Q:In the C disk WINDOWS which file is recorded switch machine time

In Windows XP, we can through the "event viewer" event log service to see the computer on and off time. Because the event log service starts and shuts down with the computer and leaves a record in the event log. Entry Mode: Start - Settings - Control Panel - Administrative Tools - Event Viewer - System

Q:Want to use a proximity switch, a time relay, a solenoid valve to control the automatic reciprocating motion of the cylinder.

The solenoid valve controls the reciprocating motion of the cylinder and sends a signal to the solenoid valve through the proximity switch, with the time relay being used.

Q:Samsung mobile phone automatic switch machine set time where?

Slide the screen up and select [About phone]. Select [Auto Power On / Off].

Q:Two contactors, two trip switches, two time relays, to design a circuit to control the motor's positive and negative

With two trip switches, two time relays, two contactors for normally closed control motor reversing

Q:W7 how to check the computer's history switch machine time

The system itself can not be time, you can try with 360

Q:The relay is operated until the set time is reached and the timer is restarted when the trigger switch is restarted. What type of time relay to use? If you can provide a better wiring diagram. (I said the trigger switch is pressed to turn on, release the hand automatically rebound off the kind of button switch)

According to my understanding, is not click on the switch, the device runs automatically after the set time? Or that is not the same as some of the corridor touch switch, click, light, delay a certain time, automatically extinguished?

Q:Switching power supply positive circuit, please help explain, the core of the reset circuit is how to work, has not been confused

Very simple reason ah, switch tube conduction time, NP winding voltage, current is on the positive negative, while the secondary NS voltage is also under the negative, to the load power supply, and NR winding voltage is negative, due to Diode DR one-way conductivity, NR winding no current. This stage of the NP winding magnetizes the core. When the switch off, the winding voltage polarity are reversed, NP, NS winding no current, and NR winding (voltage is negative) through the power and DR to form a loop, the winding current is negative, to the Core demagnetization, while the energy back to the power supply (to the power supply filter capacitor charge), but also to prevent the NP winding to produce too high anti-peak voltage breakdown of the switch tube, serve three purposes.

Q:For example, a week, I play every day, every day switch machine? Can you sleep all the time? If you can sleep, how long is the best sleep?

No relationship, when not on the shutdown, so as to extend the life of the hardware. Long boot is not good! Sleep is in the system before the shutdown, the memory of the file backup to the hard disk, and then you boot the next time, you can directly read the last backup in the hard disk image file to memory, so as to achieve rapid response. But the disadvantage is that sleep is sometimes difficult to recover!

Q:Zhengtai KG316T when the control switch locked, how to unlock the reset time

Time set from 1 second to 168 hours, can be set daily 1-4 group, and multi-channel control function. One setting is valid for a long time. Applicable to all kinds of industrial electrical appliances, household appliances, automatic control, both safe and convenient and save money. The output current can be 10-25A, both normal control 2200W to more power of electrical work. But also with the relay, contactor, and other control of a variety of other high-power power equipment.

Q:Time control switch to the specified time did not let the lights lit up

Time control switch to the specified time did not let the lights lit up mainly for the following reasons: 1, when the control switch is set, did not hit the automatic working state. 2, time control switch time is set incorrectly.