| ??? 12/02/07 22:48 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#147749 - Phase lock loop Responding to: ???'s previous message |
In the 3 countries of the world that I have lived in, the mains frequency is specified to be extremely accurate over a long period- 24 or 48 hours. I am sure this is also true of the US as well.
This means that a clock can be out at any given moment, but overall it keeps time pretty well. If forced to create a 60Hz signal, I would rather create a 300Hz oscillator and phase lock it to the 50Hz. I would then divide it by 5 to give the 60Hz. My first choice would be to look at the 4046 PLL, rather than attempt to do this with a micro. |
| Topic | Author | Date |
| 120V ac 60Hz from 230V ac 50Hz | 01/01/70 00:00 | |
| Go back to the USA... | 01/01/70 00:00 | |
| For a clock? | 01/01/70 00:00 | |
| I know of quartz stabilized inverters | 01/01/70 00:00 | |
| Thanks for the ideas.. | 01/01/70 00:00 | |
| I confess, the idea with the camping inverter... | 01/01/70 00:00 | |
| Kai - I know what you meant | 01/01/70 00:00 | |
| Kai - I know what you meant | 01/01/70 00:00 | |
| Look at the chip inside | 01/01/70 00:00 | |
| done that many times | 01/01/70 00:00 | |
| That was so kind of you. | 01/01/70 00:00 | |
| Maybe you could take a photo of the innards... | 01/01/70 00:00 | |
| OK will post the photo of the innards... | 01/01/70 00:00 | |
| Are you allowed to open the clock? | 01/01/70 00:00 | |
| Buy an Inverter | 01/01/70 00:00 | |
| Alternative | 01/01/70 00:00 | |
| Another alternative | 01/01/70 00:00 | |
| Phase lock loop | 01/01/70 00:00 | |
| Brilliant! | 01/01/70 00:00 | |
| 50 percent duty cycle | 01/01/70 00:00 | |
| Horses for Courses | 01/01/70 00:00 | |
| ??? | 01/01/70 00:00 | |
Avoid butchering the clock | 01/01/70 00:00 |