# Integrate pulsar signal and PWM

Joined Mar 20, 2023
4
Hi everyone,

I'm using CS+ software i am getting PWM signal when i connect to the oscilloscope but the same thing if i connect to the vehicle i am not getting the PWM signal where i am getting only pulsar coil output

#### Ian0

Joined Aug 7, 2020
10,020

#### LowQCab

Joined Nov 6, 2012
4,199
What is the "Load" that You intend to drive ?,
What are You using to drive the Load ?
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Joined Mar 20, 2023
4
What is the "Load" that You intend to drive ?,
What are You using to drive the Load ?
.
.
.
solenoid

energize when the vehicle certain RPM and de- energize when the RPM decreases

microcontroller - R5F10BAC

#### LowQCab

Joined Nov 6, 2012
4,199
What are You using to control the Power to the Solenoid ?
How many Amps of Current are required to operate the Solenoid ?
What is the Impedance of the Solenoid ?
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.
.

Joined Mar 20, 2023
4
What are You using to control the Power to the Solenoid ?
How many Amps of Current are required to operate the Solenoid ?
What is the Impedance of the Solenoid ?
.
.
.
12V power supply is given where if the RPM is 3000 it has to energize and generate PWM with duty cycle Ton = 80% and denergize where the RPM is 1500 Toff = 75% to regulate the power supply.

And the solenoid can withstand upto 5 Amps.

resistance = 2.7
rated voltage = 14.3
current for initial actuation = 4.5A
Time for initial actuation = 64ms
continuous current for holding = 1.5A
Available power on vehicle = 12V

And with the help of pulser coil RPM is calculated and 22 pips is generated in the CRO but the same if i integrate in the vehicle i am getting only pulsar signal and not the PWM signal

Last edited:

#### LowQCab

Joined Nov 6, 2012
4,199
I'm guessing ..........
A "Pulser-Coil" is an "Ignition-Sensor" ?
and,
"22 pips" is 22 "Ignition-Pulses-per-Second" ?, which is probably 1,320-RPM ?
and,

"" but the same if i integrate in the vehicle i am getting only pulsar signal and not the PWM signal ""
I'm sorry, but I can't understand what this sentence means.

What are You using between the Micro-Controller and the Solenoid ?
A Schematic or a picture would be very helpful.
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#### BobTPH

Joined Jun 5, 2013
9,137
Sounds to me like you are sending a signal level PWM to the solenoid, which does not have the current capability to drive it. If this is the case, you need a MOSFET to drive the solenoid coil.