How to Make an Emergency Phone Charger
In this video, you’ll learn how to “MacGyver” a 40 Watt Electrical Generator from a cordless drill and a few household items. Here’s how to charge your phone, illuminate small lights, and make electricity in a pinch.
Step 1 is to gather all the necessary parts..
This project is intended to be a “bare bones” approach to generating electricity in a tight situation. There are no voltage regulators, no diodes and no capacitors to smooth the current.
There may a risk in charging lithium-ion batteries without a proper battery charging circuit recommended by the manufacturer.
It worked fine for me, but if you try this on your phone, make sure you understand, and are comfortable, with the risks.
Back up your data in case your phone is adversely affected and your data or equipment is damaged as a result.
Project History & More Info:
When using a cordless drill, remove the battery pack so you’re not fighting the back EMF, and press the trigger button in to allow the electrical connection to be made. Now all you have to do is twist the rotating end of the drill, and you’ll be generating electricity at the contact points where the battery would normally connect. On my drill, a cranking speed of 100 RPM yielded about 5 volts DC.
A few household items will make it practical to use. For example, a crank handle (made from a mixing beater and a salad fork) will give better leverage for cranking. Some aluminum foil that’s been rolled up into a wire will help direct the electricity to the point of use.
The faster and harder you can crank the drill, the higher voltage, and more amperage you can extract.
Ideally, this could be hooked up to a bike, water power, or a windmill to generate effortless energy, and if done carefully, the energy could be stored in a battery for later use.