All items tagged with Power and Switch (65)

1-07-1998 | National Semiconductor has been producing and designing ICs for use in switch-mode power supplies for many years. The application of the...

1-07-1998 | A National Semiconductor Application switching power supply whose output voltage is appreciably lower than its input voltage has an int...

1-12-1997 | In the testing of circuits, there is sometimes a need for the supply voltage to be switched on at a gjven time or in steps.

1-07-1997 | If you are after a small, reliable and inexpensive switch-mode power supply, National Semiconductor's LM257x series of switch-mode power...

1-07-1996 | The rapid charger published earlier this year was hased on the ubiquitous TV U2402B IC. The charger was ahle to fully charge four AA bat...

1-12-1994 | The 'Medium power a. f. amplifier uses a relay for the switch-on delay to suppress annoying switching plops. When the amplifier ts switc...

1-09-1994 | SWITCHABLE A.C. SUPPLY Many experiments in the electronics workshop require a.c. voltages simply by setting the alternating supply voltages...

1-12-1993 | A module is described that enables a mains powered device of up to 275 VA to be controlled bya PC via the I²C bus. Since a direct connecti...

1-12-1993 | Because of their inertia, power consumption, contact wear, and often size, relays are not really suitable for switching alternating volta...

1-07-1993 | The power off circuit ensures that the load is automatically removed from a battery. Itis particularly useful in cars, so that if the dri...