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Title: Whats on your Honey-Do list? Post by: Neonkiss on October 04, 2009, 08:45:17 PM I have been putting this one off for a while now.
However I got cornered after relaxing in the pool. My wife has the Revo Hair Styler brush that does not work. A very simple gadget the has a motor and a battery, where the brush end twirls on the electric motor. I just figured that the Nicad batteries were dead so I opened it up. Sure enough the batteries read 0.000 Nothing, nada.... This is where I'm confused, The power supply is original and it's listed at 3VAC 400 ma I checked it with my meter and sure enough it is 3 VAC Now how can this thing use A/C voltage and charge nicad batteries? The battery pack is so dead I cant tell where positive or negative would be, but the motor does run on D/C power. The circuit board is so simplistic I can't figure out how two diodes and one resister could possibly be used in a circuit with an A/C charges and rechargeable batteries. I would have thrown this in the trash by now, but I'm too curious as to what I'm missing in this circuit. :103- Title: Re: Whats on your Honey-Do list? Post by: brichter on October 04, 2009, 08:51:38 PM 2 diodes can make a half-wave DC rectifier...
Title: Re: Whats on your Honey-Do list? Post by: Neonkiss on October 04, 2009, 10:56:05 PM Thanks brichter,
I think that's it... :3- :3- I looked up a half-wave DC rectifier and I understand now how they use the diode to split the half of the wave. Not the most efficient, but I guess it works. Here is a great explanation of how it works. http://www.allaboutcircuits.com/vol_6/chpt_5/3.html (http://www.allaboutcircuits.com/vol_6/chpt_5/3.html) Title: Re: Whats on your Honey-Do list? Post by: stayouttadabunker on October 05, 2009, 01:19:02 AM It pretty much the same in my electric shaver...
the smallest board you've ever seen converts household current into a trickle charger for the nicads in the shaver...pretty amazing really. :89- I wouldn't say it's on my "honey-do" list though... :72- Title: Re: Whats on your Honey-Do list? Post by: brichter on October 05, 2009, 01:59:31 AM The only things that need to be done around here are the mechanical things I've had to put off due to my shoulder, and it's a list that keeps getting longer. :25- :37-
Title: Re: Whats on your Honey-Do list? Post by: mkd3b on June 01, 2010, 04:59:21 PM How come we cant ever get the Honey to be on Honey do me list?
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