I need to convert 12v analogue signal 1 second to pulse signal 12v les than 0.5 second

Thread Starter

Atturkawi

Joined Sep 22, 2022
6
Hello All

I need to convert 12v analogue signal 1 second to pulse signal 12v les than 0.5 second ( adjustable milliseconds <1 sec to )

if there is any adapter to do that like (555 timer )
 

Thread Starter

Atturkawi

Joined Sep 22, 2022
6
Hi Att,
Welcome to AAC.
Do you something like this Option.??
E

Added: R and C timing values image for 1mSec to 5Sec

View attachment 276730View attachment 276731
Hi ericgibbs

Thanks a lot for replying
I will try that

to clean the situation I connected the car horn with the door luck actuator because my car doesn’t make a sound when I locked it by keyless remote so I took a signal from actuator to Relay then connected to battery and horn to let me know if the car locked

I thought the time of beeping 1 seconds but actually it is about 250 or 290 milliseconds
I need to make it 50 milliseconds to 90 likes the normal time of beeping alarm for the other cars8F0FCB2E-82B8-4756-AF2B-66CFAE52E920.jpeg
 

Thread Starter

Atturkawi

Joined Sep 22, 2022
6
Hi Att,
Welcome to AAC.
Do you something like this Option.??
E

Added: R and C timing values image for 1mSec to 5Sec

View attachment 276730View attachment 276731
last update

I couldn’t delet myprevious reply

so I record the Tone sound and calculate the duration time of the existing Tone 610 milliseconds
I need to make 555 timer circuit to generate a pulse with duration time 90 to 140 milliseconds

please show the picture

no 1# the duration time of the signal 610 milliseconds

no 2# & 3# what I need
C36D0E31-7BA7-4261-91F8-3A4635DEC76D.jpeg
Sincerely
 

Jerry-Hat-Trick

Joined Aug 31, 2022
159
I wonder if something along the lines of my suggestions in https://forum.allaboutcircuits.com/threads/automatic-round-movements.188954/ would work?
1663928713950.png
You don't need the microswitch, not part of your problem, take out R5 and make R3 zero (i.e. direct link). Substitute your horn for the motor. The idea is that when your pulse turns on Tr2 the horn will sound until C1 charges up to 0.6V so Tr1 turns on which grounds the base of Tr2 turning the horn off. You can adjust the "on" time by changing the value of C1. To reduce the loudness of the horn I'd connect a resistor between it and the collector of Tr2, which also helps by reducing the current in Tr2 so larger resistor values and a lower capacitor value will suffice.
 
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