| ??? 08/01/05 04:13 Read: times |
#98535 - Using 51 as a Monoshot Responding to: ???'s previous message |
Hi,
you can connect the reiciver output to one !int input and program it for edge triggering. in ISR you set a Flag that a negative edge has been detected, on program you check for this flag say every 750 (with 50% error tol) micro secs. if flag is set there was a negative edge since last 750 us and that shows the presence of the signal .here you clear the flag again and check again. Abhishek |
| Topic | Author | Date |
| IR BURST (38kHz), Only for 100 mS ? | 01/01/70 00:00 | |
| Try a different receiver | 01/01/70 00:00 | |
| IS471 from Sharp. | 01/01/70 00:00 | |
| Diffrent Reciever, | 01/01/70 00:00 | |
| Stuff inside | 01/01/70 00:00 | |
| Why Dont You Modulate? | 01/01/70 00:00 | |
| Missing pulse detector. | 01/01/70 00:00 | |
| Various methods | 01/01/70 00:00 | |
| Using 51 as a Monoshot | 01/01/70 00:00 | |
| Alternatively.......... | 01/01/70 00:00 | |
| The module | 01/01/70 00:00 | |
| Modulate | 01/01/70 00:00 | |
| Modulate | 01/01/70 00:00 | |
But actually it DOES | 01/01/70 00:00 | |
| LM567, tone detector, Solve the problem. | 01/01/70 00:00 |