please help me troubleshooting my project

[Audioguru]

Originally Posted by nasz

for PPM and PWM output, they are varied on the position and width of pulse but not the amplitude.

Correct.

from the simulation software, development hardware part and refer to LM555 data sheet, the amplitude of pulse are increase...how this can happen?

The amplitude of the pulses does not change.

how can be the output of PPM and PWM amplified?

The voltage amplitude of the pulses can be increased with an amplifier or with a digital level-change converter circuit.

[nasz]

im using LM555 for this both circuit, PPM and PWM... is it LM555 will amplify the their output?..

just for my confirmation, when the value of potentiometer increase the width of pulse will also increase...is it right?..

thank you...

[Audioguru]

Originally Posted by nasz

im using LM555 for this both circuit, PPM and PWM... is it LM555 will amplify the their output?

The output voltage is shown on the datasheet of an LM555. It is about 13.5V p-p when its supply is 15V and the load current is zero. It drops when loaded.

just for my confirmation, when the value of potentiometer increase the width of pulse will also increase...is it right

Correct.
The datasheet of an LM555 clearly shows the width of the pulses changing when the voltage at pin 5 is changed.

[nasz]

thanks a lot for your explanation...its really help me..

today, i have testing the circuit again.. i just want to check the pulse that trigger from output from LM555 A1..

i have found that when im increasing the frequency from function generator, the width of pulse from A1 also increase..

but, when im doing the simulation, the width of pulse remain constant even im increase the frequency..

can anybody let me know which one is the right concept?..
the hardware output or simulation output?..

thank you very muchh...

[Audioguru]

Originally Posted by nasz

i have found that when im increasing the frequency from function generator, the width of pulse from A1 also increase..

but, when im doing the simulation, the width of pulse remain constant even im increase the frequency..

can anybody let me know which one is the right concept?..
the hardware output or simulation output?

The width of the monostable pulse stays the same when the input frequency is raised. But the pulse appears to be wider because the total time period becomes less.

[marinara]

how about the width of the astable pulse from A1?..is it appears to be wider or remains same when frequency input increase?