Chadèche : un chargeur-déchargeur (très) intelligent pour accus NiMh
![4131](https://cdn.xingosoftware.com/elektor/images/fetch/dpr_1,w_200/https%3A%2F%2Fwww.elektormagazine.com%2Fassets%2Fupload%2Fimg%2Fpublic%2Foriginal%2Ffig13-b.jpg)
It all started with a handful of 1.2-volt NiMh batteries (AA and AAA size) lying in the back of a drawer. I was using them for my aeronautical GPS and didn't know which ones to rely on: some held the charge for just a few hours, others provided more than 24 hours of good and loyal service. To get a clearer picture, I started building a constant current (100 mA) discharger on a simple Veroboard card. I didn't know then that I was putting my finger in a gear that would allow me to return to my original profes
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