Hey guys! Have you ever heard of the Onewheel?
It's pretty much my favorite thing ever.
In fact as an inventor I would be happy, so happy!
If I invented anything even half as cool as this. Don't believe me?
It's also Adam Savage's favorite thing.
You guys know how much I love the Onewheel.
Wren from Corridor Digital.
This is the Onewheel pretty much the best electric
vehicle that's not a car.
Even Sam one the Gravity jet suit pilots loves Onewheels.
This whole social distancing thing, using a Onewheel is a great way
to destroy boredom and get away from people. I love it.
You know it really sucks? If you're out on a really long ride and
you're running out of juice what do you do? It's it's pretty heavy, so in this video
I'm gonna show you guys how you can recharge your one wheel at an EV charge station.
Now you might remember we recently built a half-scale Cybertruck.
Well, while building this we learned a thing or two. Including the electrical
standard for EV charging. Specifically the SAE-J1772 charge port.
As it turns out this plug actually just puts out - our 40 volts AC,
but it does have a
protection circuit so it's got an extra pin in there that acts as a signal wire
to tell the EV charger whether or not it's safe to put out power to charge your vehicle.
If we can fake that signal wire we can charge our Onewheel using one of these.
Since the Onewheel charger already accepts 100 to 240 volts AC,
all we need to do is make the adapter! Let's get to it.
Alright so, to make this we can actually reuse the circuit diagram from
our half scale Cybertruck in fact we only need this part right here.
Now remember I'm a mechanical engineer not electrical engineer so really I have no
business doing electronics like this let alone high voltage, but it is just two
resistors in a diode so I think I can handle it. Hopefully I don't have to call Bogdan.
Alright so the diode is a 1N-4003. The only issue is I have no idea
where we keep diodes up here.
Let's skip to the resistors cause I do know where those are. Right here.
Alright so we're looking for a 2.7 kilohm resistor,
and a 1.3 kiloohm resistor.
1.3 kiloohm! Perfect.
We also need a two point seven, two point two, three, three point three... we can do two one point three's...
and a 100?
I think that works?
TADAA! Alright let's test out my homemade resistor as long as my math is right and
it must've been because I'm a Hacksmith
we should get 2.7 kilohms right here.
1.5.
Alright let's try this again we want 2.7 so we take 1.3,
1 and then 1 plus 1.3 is 2.3 plus 400.
So we could do 2-200's.
There we go and it's a W this time!
Alright let's try that again, got my voltmeter. My multimeter sorry, and now we have
2.7 Kiloohms! Now we can use this resistor and the 1.3
resistor and we still need that diode...
and it turns out we have two
drawers down here called 4007 and they look like diodes to me. So the real
question is why do we have this many 4007 diodes and why did we use 4003?
Whats the difference... so the difference between these diodes is mainly the reverse
breakdown voltage in 4007 can withstand a higher reverse voltage
usually the higher voltage divergent series have a higher v forward lower
capacitance and longer TRR...
Okay so I understand some of these words but I have no idea.
I'm gonna call Bogdan.
Hello? Hey Bogdan! I can't find a 1N-4003 diode.
Can I just use a one and 4007 diode?
I'll check the ziplock, thank you!
I know I said I didn't want to call Bogdan, but in my defense how else would I
have known that there's actually 4003 diodes hanging out with
the 4007...
There's totally no 4003 diodes here.
Any ideas where that.. Digi-Key bag would be?
So far not look- O0h are these flash tubes?
No they're uhh read switches. Alright so you're telling me I can use 4007?
Thanks Bogdan! Alright so that was a whole bunch of
running around potentially nothing because apparently 4007
and 4003 are close enough 4007 is just more expensive and better.
We just have to solder these two guys together.
I attached that wire to the J1277 port and as soon as you short these two wires
together, which also connects back to earth, we should have power.
Alight so this is already taking way too long in the video so I've gone ahead and I've
made my little adapter basically we plugged this into ground and we plug
this into, this right here. We will get 240 volts out right here.
Which means we can power the Onewheel.
So let's box it up. I want the plug to come out one side
and I want an outlet on the other side so we can literally just plug in,
the Onewheel.
It's beautiful.
Basically you plug in your EV charge port here.
220 comes out here, but only if you press the on button.
Now in case you want to make one of these yourself. You can check out our full circuit diagram on Maker.io
sponsored by Digi-Key.
Before we go out and blow up a charge port.
We should double check to make sure the box works the way we.... it does.
And to do that we can use our Cybertruck charging port which just plugs into the
normal 220 volt outlet like so.
Now as long as this works and I didn't want wire
anything wrong I can go ahead and plug it in there and hypothetically I should
get 240 volts out of this side. Yes we have 240 volts.
Why does it sound like there's something melting?
Alright false alarm everything looks good I think it was
just the sound of the plastic rubbing on a steel table, which means I have no fear
of plugging in my Onewheel charger.
Plug her in. Boom it's charging.
Red light on there alright everything's good which means it's time to actually take this
and plug it in to a real EV charger and make sure it still works.
Ah.
I probably shouldn't go and try and test this at 1:00 a.m. because if there's any
security at any of the EV charge points they'll probably be like what the hell
are you doing with this box and stuff? So we'll have to do that tomorrow morning.
Alright now it's time to go test to see if I can charge my Onewheel off of an EV charge station.
Let's go
Is that a cat?
It's black cat!
Hello kitty, hi!
Hello!
You're so cute.
You're like a skinny version of my cat.
There we go.
Alright lets try this out.
Power button.
And look we have power! Need to plug this into here, light is green.
I think it's working!
Charging!
0.2 kilowatts!
Plugged in 29 minutes until full charge.
I guess we'll have to wait here a bit.
Now you might be wondering
wouldn't it be easier to just charge your Onewheel from a normal outlet?
Well you're probably right but I wanted to do this video to show you guys how you can
use a publicly available electrical standard to hack the system.
It's not really hacking the system because I have to pay for this using a charge point but,
it's kind of cool being able to use something designed to charge EV to
charge your Onewheel. Anyway thanks for watching and make sure you subscribe!