Dear all,
I first have to state that I dont have lot of experience with electronics but I hope the information I will supply will be adequate to understand the source of my problem.
I am using the Cynergy UF Series flow sensor(Datasheet attached)
I use the sensor in NPN pulse mode and have connected the signal output to the Vcc with 10K Ohm resistor as suggested. I use one power supply.
I power up the sensor with 24V. However the signal outputs 8V in relation with the ground ( isn't it supposed to be 24V?). When the sensor is running the high is around 8V and the low around 7V.
It never goes close to zero. Using the oscilloscope I can see the pulses when water flows through it. Additionally, the led indicators are lit according to the datasheet.
However I want to use the signal as input in a digital module that recognizes from 2V to 5.5V as High and anything lower than 0.8V as Low. Lowering the Vcc voltage doesn’t help since the difference between High and Low is always lower than 1V and the signal is of no use.
Do you have any workaround on the issue? I don’t understand why the Low doesn’t get to ground.
I attach a schematic with the connections. (I am using a standard breadboard)
Please let me know if you require any extra information
Thanks a lot in advance for your help
Kind Regards,
Kostas
I first have to state that I dont have lot of experience with electronics but I hope the information I will supply will be adequate to understand the source of my problem.
I am using the Cynergy UF Series flow sensor(Datasheet attached)
I use the sensor in NPN pulse mode and have connected the signal output to the Vcc with 10K Ohm resistor as suggested. I use one power supply.
I power up the sensor with 24V. However the signal outputs 8V in relation with the ground ( isn't it supposed to be 24V?). When the sensor is running the high is around 8V and the low around 7V.
It never goes close to zero. Using the oscilloscope I can see the pulses when water flows through it. Additionally, the led indicators are lit according to the datasheet.
However I want to use the signal as input in a digital module that recognizes from 2V to 5.5V as High and anything lower than 0.8V as Low. Lowering the Vcc voltage doesn’t help since the difference between High and Low is always lower than 1V and the signal is of no use.
Do you have any workaround on the issue? I don’t understand why the Low doesn’t get to ground.
I attach a schematic with the connections. (I am using a standard breadboard)
Please let me know if you require any extra information
Thanks a lot in advance for your help
Kind Regards,
Kostas
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