Vlad's Gadgets

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Microsoft Digital Media Keyboard 3000

The Microsoft Digital Media Keyboard 3000 is sturdy, feels pleasant to type on and has a spill resistant design. It has extra hot keys for document editing and controlling media…

Microsoft Digital Media Keyboard 3000
Gadget Diary – Digital TV for my Grandparents

I visit my grandparents regularly on Sundays. They are almost 90 years old and live in North Bondi.

A while ago, I bought them the Economy Digital Set Top box, which…

Brief Blogs for Week Ending 2012-08-09

Comprehensive article on Lifehacker has lots of advice on how to protect your gadgets from theft: http://t.co/HGJ6UeRI ->

Excellent tip: To find great deals on Gumtree/eBay/Craigslist, include the search keyword "moving"…

Logitech Z4 Stereo Speaker System

If you want good stereo speakers under $100, the Logitech Z4 is an excellent choice. It's a 2.1 stereo speaker system consisting of two satellite speakers and a subwoofer, providing…

Logitech Z4 Stereo Speaker System
Vlad’s alternative design for the new UTS Business School (Dr Chau Chak Wing Building)

The University of Technology, Sydney has officially unveiled the new design for the $150 million Doctor Chau Chak Wing Building, which will host the new Business School.

This building was designed…

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12 Channel Smart AA, AAA and 9V Battery Charger with Discharge Function

Written by Vlad on March 19, 2011 – 10:12 pm - 3,330 views

Smart battery charger with discharge function, loaded with 8 AA NiMH batteries

This is a microprocessor-controlled battery charger that can charge up to 10 x AA/AAA batteries and 2 x 9V batteries. It supports both NiCad (Nickel-Cadmium) and NiMH (Nickel-Metal Hydride) simultaneously. Each battery is independently monitored and charged, and a multi-colour LED above each battery indicates the charging status.

There is a discharge function that drains all the batteries completely before commencing a charging cycle, which is useful for rectifying “memory effects” and other common battery problems. It employs several mechanisms to ensure that batteries are completely charged, but not overcharged.

It comes with both a 12V DC power adapter that operates worldwide on mains voltages between 100-240V as well as a lead that plugs into a car cigarette lighter socket so you can charge batteries when you’re on the road.

I purchased this from Jaycar electronics, who call it 12VDC & 240VAC Smart Battery Charger Ni-Cd & Ni-MH. I have seen similar smart chargers on eBay, but most are 10-channel chargers with support for only AA and AAA batteries.

Why I bought the Smart AA & AAA battery charger

(more…)


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