| ??? 06/12/07 14:11 Read: times |
#140593 - carve this into stone Responding to: ???'s previous message |
Russell Bull said:
Just goes to show optos aren't quite the magic bullet you hope they are. No, they are not, for inductive kickbacks. Neither are they for isolating spikes from ESD. They have several pF of capacitive coupling between "primary" and "secondary", and the isolation voltage is not THAT high, either (plus the PCB sometimes leaks considerably when subjected to several kV, too). They are good to keep out mains voltage, still. These words should be carved into stone, Russell. Once again, the "real world" strikes back upon us, the stupid digital designer. JW |
| Topic | Author | Date |
| Under/Over Voltage Protection | 01/01/70 00:00 | |
| How Big a Motor | 01/01/70 00:00 | |
| Transients | 01/01/70 00:00 | |
| never thought of that, but worth emphasizing | 01/01/70 00:00 | |
| Crikey! | 01/01/70 00:00 | |
| carve this into stone | 01/01/70 00:00 | |
| Only, if you buy the cheapest ones... | 01/01/70 00:00 | |
| i've heard | 01/01/70 00:00 | |
| voltage dips | 01/01/70 00:00 | |
| I doubt it | 01/01/70 00:00 | |
| power dips and spikes | 01/01/70 00:00 | |
| Dippy | 01/01/70 00:00 | |
| How long lasts the mains dip? | 01/01/70 00:00 | |
| mains dip | 01/01/70 00:00 | |
Sprinkle as many caps as possible... | 01/01/70 00:00 |