Hello guys,

need help

kindly reffer attached image.... I have no idea HOW im going to make a delay with this... the 1 shot monostable, I could do... but the delay, clueless


-Ralph

 

Easily you can use a 555 push-pull circuit that will produce push-pull pulses but they are not good square-waves and they are not a modified sine-wave. You could delay the startup of the oscillator.
You can build a circuit with "presettable mark/space ratio" the mark and space are the high low ratios of the waveform.
More info here:
http://www.talkingelectronics.com/FreeProjects/555/555-P2.html

 

Easily you can use a 555 push-pull circuit that will produce push-pull pulses but they are not good square-waves and they are not a modified sine-wave. You could delay the startup of the oscillator.
You can build a circuit with "presettable mark/space ratio" the mark and space are the high low ratios of the waveform.
More info here:
http://www.talkingelectronics.com/FreeProjects/555/555-P2.html

its NOT an oscillator...the input is manually triggered..like I said before, its a 1 shot monostable, BUT with a -delayed- output...

 

visit http://www.doctronics.co.uk/555.htm and see if that gives you an idea or two.

if that doesn't work for you visit http://www.google.com/search?hl=en&q=%2B%22555%22+%2B%22monostable%22 and look at any of the 67,000 other pages that associate the 555 as a monostable.

 

Use two monostables, one for the delay and the other for your pulse.

 

Use two monostables, one for the delay and the other for your pulse.

ok.. BUT how do I wire this thing up? the 1 second delay..

 

ok.. BUT how do I wire this thing up? the 1 second delay..

GOT IT

a long "delay" monostable + inverter + short "delay" monostable...

BUT!!

I still have minor problem, even with a 500mS logic "1" trigger only, IT STILL TRIGGERS... finding a way HOW to NOT accept trigger pulses below 1sec "1" input...