Weird mains and solar rechargeable fan/light.
Added 2019-08-09 03:39:27 +0000 UTCThis 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.
Comments
Maybe some kind of breaking mechanism to stop it faster?
2019-08-10 22:17:39 +0000 UTCIndeed 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
2019-08-10 10:00:34 +0000 UTCClive, 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
2019-08-09 23:29:07 +0000 UTCIt'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
2019-08-09 21:34:05 +0000 UTCThanks to Vince for his generosity
2019-08-09 19:43:37 +0000 UTCThe 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
2019-08-09 17:54:57 +0000 UTCFriday arvo, work's over, nice cuppa, BigClive video. Life is good!
Wim
2019-08-09 10:13:50 +0000 UTCyou mispronounced "FULL BRIDGE RECTIFIER" as "full bridge rectifier"
2019-08-09 06:56:39 +0000 UTCHmm since that is a 4v battery. I will bet you can put in a lithium pack with a charge / discharge protection pcb.
Charles Bruckner
2019-08-09 03:58:39 +0000 UTCLooks like an ideal addition to a solder station. Fan for fumes and lighting for seeing the board.
evilution
2019-08-09 03:44:38 +0000 UTC
