Fan

HOW TO ASSEMBLE

Also called coolers, the most easily found in scrap fans are the ones used in computers, but most of them are 12V. When plugged on the kit (that works on 5V supply), it will work really slowly, not strong enough to generate the desirable wind. Buying a 5V fan can be very expensive, for that, a cheaper alternative might be use a 5V DC motor and a propeller at the edge of it. You can build your own propeller or reuse one from a toy or a portable fan. Even if you decide to buy new motor and propeller, it will cost less than a 5V fan.

Lots of the toy’s motors have a pattern width that fits perfectly at the plastic ink chamber of ballpoint pens. You can also use a hard plastic, such as a soda cap.

Another hint, the DC motor doesn’t have a polarity, that is, it doesn’t have a positive or a negative pole. Inverting the cables will only make it spins on the opposite direction. So, if your fan is pulling air instead of pushing it, just exchange the positive cable by the negative. Fans standard are usually clockwise spin for ventilator and anticlockwise for exhauster.

Just as we did with the other modules, we recommend using hot glue on top of the solder to make it more resistant against cable drawn. Do it on both sides, motor and connector.

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HOW TO TEST