| ??? 05/29/05 07:46 Read: times |
#94083 - Correct? Responding to: ???'s previous message |
Erik Malund said:
what you show will work and there is absolutely nothing wrong with it save that you consume 5mA both in on and off state. Erik, Allow me to come back on the issue. You stated that I (well, not me, but the circuit...) will consume always 5mA (in the example given), whether the TOR is closed or not. However, unless I'm wrong, but when the TOR is open, then both sides of the resistor will be connected to +5V, since the IO pin of the PCF8574 is set as input, thus logically high. So, can I state that there will not flow 5mA, when the TOR is open? Best rgds, --Geert |
| Topic | Author | Date |
| CNX83: application examples? | 01/01/70 00:00 | |
| HOW | 01/01/70 00:00 | |
| did you find some in a drawer | 01/01/70 00:00 | |
| I know they're quite old... | 01/01/70 00:00 | |
| Better | 01/01/70 00:00 | |
| Schmitt Trigger | 01/01/70 00:00 | |
| nothing wrong - but | 01/01/70 00:00 | |
| Not working, Erik | 01/01/70 00:00 | |
| Pullup Or Not | 01/01/70 00:00 | |
| Additional Comment on Rise Time | 01/01/70 00:00 | |
| Confustion maybe? | 01/01/70 00:00 | |
| Yes, you need on PCF8574 | 01/01/70 00:00 | |
| No hijacking at all!!! ;-) | 01/01/70 00:00 | |
| Walks like a duck? Quacks like a duck? | 01/01/70 00:00 | |
| Yes, I do have quite a few ducks... | 01/01/70 00:00 | |
| Correct? | 01/01/70 00:00 | |
| Correct !! | 01/01/70 00:00 | |
| you must have edited | 01/01/70 00:00 | |
| I didn't do anything... | 01/01/70 00:00 | |
I do not know | 01/01/70 00:00 |