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Tech Spam thread - because 1/4" BSP gets 5 hand spans to the jiggawatt

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Dissolve rust/iron in vinegar? The acetic acid shouldn't be able to get through the aluminium oxide skin (test on something equiv to check first!). I've seen a vid where a guy was doing this to free broken studs from an alloy block, just can't find the link at the mo sorry.

https://en.wikipedia.org/wiki/Acetic_acid#Reactions_with_inorganic_compounds

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hey guys I have a couple of 2 wire DC motors I want to get plugs for, so they can be removed easily. I have tried bullet connectors but they just arent up to the task, and this isnt being fitted into a car so not really suitable. Whats the next step up in plugs, something screw together? Its for 24V 15A

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I don't know how big the motor is, but the Dean's connectors used by RC cars can do 50a continuous 

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My driving recorder wont stay recording, its the 3rd one I have tested and also different makes, I think some kind of voltage surge or drop is causing it? 

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Do you have tons of old cellphones or some supercap/ultracap's around?  Could make a voltage stabilizer thing.  I have a few shitty zener diodes but i don't like that method.

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50 minutes ago, Ghostchips said:

Do you have tons of old cellphones or some supercap/ultracap's around?  Could make a voltage stabilizer thing.  I have a few shitty zener diodes but i don't like that method.

I dont know much about this topic, could I use one of those capacitors for subwoffers? I have a huge zener diode here 

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Does anyone know how I could convert a piezo-electric signal into somethin a control unit would see as either high or low input?
The pieze has around 1V AC, and the control unit wants either 12V DC, or ground as it's input? I have tried using a transistor to pull the control unit to ground, but that was unsuccessful

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On 23/08/2019 at 20:16, SOHC said:

I dont know much about this topic, could I use one of those capacitors for subwoffers? I have a huge zener diode here 

Build that tiny voltage supply & use the huge subwoofer cap on the output supply.  It's what i've been going with something.

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9 hours ago, Yowzer said:

You could also fix the alternator?

nothings wrong with it

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Sure about that? A multimeter won't necessarily tell you if it's dropped a winding and will still read 13-14v, but the AC fluctuations can mess with switchmode supplies like the powerpack for the camera

Turning on the headlights will drop the peak voltage, leveling it out with the battery float voltage and stop the powerpack freaking out as much. A capacitor will only mask the issue.

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