More about battery (491)

1-10-2005 | The TIRIS family of RFIDs from Texas Instruments can be found in many consumer applications ranging from vehicle security to logging maratho...

1-07-2005 | After buying a number of DECT telephones, we noticed that these became quite warm while charging. That surprised us, because the manufacture...

1-07-2005 | This circuit was designed to ‘baby-sit’ SLA (sealed lead-acid or ‘gel’) batteries using freely available solar power. SLA batteries suffer f...

1-07-2005 | This small but very effective circuit protects a lead-acid battery (12-V solar battery or car battery) against overcharging by a solar modul...

1-07-2005 | Professional (directional) microphones often require a phantom supply of 48 V. This is fed via the signal lines to the microphone and has to...

1-05-2005 | This circuit was originally designed to power a motorcycle intercom from the vehicle supply system.

1-04-2005 | Modern mobile electronic gadgets demand ever more portable and powerful energy storage devices. Research by battery manufacturers all over t...

1-02-2005 | Valve circuits and radios in particular are graced by vast crowds of enthusiasts. If you want to keep your prize vintage radio as authentic...

1-11-2004 | The use of batteries has never been greater. Batteries are becoming smaller and lighter even as they package more and more energy per unit v...

1-11-2004 | This design is a follow-up to the triumphant ‘Battery Revitaliser’ project published in the September 2001 issue of Elector Electronics. Fro...