Reddit:Electronics

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I have bought brand new computer since I began to use it, it was malfunctioning and now it has completely broke down I needed to put it into repair shop ( After 6 months of using ). The next thing was my phone it started randomly increasing and decreasing it's volume when I was only holding it in my hands. Also I wasn't able to turn it off many times. This is happening with majority of electronics when I work with them. Is there any explanation why this is happening?

My end goal is to create a table that slowly rotates under a uv lamp for resin curing, I have a surplus access to small dc motors and cables I can splice for wall plugs and I’m trying to avoid burning batteries for this, but I don’t know anything about motors or electricity?

My end goal is to create a table that slowly rotates under a uv lamp for resin curing, I have a surplus access to small dc motors and cables I can splice for wall plugs and I’m trying to avoid burning batteries for this, but I don’t know anything about motors or electricity?

My wife bought a pair of cheap decorative oil lamp things online with LED flickery flame candles in them. Cute, but the three LR44 cells in there weren't destined to last long so I figured I'd try to fit something better in there instead. So I got a couple of lithium batteries and charger boards. The boards were TP4056 based chargers but rated at 1A, too high for the 500mAh cell I was using. So I had to change the charging resistor. That was the fiddly bit, 0.5mm pencil for scale. That's an 0402 resistor.

Anyway, that went well, ended up with a charging current of 48mA so I set to work on converting the lights.

This was the original base plate, LR44s inside the holder. very dodgy looking cells. Popped off the bottom, and it couldn't have been simpler inside. I guess all the clever flickering circuitry is inside the LED itself. That's good, I don't have to worry about it relying on the internal resistance of the LR44s if there's circuitry in there.

So, I opened up the hole a little for access to the charging port, shoved the board in there, Stuck in in place with hot glue, along with the lithium cell, connected the LED using the original switch, and yay, all is well.

And as a bonus, the charging LED is visible through the plastic.

I very new to electronics thing. Not sure what I’m doing wrong I follow this diagram and my motor still doesn’t work.

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