All items tagged with technology and Battery (21)

1-07-1995 | The charger is designed to charge NiCd batteries with capacities of 150-4000 mAh. A potential 5 V higher than the nominal voltage of the...

1-07-1995 | A small quartz clock that is powered by a 1.5 V battery provides a simple means of determining the capacity of a NiCd battery. The circui...

1-07-1994 | This unit is intended as an add-on for the many lead acid battery chargers that have no charge indicator. A green LED shows that the bat...

1-07-1994 | A part from use as a standard charger, the present unit may also be used for continuous trickle charging to keep a 12 V lead-acid battery...

1-12-1993 | Nickel-metal-hybride (NiMH) batteries have now become widely available. A typical one is the 120AAH, which has a capacity of 1.2 Ah in si...

1-07-1993 | Many battery-operated appliances have an LED indicator that shows the state of the battery. If the battery is almost flat, the LED flickers....

1-12-1992 | The charger makes cunning use of the properties of a Type 555 timer. The tnternal window comparator of the lC is set to 4.7 V by zener dio...

1-07-1991 | A frequent annoyance with battery-operated equipment is that just after you switch it on you notice that the battery is fIat. Quite proba...

1-07-1991 | The charger deseribed switches off the charging voltage when the battery reaches its full nominal voltage and switches it on again when...

1-07-1991 | Keeping your car battery constantly charged when the car is not in use appreciably increases the life of the battery. Charging is, of co...