| ??? 04/11/05 06:21 Read: times |
#91358 - Elegant? Responding to: ???'s previous message |
Mike Hymel said:
As you can see, you have roughly 3 ms ... Hmm... I think Michael's approach, where the relay does nothing until you specifically tell it to, sounds more elegant that just hoping that "roughly" 3ms will be about right? This circuit will add delay to all relay operations - not just power-up You may still want to add a buffer between the 8051 port pin and the rest of the circuit ... if you don't mind using two port pins But if you add a "buffer," you have Michael's original circuit anyway - no need for extra delays! ... if you don't mind using two port pins ... Now that's just getting unnecessarily complicated! |
| Topic | Author | Date |
| Driving 12V Relay W/ 8051 | 01/01/70 00:00 | |
| Ammended Image Post | 01/01/70 00:00 | |
| that get you nowhere. | 01/01/70 00:00 | |
| A few things | 01/01/70 00:00 | |
| No, that is not so. | 01/01/70 00:00 | |
| an 8751, perhaps | 01/01/70 00:00 | |
| Pull Ups and Base Current | 01/01/70 00:00 | |
| ULN2003 | 01/01/70 00:00 | |
| door lock diagram | 01/01/70 00:00 | |
| One more method... | 01/01/70 00:00 | |
| Why not use 2N7000 | 01/01/70 00:00 | |
| 2N7000 Not Good By Itself | 01/01/70 00:00 | |
| You have a point | 01/01/70 00:00 | |
| FET solution | 01/01/70 00:00 | |
| Elegant? | 01/01/70 00:00 | |
| True.. | 01/01/70 00:00 | |
| It Can Be Small | 01/01/70 00:00 | |
| Zetex | 01/01/70 00:00 | |
| Could it be smaller? | 01/01/70 00:00 | |
| Think so. | 01/01/70 00:00 | |
| Onboard Resistors | 01/01/70 00:00 | |
| Digital transistors | 01/01/70 00:00 | |
Missed | 01/01/70 00:00 | |
| an added note | 01/01/70 00:00 | |
| solved by Allegro | 01/01/70 00:00 | |
| part number for Allegro chip? | 01/01/70 00:00 | |
| take your pick | 01/01/70 00:00 | |
| I missed a few | 01/01/70 00:00 | |
| It was a note :) | 01/01/70 00:00 |