SamSuka
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Weird mains and solar rechargeable fan/light.

This was a gift from Vince the crew chief.  He travels around the world with work and found this odd fan and work light in Singapore.

https://www.youtube.com/watch?v=4mvMScvexjc

It turns out to be pretty common on eBay if you search for rechargeable fan LED work light.

Weird mains and solar rechargeable fan/light.

Comments

Maybe some kind of breaking mechanism to stop it faster?

Indeed many thanks to Vince, as this device is spot on for the channel. He has a good eye and a good heart. Cool device, yes! Good old lead acid batteries. :D

Michael Thompson

Clive, unrelated question. When I switch off my wood turning lathe, the motor makes a sound for one or two seconds like air escaping! What is that?

mikenco

It's just using the transistor as an amplifier (C-E current proportional to a much lower B-E current). See the "active" section here: https://learn.sparkfun.com/tutorials/transistors/operation-modes

Thanks to Vince for his generosity

The fan speed controller is super interesting to me. What is that technique called? I think I need to do something like that on a project myself but I've never seen this before and would have no idea what values to pair with what transistor / mosfet. My issue is that I want variable intensity on a battery-powered lamp, but potentiometers capable of dissipating the current I'm expecting at maximum brightness are quite expensive.

George Dorn

Friday arvo, work's over, nice cuppa, BigClive video. Life is good!

Wim

you mispronounced "FULL BRIDGE RECTIFIER" as "full bridge rectifier"

Hmm since that is a 4v battery. I will bet you can put in a lithium pack with a charge / discharge protection pcb.

Charles Bruckner

Looks like an ideal addition to a solder station. Fan for fumes and lighting for seeing the board.

evilution


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