Отправил alexfloka.Дата добавления 25.10.2011 (1995 прочтений)
GENERAL PURPOSE DUAL BIPOLAR TIMERS
. LOW TURN OFF TIME . MAXIMUM OPERATING FREQUENCY GREATER THAN 500kHz . TIMING FROM MICROSECONDS TO HOURS . OPERATES IN BOTH ASTABLE AND MONOSTABLE MODES . HIGH OUTPUT CURRENT CAN SOURCE OR SINK 200mA . ADJUSTABLE DUTY CYCLE . TTL COMPATIBLE . TEMPERATURE STABILITY OF 0.005% PER°C
DESCRIPTION The NE556 dual monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For a stable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200mA.
Ремонтируя импульсный блок питания (ИБП), отключите его от компьютера и нагрузите лампочкой 75 Вт на 220 В. Так Вы убережете контроллеры и платы компьютера от повреждения из-за возможных скачков напряжения, возникающих при ремонте ИБП