| ??? 07/25/02 08:42 Read: times |
#26296 - RE: Zero crossing detection ckt. |
you have no pull down so the on chip pull up in the port / INT0 pin is holding the line high. I would use a comparator (LM311) with a reference at 2.5V, this can be VCC divided by 2 resistors, the output of this with a 4K7 pull up feeds iNT0 well |
| 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 |