| ??? 07/01/03 17:01 Read: times |
#49795 - RE: Simple Digital Clock ---89C2051 Responding to: ???'s previous message |
Hello Stanley,
How did you measure the pulse signal? A deviation of 1 second/hour means it has a frequency of 1.00027777Hz, so if the counter you are using has only four digits resolution, you won't see any difference. Are you using a crystal? What is the clock frequency? Which timer mode do you use? Also remember that a 'standard' crystal has a tolerance of +/- 100ppm, which equates to a possible deviation of 8.64 seconds/day for your clock. If you want better, you will have to have some way of calibrating the oscillator. Best regards, Rob. |
| Topic | Author | Date |
| Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| RE: Simple Digital Clock ---89C2051 | 01/01/70 00:00 | |
| Here comes the oscillator bible | 01/01/70 00:00 | |
| RE: Here comes the oscillator bible | 01/01/70 00:00 | |
| Thanks, Michael | 01/01/70 00:00 | |
| RE: Here comes the oscillator bible | 01/01/70 00:00 |