| ??? 07/24/02 07:57 Read: times |
#26232 - Zero crossing detection ckt. |
Hi,
Can anyone suggest a ckt to detect zero crossing for this project. I have used two diodes in series with Vcc at cathode and gnd at anode. I am giving the AC neutral point through 620k resistor to the point between the two diodes and at this point I get square pulses of 0-5 volts. When I apply these pulses to INT0(P3.2 I have kept the interrupt as edge triggered) I get pulses varying from 4.5-5 volts and hence interrupt is not ackd. I have tried to make the pin low at startup through software but the pulses become zero at that point. I can send you my ckt through e-mail. Regards, Nitin. |
| Topic | Author | Date |
| PID control for series AC motor | 01/01/70 00:00 | |
| RE: PID control for series AC motor | 01/01/70 00:00 | |
| RE: PID control for series AC motor | 01/01/70 00:00 | |
| RE: PID control for series AC motor | 01/01/70 00:00 | |
| RE: PID control for series AC motor | 01/01/70 00:00 | |
| RE: PID control for series AC motor | 01/01/70 00:00 | |
| Zero crossing detection ckt. | 01/01/70 00:00 | |
| Zero cross | 01/01/70 00:00 | |
| RE: Zero crossing detection ckt. | 01/01/70 00:00 | |
| RE: PID control for series AC motor | 01/01/70 00:00 | |
RE: PID control for series AC motor | 01/01/70 00:00 |