| ??? 12/03/07 04:32 Read: times |
#147758 - 50 percent duty cycle Responding to: ???'s previous message |
The problem with this 300 hZ solution is that when dividing by 5 the output waveform becomes easily a pulse instead of a 50% duty cycle square wave. That kind of signal is not easy to filter.
Dividing the frequency using harmonics would yield better result but the circuit would also become more complex. A microcontroller sensing the 50 hZ mains signal and producing a sine wave using PWM is very simple, requires very simple RC oscillator (no chrystal) and IMHO is more versatile plus the fact that the PWM signal does not require multi-pole filter to be conditioned properly. |
| Topic | Author | Date |
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| Go back to the USA... | 01/01/70 00:00 | |
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| 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 | |
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| That was so kind of you. | 01/01/70 00:00 | |
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| OK will post the photo of the innards... | 01/01/70 00:00 | |
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| Buy an Inverter | 01/01/70 00:00 | |
| Alternative | 01/01/70 00:00 | |
| Another alternative | 01/01/70 00:00 | |
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| 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 | |
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