Like this?I need a circuit that when senses a pulse of voltage from 1-5 v dc doesn't matter how much to give continuous output and when senses another pulse to turn off.
Is that possible to do with some simple circuit
Yes buti don't have 4013 can i use 4747Like this?
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Can you sent a circuitYES, definitely possible. In fact, that function is part of a product that I designed several years ago. Easy to build, does not need calibration , and it does not draw much power. Also, not expensive to build.
It will switch on with the first pulse, off with the second pulse, on with the third, and alternating as long as the pulses keep arriving. If you want any other action it gets more complicated.
Do you mean a 7474?Yes buti don't have 4013 can i use 4747
Yes i forget how it wasDo you mean a 7474?
You can't let the Preset(Set) and Clear(Reset) Pins as floating status, they should be connected to Ground, otherwise they will catch the noise as pulse input, and they may fighting.Like this?
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Thanks, Les! The futurelec page wasn’t clear to me on that point. I checked another datasheet.Hi djsfantasi,
Preset and clear should be tied high as they are active low signals on a 7474 (On a 4013 they are active high.)
Les.
ThanksQ1 collector connects to the clock input of the 4013.
Les.
The TS has already stated that he cannot use a 4013, as he doesn’t have access to one. He did have a 7474. Danko provided a circuit that used a 4013 as a T flip flop. It could be implemented with the 7474 which he had.For power on reset with a CD4013 dual FF, use a 10K ohm resistor to negative supply, from the reset pin, and a 0.01mFd capacitor from the supply positive to that reset pin. You might need to experiment with values, it depends on supply voltage rise time at turn on.
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