Addicted to data? $10 USB car charger with a voltmeter


#1

Originally published at: http://boingboing.net/2017/01/25/addicted-to-data-10-usb-car.html


#2

A voltmeter ought to built into anything with a battery, such as your VW camper. I built one into my Loud Bike. They can be had for $4 from China via Ebay.


#3

Or:


#4

plus it’ll show you the voltage drop when you’re pulling pulling 8 amps across the 14 gauge cigar lighter circuit :open_mouth:


#5

So it’s a milliammeter too? Nice.

I always thought there should be cheap meters you could put between the wall plug and a device to show how much power it was using. They could save the info for you. (At the time I first thought of them, this wasn’t really an option, unless you wanted it to print it on paper.) I think I’d prefer that to having it transmit the info. Too many “things” are squealing on me already.


#6

Surely a label, or color coding, or a robot monkey that starts clanging cymbals when the wrong plug is used could prevent this?


#7

Not with a 9-year-old.


#8

Maybe make her (?) push start it the next time she drains the battery?


#9

Not with a 9-year-old.


#10

wait 'til they’re 15, draining the starting battery will be a welcome relief.


#11

I’d wire one one (and an Oil Pressure sensor) if I had anyplace that looked OK to mount extra gauges in the Vanagon. This just goes in the lighter socket and all is well.

Someday I’d like to build that out.


#12

as my then-6-year-old once made crystal clear:
My in-dash 6 CD changer hungers - HUNGERS I TELL YOU - for the taste of random coins that would have otherwise been simply thrown out the window (at a toll collection point)


#13

For me its the cigarette lighter socket which is mounted vertically in my wife’s Jetta, and is right beside the ash tray. I threw the lighter away and we throw coins in the ash tray. The resulting accidental short circuit blew something up in the VW’s electrical system without blowing a fuse. Cost quite a bit to repair.

Now I have a USB power supply permanently installed in that socket.


#14

At around 2 she fed a $1 bill into the DVD-R on my iMac.


#15

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