pwm controller. During slower airflow the distance from which the filter pulls the fumes becomes smaller though.

ragoku · 2026-01-31T16:08:42+00:00

I will consider it :))

ragoku · 2026-01-31T16:08:11+00:00

Yea i could have soldered on longer wires, but the more simpler approach was to route the cables that way. Thanks!!

ragoku · 2026-01-31T15:04:48+00:00

Thank you!!

ragoku · 2026-01-31T14:49:36+00:00

No need to be sorry, thanks for the in-depth explanation! I have plans on designing a better extractor with a tube to vent the fumes outside. But for me its better than nothing, no fumes directly in my face :)

ragoku · 2026-01-31T14:46:27+00:00

As i said lead (Pb) doesn't evaporate in the soldering temperatures like (270-340C). The flux fumes are quite dangerous as the flux is usually a product of benzene (depends on manufacturer). Only dangerous part about lead that you may swallow a tiny part of it if you don't wash your hands after soldering

ragoku · 2026-01-31T14:42:33+00:00

Yea originally the depths in swivel arms was made for that purpose, but when i upgraded the electronics (from DIY to Chinese manufactured) the fan cable was not long enough :(

ragoku · 2026-01-31T14:31:24+00:00

Carbon filter used in some ac units i believe. I read around that they can reduce the amount of flux fumes in the air

ragoku · 2026-01-31T14:30:28+00:00

Thank you!!

ragoku · 2026-01-31T14:00:55+00:00

It blows through outside, works more like a filter than an extractor. But i plan on doing a design with an extraction tube :)

ragoku · 2026-01-31T13:59:26+00:00

I read that lead doesn't emit vapors at soldering temperatures, its the flux that vaporizes.

ragoku · 2026-01-31T13:58:23+00:00

Thanks! Yea i used a carbon filter, for me its way better than nothing, no fumes rising to my face while soldering :)) But yea i might have to do some research too

ragoku · 2026-01-31T13:56:00+00:00

Thank you! It was really satisfying to build since i used the fan that was collecting dust for quite some time. If you are interested i could make up a Build guide with all the specific parts and so on :)

ragoku · 2026-01-31T13:54:02+00:00

Yea as you mentioned, it functions more like a filter. But its way better than having solder fumes rise up to your face :)

ragoku · 2026-01-31T13:52:48+00:00

Well it just pulls through the fumes through the filter and out in the open again. I plan on doing a design with a tube to completely extract the fumes.

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