Make your own hand-cranked Emergency Powerbank 

FYI, you could avoid the problem of overcharging by feeding the input to the DW01 protection chip instead of directly to the battery, since that's what it's designed for. (Saw this power bank has the classic DW01 with dual mosfet package arrangement for battery protection.)

Reminded me of Electroboom's handcranked charger

You..you have an assistant?

Me: My wife helped me print 3D parts Man: Your wife is a engineer? Me: Nah... The 3D printer is my wife

Great Scott: stay creative. EU: we don't do that here.

it's cool to know that nearly everybody here is a GreatScott and ElectroBoom fan at the same time :D I am sure they will make a video together.

Love the ingenuity! I've been storing all electronics parts over the past decade(3 laptops, numerous phones, digital cameras, and so on) looking for a worthy project, now I believe I've found one!

Haven't watched your videos for a few months and the first thing I noticed is that your accent got signifficantly better!

Yeah, jlcpcb offers cheap pcb, but delivery costs are huge. For example: shipping to Poland costs $24.

Nice project ^^ But one thing: You could build in a bridge-rectifier direktly after the Motor/Generator, so its not important in witch direction you crank. Also, the Outputvoltage is lover, but the current is uneffected, so lower risk of overcharge the Battery :)

I love hearing him say "Gerber" it's like the modern equivalent of how the word "squirrel" was used to detect german spies.

Your videos are just the best

Those are the nicest 3d printed designs I've seen on here before. The "assistant" shows here. It was obvious you got more done in a week/single upload than is typical for this channel's regular upload schedule. I have a suggestion for another 3d printed project like this. Do a resistor box. You could do the typical decade resistor box like every hobbyist should have, but I think there is a better first design that often gets overlooked. The first resistor box everyone should build is one that has each resistor value that they keep in stock. This device will save countless resistors from being lost or discarded while doing breadboard experiments. Decade resistors are great when a precision value is needed, but it isn't very useful if a person figures out they need a 5k9 resistor when all they have are 5k6 and 6k8 5% resistors. Sure they can parallel and serial several values to achieve their goals, but this is something for more intermediate level hobbyists. The first thing we should all build are resistor boxes with one of each value we keep in our personal stocks. IMO the best way to build that is to place them all on a custom circular PCB or 3d printed design and come up with a rotating switch solution like the dial of a multimeter with one position for each resistor. Personally I recommend getting a pack of 50 values of 5% resistors with 2500 resistors total from somewhere like AliExpress for around $12 shipped. This isn't a complete set of all 5% values but it is generally the best dollar value for a wide range of values and a great starting point. For a really good starting point, order the 50 values set, and 100 more pieces of 220R, 330R, and 470R to work as current limiting resistors around 5v and under with LEDs and such. Then order 100 more 100R, 1k, 10k, and 100k for a good starting collection. If you can spend a bit more, the halfway point between the 10's within the logarithmic scale 5% resistor values is "47" so order 100 more 470R, 4k7, 47k, 470k and you'll be setup really well. Also note, the 4 value bands of 5% resistors are much easier to learn to identify visually. You'll have all of the color bands memorized very quickly if you get these instead of the 5 color band 1% resistors. ...anyways.. I've been thinking about how I can etch my own little resistor boxes like this for my personal parts stock of resistors and capacitors. If I had a 3d printer I would probably create something that uses wire wrapping resistors for even more versatility. This is just one of those key tools to have a few of on the bench. The commercial products available are either a pain to use, are way over priced and/or have irrelevant values that don't match our stock on hand. It's a great project to build that often gets overlooked. -Jake

May be a good idea to put a mechanism to maintain a constant angular speed in the generator in between every crank push (like a simple heavy flywheel )

Super cool build man this guy deserves his own product line looks high quality

You are back,yay!

If I've to Keep my Power bank charged I can simply keep my phone charged -Electroboom

(Phones battery is dangerous low) Me: Starts building a crankshaft generator with the help of 3D printer, Oscilloscope, etc........

Great Scott! Your handwriting is magnificent!

Even though I'm software engineer, I love your videos. Someday I'll build something with the knowledge i gained watching all your videos. 🙂

Thank you Scott, very cool.

2:15 Those are some really *T. H. I. C. C.* diodes!

Concise explanations like at 6:50 are extremely helpful. Keep it coming!

I absolutely love your videos. I wish I had even half of your electrical knowledge.

A DC-Load Project would be very nice to see ... (since those loads are rather expensive)

hey greatscott, can you make a video about breaking bad's galvanic cell battery that walter and jesse made when they killed the battery in the middle of the desert?

This is what I was looking for so many days!!!

Nice video as allways. Good work.

Could you make a water turbine out of an old washing machine?

9:11 *We* created… Sounds like GreatScott has been playing around with symbiotes ;)

Nice experiment

Nice project.

"There is a burglar in my house, my phone is dead and my power bank is empty, quick, let me just shortly crank my generator for a few minutes!"

you can use a gearbox for the BLDC motor 👍

Nice description you are really a great scott I can clearly understand your problem and your solution

I’ve been actually wanting to make one for a while, thanks seriously

It is not fair to compare an ungeared BLDC motor with a geared DC motor. Also, what about using a stepper motor ? If you put the wires of common stepper motors in your mouth and spin them manually, it is obvious from the sensation that they generate quite a high voltage. Also, shorting the wires creates considerable resistance to motion - suggesting a low internal resistance. Of course a DC motor is the most obvious and simple solution, but it is not the most interesting in my opinion.

If I make one of these and a Stirling engine would I not have to crank it

Great job

Congratulations, you will be 1M in a month!

I made a similar device using 2 x 700farad 2.5v super capacitors in series to make 5v, and used a stepper motor as the generator. It was a 4 wire motor, I used two bridge rectifiers, one on each coil to change from AC to DC, connected in series to charge the super caps. I have since found stepper motors with planetary gearboxes already attached, which will make much better hand crank generators. You can use a little voltage boost circuit to keep a constant output voltage and get as much as possible out of the capacitors.👍

7:32 *Laughs in German*

Good job brother

Great video from the greatest

7:32 This is not an actual problem at all, but you may want to avoid that specific phrasing, as the main time you'd hear it is as the standard English translation of 'Endlösung'. Something like 'final design' works better here.

Damn 7 hour thats too much. We have to find a efficient and fast design. Because this is very good project.

Your assistant?! This is the first time I hear about your assistant!

Nice video sir

Can You Explain How A UPS Works and Maybe Build One?

0:39 you could get a powerbank with better capacity so it could charge more things?

scott...U NEVER FAIL TO IMPRESS US 😉😎👏 u're amazin' 🙌

big hug from Spain, from infomario reus team :D. Nice work

BLDC would work far more effectively with a gearbox than the geared brushed system you used.

i just made myself a joule theif

Good job I really like your projects continue 👏👏

The try and error are great, it shows how hard will be a project

Why not charge a Super Capacitor and then boost its' voltage to 5v?

nice

great scott!

Great very useful for people living off the grid.

*emergency coal*

Sir can you please make a video on UT6264 ram chip I love your channel

The handcrank powerbank. That is the best name, no other.

This kind of thing would be quite good to keep in a bag as a backup emergency power source Think I might make my own version

Like I mentioned in a previus video. The best generator IMO is a microwave oven motor with a bridge rectifier and a regulator to make 5V of the incredibly crazy high 100-800V the motor can generate. Its a 4RPM notor.

8:39 you have an assistant? Are you hiring?

A good source of motors for this seems to be windscreen wiper motors. There are two kinds, you need the continuous spinning ones (some go one way a bit then reverse). They are low rpm geared 12v,perfect for this.

Useful video 👍 Excellent 👍

Why did you not use a FULL BRIDGE RECTIFIER? Is there any reason for the one diode?

Why not just add one of those small battery protections circuits in between? To take care of the overcharging problem?

1M soon 🙏🙏

Awesome 👍

Please make a wireless charger for phones

Explain how a li-ion battery charge in fast charge (Qualcomm quick charge) ... Now a days latest mobile phones are charging in 20-30 minutes.... How does it work...?

The true free energy 😄

I can't be the only one who loves this guy's accent.

I have an idea for the next project! I wanna tutorial for 3d printed vacuum cleaner that will be powerful with brushless motor. And with speed regulator. And INSANE TESTs what can suck and what can't suck.

You should start using fusion 360 its free and is much better that 123d design

Incredible

Nice, thanks for sharing 😀👍 Practis is the learning tool 👍

Your phone need to smoke first

I would have thought a gear box would have been the first thing you would do with the brushless motor before rewinding

You are verry genius

Very cool

Guess what im going to say.... hmmmm OUR GERMAN ENGINEER IS BACK WITH ANOTHER AWSEOME VIDEO!

If there’s is japan,my answer is ac plug in train

Awesome!

Super Bro

*What if you use a Super-Capacitor in place of the Lithium battery*

Your English is becoming better! 😊

Good video

Very intresting

1M soon

Awsome survival electronic`s :D

He wrote 6.6̅, including the overline meaning recursion. I'm proud of him!

great assistant! he/she has the skill of 3d design

for everyone playing at home, Use a stepper motor. find the winding pairs put a bridge rectifier on each set and you get some seriously good power. I've found it best to charge up a super cap bank then take from that via a buck converter. Good for wind, hydro, pedal or hand crank.

thank you!! SIP is saved!💜💜

Those old dynamos we used to have on our bicycles to power the lights, would be great to charge a phone while out riding.

Ok this is epic