[SOLVED] Help with pulsing signal

[dope40]

Hi , how can i turn pulsing 12 v signal into continuous 12v signal

 

[deepmak]

Hello dope,
if your pulse are positive only , you are describing a peak hold circuit but then what is the purpose of the circuit ?
Regards

 

[dope40]

Yes, my pulse are positive only . I am building antilag system for a car , and i need the circuit to monitor the state of the fuel injectors.

 

[deepmak]

i see , i suggest you do search for "Fuel injector " in the forum . i remember seeing some posts about them , this might help you , but as i know nothing about the signal of the injectors or how they are supposed to be , what you would monitor ? the absent of the pulse ? the width or what ? is it a PWM or just pulses ?

 

[dope40]

i would monitor the absent of the pulse to the injectors , thats why i want to make it in to one continuous signal

 

[deepmak]

i see . now how about a missing pulse detector circuit ? will such circuit helps ?
here check a link to such :
https://www.circuitstoday.com/missing-pulse-detector-circuit-using-ne555
hope this helps
Regards

 

[dope40]

Thanks , but i want to use continuous signal so i can triger optocoupler , thats why i will search for peak hold circuit .If you can send me one that will be great.

 

[deepmak]

ok , check this link . the fourth circuit is peak detector and hold
**broken link removed**
just out of curiosity , you want to trigger optocoupler while the pulses are ok or while when they are gone ?
i think the previous circuit can generate an inverted logic (as long as the pulses are ok , the output will be high , and will drop to zero in the event of missing pulse by replacing the PNP transistor with NPN one )
hope this helps
Regards

 

[dope40]

I will triger the optocoupler while the pulses are ok so i can disable the exhaust manifold purge system.Thanks for all the help.