| Notebook PCs are great but stray too far from a source of power and it’s not long before low-battery warnings start to appear. Mains adapter...
More about Battery (455)
| This circuit makes it possible to do something that was previously unthinkable: reversing the effects of sulphation in tired lead-acid batte...
| More and more electronic devices are portable and run off batteries. It is no surprise, then, that so many flat batteries find their way int...
| Electric torches, watches, pocket calculators, toys and personal stereos, they all need a particular type of battery to do their job. In som...
| The Over-the-Top type of operational amplifier is ideal for use as a current sense for battery charger applications. The design described he...
| 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...