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DIY Candle-Powered Fan Keeps You Cool at Home Using Fire

Aug 1, 2014 06:56 PM
Two compact cooling fans on stands, showcasing their metal blades and heatsink designs.

Staying cool in the summer heat sometimes feels like it takes all the energy in the world. But what about a fan using no-cost electrical energy? If you're looking to keep cool during a power outage, or if you don't want to break the bank by running your DIY air conditioner all day long, you can use candlelight to power a fan!

Household Hacker outlines the whole DIY process below.

What You'll Need

A lot of these items can be found in an old desktop computer you might have lying around. If not, these items can be found for cheap on the internet.

How to Build It

Peltier coolers are used to generate electricity by using heat. This device will power the fan, but it can also work with a lightbulb, charge a cell phone, or do about anything that involves electricity.

  1. Use thermal paste to connect the Peltier cooler to one of the heat sinks. The heat sinks prevent damage to the Peltier cooler, and also acts as a stand.
Person using a device with a card on a copper surface.
  1. Put the four screws directly into the heat sink by each corner. This will give room to put the tea light underneath.
Electronic circuit assembly process with a hand adjusting components.
  1. Push the positive and negative wires of the hobby motor through the second heat sink and secure the motor.
Hand placing a finger on a metal heat sink with copper pipes.
  1. Attach the fan blade to the motor.
Metal cooling fan assembly on a workbench.
  1. Attach the heat sink with the hobby motor and fan to the Peltier cooler using thermal paste.
Model of a small turbine engine with exposed components.
  1. Hook the wires together.
A person working with wires and a heatsink.
  1. Place a tea light under the fan and watch it start on its own after it reaches 1 volt. If not, just give it a helping tap.
Cooling fan and heat sink assembly on a black base.

Ahhh, feel that breeze! You can also use this same fire-charging technique to power up your smartphone instead of power a fan, so check out Kipkay's video guide on that to see how it's done.

The next big software update for iPhone is coming sometime in April and will include a Food section in Apple News+, an easy-to-miss new Ambient Music app, Priority Notifications thanks to Apple Intelligence, and updates to apps like Mail, Photos, Podcasts, and Safari. See what else is coming to your iPhone with the iOS 18.4 update.

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