Yet again i have a problem.
I need to trigger a pulse from a rising edge of a input signal. My input will go from 0 to about 2v. When the input changes from 0v to 2v i want to send a pulse of 1.3v or greater. The input will not go to 0 for longer then the impulse.
I've been playing around with 555 timer but with no luck. I built the attached circuit but no luck. Is there another way or is the attached circuit right ??
hi
no problem in ur circuit but there is some notice.
ur circuit work from 3v to 15v if u work under 4.5v u must use cmos type 555
like icm7555.
u must add rb resistore to base of transistor to limit ib.
and trigger signal must have fast rise edge to active trigger circuit at pin2
of 555
hi
no problem in ur circuit but there is some notice.
ur circuit work from 3v to 15v if u work under 4.5v u must use cmos type 555
like icm7555.
u must add rb resistore to base of transistor to limit ib.
and trigger signal must have fast rise edge to active trigger circuit at pin2
of 555
I'm using the LMC555CN timer and the 2n2222 and im still having some difficulty. I'm using the dual power supplies to test the circuit, so the rising edge is as fast as i can turn the voltage knob.
I looked at the picture you provided, in the output you send a pulse of 0v right?
I need to send a short pulse of about 1.5 or higher pulse.
I want to send a short pulse of about 1.5V or higher to an H-bridge to drive a solenoid. The pulse would be sent as a result of a rising edge of my signal.
wat the time for pulse width u need?
and abt to get 1.5v in the output u can ad pot to get value from zero
to vcc but value of pot depend of rin of next stage
Is there any reason why a simple C-R high pass network
would not do the job? Maybe with a low voltage Schmitt
inverter if you need to square it up. Or a
Depending on how well controlled the input and the
output, seems like it could be quite simple.
Is there any reason why a simple C-R high pass network
would not do the job? Maybe with a low voltage Schmitt
inverter if you need to square it up. Or a
Depending on how well controlled the input and the
output, seems like it could be quite simple.