Showing posts with label UJT. Show all posts
Showing posts with label UJT. Show all posts
Thursday, September 25, 2014
Simple UJT Timer Circuit
ln operation, the peak point requirement of UJT O1 is reduced to about } 1/1000 · of its normal requirement by pulsing its upper base with a volt negative pulse derived from the free running oscillator UJT I O2
This regular pulse momentarily reduces the peak point voltage of O1 1 and thus allows the peak point current to be supplied from C1 rather than F1‘1,` as it would be with the more conventional circuits of this type. The pulse rate of oscillator O2 is not very critical but it should have a period that is less than one fiftieth of the overall time delay.
Simple UJT Timer Circuit
This regular pulse momentarily reduces the peak point voltage of O1 1 and thus allows the peak point current to be supplied from C1 rather than F1‘1,` as it would be with the more conventional circuits of this type. The pulse rate of oscillator O2 is not very critical but it should have a period that is less than one fiftieth of the overall time delay.
Simple UJT Timer Circuit
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