| The Over-the-Top type of operational amplifier is ideal for use as a current sense for battery charger applications. The design described he...
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| With just a low cost DC adapter and the circuit described here it is possible to build a low cost stabilised, uninterruptible 9 V supply. On...
| The LM4050 from National Semiconductor is a high precision micropower shunt voltage reference in a sub-miniature, surface-mount, three pin,...
| The battery discharger published in the June 1998 issue of this magazine may be improved by adding a Schottky diode (D3). This ensures that...
| This time, Velleman have sent us a car burglar alarm construction kit for evaluation. This is a fairly simple but highly functional circuit,...
| Some workbenches can’t help ending up looking like a rats nest of cables and equipment, so its always an advantage if a piece of mains equip...
| Since the introduction onto the world markets of the Li-ion battery in the early/mid 1990s, there have been no dramatic developments in batt...
| It’s often the small, everyday things that turn out to have interesting features when you examine them more closely. In any case, here you c...
| The integrated output amplifier described in this article consists of little more than one integrated circuit. It is intended especially for...
| There is a wide variety of NiCd (nickel-cadmium) battery chargers on the market, but there are not many that can work from an incar 12 V c...