| ??? 04/11/04 16:03 Read: times |
#68307 - RE: AC proximity switch Responding to: ???'s previous message |
Prahlad:
I do not know much about your sensor. Can you provide a link to a data sheet for the device? I could comment however that I suspect that 1/4 Watt resistors will not cut it if you intend to bias an optocoupler off the power line. In a long ago project I used an opto coupler that was biased off the primary power line at 110 VAC to detect the 60 Hz power line frequency. Here is a similar circuit and note that a resistor of at least 2 Watts should be used. P = V2/R P = (110 - 4.7)2/11000 P = 1.2 watts 
Michael Karas |
| Topic | Author | Date |
| AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 | |
| do not buy a pig in a poke | 01/01/70 00:00 | |
| RE: do not buy a pig in a poke | 01/01/70 00:00 | |
| kiran | 01/01/70 00:00 | |
| RE: kiran | 01/01/70 00:00 | |
| RE: kiran | 01/01/70 00:00 | |
| RE: kiran | 01/01/70 00:00 | |
| RE: kiran | 01/01/70 00:00 | |
| RE: kiran | 01/01/70 00:00 | |
| RE: kiran | 01/01/70 00:00 | |
| one better (or is that worse) | 01/01/70 00:00 | |
| RE: kiran / Contact details | 01/01/70 00:00 | |
RE: kiran / Contact details | 01/01/70 00:00 | |
| RE: kiran | 01/01/70 00:00 | |
| RE: AC proximity switch | 01/01/70 00:00 |