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1) you can use the internet to look this up
2) the process works better when you show the work you did
what is your circuit
what do you expect it to do
what does it actually do
what kind of help would you like
Actually I need indication of Pressure Sensor in CO2 Fire Fighting Control Panel.
When signal comes from pressure sensor the 24VDC LED should blink with 50% duty cycle.
Please let me know that in emergency fire fighting system what should be the LED blinking speed.