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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