| ??? 02/22/10 17:32 Read: times |
#173433 - What should I do ... Responding to: ???'s previous message |
Thank you all,
Thanks a lot for so many cross currents and hot dicussions! It may be a "bad idea (!)" to connect live 220V ditrectly to the micro. I think I can do the same thing to one of the input pin of an op-amp and use its output through an optocoupler to annunciate the ZERO-CROSSING of the ac line. I think this method will sense ZERO-CROSS quicker than other methods at the same time will be less hazardous and less dangerous. Please also visit: http://www.electro-tech-online.com/micro-controllers/90751-zero-crossing-detector-220v-50hz.html Sandip. |
| Topic | Author | Date |
| Zero crossing detector - technique adoption | 01/01/70 00:00 | |
| Sounds like a bad idea to me! | 01/01/70 00:00 | |
| relying on parasitic diodes | 01/01/70 00:00 | |
| Confusing | 01/01/70 00:00 | |
| I mean | 01/01/70 00:00 | |
| Designing to typical values | 01/01/70 00:00 | |
| what blather | 01/01/70 00:00 | |
| " IDEA ? " - RIDICULOUS | 01/01/70 00:00 | |
| at least for this one | 01/01/70 00:00 | |
| Oh dear: | 01/01/70 00:00 | |
| tough, but true | 01/01/70 00:00 | |
| just caught this one | 01/01/70 00:00 | |
| Idiom | 01/01/70 00:00 | |
| It really is a *very* bad idea! | 01/01/70 00:00 | |
| Don't blindly follow app note | 01/01/70 00:00 | |
| It's not so much the parasitic diodes... | 01/01/70 00:00 | |
| two reasons | 01/01/70 00:00 | |
| What should I do ... | 01/01/70 00:00 | |
| That won't help at all! | 01/01/70 00:00 | |
| two wrongs | 01/01/70 00:00 | |
| Most app-notes don't work ... because they're wrong! | 01/01/70 00:00 | |
| This is typical ... | 01/01/70 00:00 | |
| I hate to tell this,... | 01/01/70 00:00 | |
App engineers not always the sharpest tools in the shed | 01/01/70 00:00 | |
| Unbelievable!! | 01/01/70 00:00 |