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Volume control for chinese lightsaber

I’ve got a cheap chinese lightsaber and want to make some adjustments to it. The item looks great but its volume is too loud and my neighbours get mad when I switch it on. It doesn’t have any way to control it. I contacted the seller and confirmed that there was no internal control. I’m […]

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Lithium ion tool battery charging from a solar panel

I am using two Lithium ion tool batteries (18V) in series to get a 36 V line. I have opened one of the batteries and it is use the BM3451 chip to manage the charge/discharge of the cells. The battery is made of three parallel Lithium cells in a five string series. The configuration seems […]

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What kind of inductor for EMC filter?

I’m looking at the datasheets for a number of switching DC-DC converters. They suggest for EMC filtering to add an inductor and a capacitor or two on the input side of the converter. The question: what kind of inductors are required? How critical are the values? I’m not after product recommendation, I’m after clarification of […]

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Ask Health Medical

If one is on keto could they just not starve and let the body feed on the stored fats around the body?

Genuine question as I don’t know the scientific reason. The ketogenic diet is all about forcing your body to metabolise fat instead of carbs. Once you’re in ketosis you continue to eat a higher ratio fat in your diet. A friend asked me why not eat anything at all since your body has the fat […]

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Android User Help

Changes are not effected after full AB OTA update

I have changed settings application version number for testing AP OTA update and created OTA zip file. From command (“update_engine_client”) have done OTA update. snipped below log: INFO:update_attempter_android.cc(469)] Processing Done. INFO:update_attempter_android.cc(477)] Update successfully applied, waiting to reboot. Rebooted manually.But settings application version number is not changed. Could you please help me, where I have done […]

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Mastering Development Software

I have a simple question about TRIGGERS in SQL

I really did not understand the issue of Trigger, and I would be very happy if you help me. It is really important to me. Please can you solve third and fourth questions?

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Ask Chemistry

Chromatography course I stuck on SPE question?

I need to fill this scheme but since corona outbreak we couldn’t get an online course. I don’t have enough resource to learn so i stuck on this question. Would you help me to fill it ? if you could , can you explain solvation ?

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User Help

Have Firefox to open profile without complaining

I’m doing some backups from an old computer. I want to open the Firefox pointing to an old profile, just to have a glance at it to see if there’s anything I want to save or delete. In particular I’d like to recover digital certificates if any (I can’t remember if I had any there) […]

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User Help

Choose tesseract language when doing batch OCR with SubtitleEdit

I’m using Subtitle Edit on Arch Linux to convert some VobSubs (.idx+.sub) to SubRips (.srt). To do batch conversion I can use this command line: subtitleedit /convert 01.eng.sub subrip This will produce a 01.eng.srt created by operating an OCR with tesseract, by default. It takes quite some time, but I’ve got a perfect result in […]

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User Help

Possible infection: A LOT of TCP connections to all devices on my network

Today I seen one laptop with windows 7 in my house trying A LOT of TCP connections (like 6 attempts for second for about two minutes) to another devices on my network, including my router. Some of the ports that it tried to connect: 21, 22 ,23, 69, 80, 139, 443, 445, 554, 1900, 2869, […]