Home-made transportation is a thriving area for makers to flex their skills. Looking to shorten their university commute, [doublecloverleaf] modded his penny board by adding a motor that can have him zipping along at 40 Km/h!
The electric motor is mounted to the rear truck and delivers power to the wheel gear using a HTD 5 m pulley belt. Finding the deck too flexible to mount the battery pack under, [doublecloverleaf] strengthened it with a pair of carbon-fiber tubes bracketed on the underside. A few custom PCB boards connect ten 5 Ah LiPo battery cells in series to create two, five-cell packs which are kept safe by a thick housing mounted between the board’s trucks. [doublecloverleaf] calculates that they could make up to a 15 km trip on a single charge.
Thinking ahead, [doublecloverleaf] opted to use a DB25 port for charging — 9 pins for voltage balancing between cells within each battery, and ten more (five positive, five negative, in parallel) for charging at 5 A. A USB port allows him to tweak the VESC motor controller — this adds, among other useful features, regenerative braking!
A slightly modified RC car remote controls the motor — simply pull on the trigger to accelerate, and push to reverse and engage the regenerative breaking. It’s currently set to 80% of the motor’s max RPM at 40 A to preserve both the board and the rider’s health. Any faster, and they’d have to think about challenging the land speed record for electric skateboards.
The monkey in the loop adds too much drag, wouldn’t making it autonomous be more efficient?
i don’t think drag is the primary benefit of removing said monkey, think of the motor battery/combo one could replace it with.
Why do I see this so often…it’s “braking!”
It’s braking if the energy is bled off in the form of friction. It’s regenerative if the energy is used to recharge the battery and thereby extending the range.
I believe, Paul is commenting on spelling in this case.
I checked that before I replied. When I checked it was correct. Only misspelling was in the comment. The power of the edit button?
See it in the second paragraph. Ok.
I read it to mean that the board can heal itself when broken.
He’s talking about the spelling, “breaking” vs. “braking”. The regenerative aspect has nothing to do with it.
Not the only thing cringe-worthy, “PCB boards”…
Someone’s belly is breaking somewhere about @RandyKC’s response to @Paul about braking…
I think he was commenting on the spelling of “breaking”/”braking”, not the “regenerative” part
Awe man, I saw the miss-communication an could half pre-vented dis cat-ass trophy!
Motor seems to be 2.7kW, from the imgur gallery : “Top speed is around 40 km/h and peak power output (limited by motor) is 2.7 kW.”
That remote… if you are black and use it the police will shoot you… Safe for white kids, though.
Is it really? He looks like someone speeding around with a gun out. White or black this guy would get shot if he were in the wrong place/time with this out.
Unfortunately that’s probably the best design for the remote. Perhaps painting it pink or some other non-threatening colour would help?
How about… https://en.wikipedia.org/wiki/Power_Glove
Also, real pink guns exist; it would appear that he stole it from some unfortunate lady. D:
Anyone with that in their hand, I would possibly call the cops on. It does look like a snubnose from a distance.
Except, he’s not American and doesn’t need to worry about holding something vaguely gun-shaped.
He is not from USA
But can it make the Kessel Run in less than 12 parsecs?
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