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0.1 To 90 second timer

2017-08-17 10:57  
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The timer interval starts when power is applied to circuit and terminates when voltage is applied to load. 2N2646 is used in oscillator which pulses base 2 of D5K
0.1 To 90 second timer

This reduces the effective L of D5K and allows a much larger timing resistor and smaller timing capacitor to be used than would otherwise be possible.

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