Computer AC power source monitoring circuit


Posted on Mar 28, 2007

Circuit principle: computers AC power load is large, the use of the current transformer current sensing. It can be used to detect whether a current power line, determine its st


Computer AC power source monitoring circuit
Click here to download the full size of the above Circuit.

atus. Schmitt is LM393 comparator circuit (A), after the power is turned on, set the alarm time interval by IC1 completed. When the input time (A, B, C, D) ended input binary code, 1C1 time interval can be set. B, D is set to the high level, A, and C is set to a low level. 1C1 input power frequency 1/2 division. If the power frequency is 50Hz, after about 87min, when power frequency is 60H, after about 73min, the output of the decoder (DECODE () UT) output high, VT1 conduction, HA buzzer sound, the sound of time from RI-I, CH decision.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Stereo balance meter
Voltmeter + Ammeter LCD panel
XC6121 Voltage Detector With Watchdog Function And ON/OFF Control
170W Class D Amplifier schematic diagram
FM Crystal Controlled Transmitter DPT
Treasury temperature measurement alarm circuit diagram F007 5G1555 F033



Top