Simple Touch Switch One Shot by 4011

Thursday, April 17th, 2008

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Here is a simple touch control switch, I use IC 4011.
Logic HI at output is timer pulse delay control by C1
1S = C1 4.7uF(micro farad),
After touching the plate connected,so well pulse output.
Detail more, Please read in this image circuit.

One-Shot by IC 74LS02

Wednesday, August 15th, 2007

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This is circuit Digital One-Shot,
use IC TTL Digital 74LS02 : QUAD 2-INPUT NOR GATE .
Time Output = 0.8xRxC
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555 timer Mono stable (one shot) circuit

Thursday, April 19th, 2007

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The two circuits below illustrate using the 555 timer to close a relay for a predetermined amount of time by pressing a momentary N/O push button. The circuit on the left can be used for long time periods where the push button can be pressed and released before the end of the timing period. For [...]