Vlad's Gadgets

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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
GLH Hair Thickening Spray (Hair in a Can)

We all saw those infomercials on TV in the 90's - people with bald patches had them instantly eliminated with an aerosol spray. It looked like they were spray painting…

GLH Hair Thickening Spray (Hair in a Can)
Welcome to Vlad’s Gadgets

Welcome to Vlad's Gadgets! This site is under construction. Soon, there will be all sorts of interesting stories about gadgets I have bought.

Gadget Diary – Converting Philips SHB7100 Bluetooth Earphones to Recharge from a USB Port

I own a pair of Philips SHB7100 Bluetooth earphones. They consist of a set of earphones connected to a pendant that hangs around your neck. The pendant contains the audio…

Gadget Diary – Converting Philips SHB7100 Bluetooth Earphones to Recharge from a USB Port
Silicone Rubber Tape Sticks To Itself Without Being Sticky

Silicone rubber tape differs from other tapes in that it fuses to itself without using glue or adhesive. This means that there is no sticky side that can leave a…

Silicone Rubber Tape Sticks To Itself Without Being Sticky
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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 - 3,773 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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