Building a handcrank generator to power an iPhone

Here are some experiments I did on turning small DC gear-head motors into small generator sets to power cell phones and other small electronic devices.You can usually pick up small gear-head DC motors for a couple of dollars from junk dealers, or you could possible salvage one out of a small cordless screw driver. The biggest tasks are usually finding a way to attach an ergonomic crank handle and finding a gear-head motor that is geared properly, not too low and not too high. For auxiliary battery power, the better idea is going to be to bring extra, charged batteries, but if you are a long ways from the power grid with no chance to plug in a battery charger, there is no need to have solar cells, or a small wind turbine, good old elbow grease will put a charge to your cell phone, camera batteries, or computer tablet and other electronic devices that draw small amounts of electrical current. Unlike batteries, these generators should store well for many many decades without any loss of functionality. One additional thought, if your battery is nearly fully charged, you will likely have trouble turning the crank handle for any duration at a constant rpm, so use this video as a beginning guide to your own experimentation on what might be feasible. Also, if it is practical, I'd always recommend taking your battery out of your electronics before charging them with generator sets like these, that way you only potentially damage the battery and not some expensive electronics. I'd also recommend experimenting on some cheap electronics first and not your iPhone. Most modern handheld electronics like iPhones and Computer tables have mini-USB plugins, so if you salvaged a USB port from an old computer and did the proper wiring and did a bit of soldering, you could directly couple your cell phone to the generator with out the use of unwieldy alligator clips and the like, with just a mini USB interface cable. The battery inside your electronics will act as somewhat of a buffer for when you over-crank and put too much voltage in, but the better idea is to take the battery out of your electronic devices when practical. Since the amount of current you generator will be low, you will likely have to crank for several minutes for each minute of your phone is on in the receive mode. When you answer a call and start talking, the transmitter in the phone will then be the single biggest battery power draw, so keep your conversation short if you are using this as an emergency phone charger. I am sure that using devices like these on any of your electronics will void any warranty, so be forewarned!

Видео Building a handcrank generator to power an iPhone канала Gregory Logajan