Hello all. New to this platform but have dabbled in C years ago.
I will try to give you my application. Transmitters for things like PH, ORP and conductivity in the PLC world have ridiculous price tags associated with them. What I hope to get out of this Arduino project in the short term is cost effective transmitters to interface with my PLC project.
First and foremost is the PH probe system. ORP and Conductivity can come later as well as PWM In/Out.
Guess my question is can I use this project to get a usable 0-5 volt or 4-20ma signal to use with my PLC projects.
Hope you are all able to help.
sensors are not expensive.
sensors with extensive testing and commercial enclosures cost more because of the research, design, engineering and manufacturing.
but, if you look, many times the sensor is the same as you buy.
so the sensors are not expensive, the packaging is.
Please post your PLC. there is no reason you cannot use a $5 e-bay sensor with a PLC or a $2 one for that matter.
the ADC input is your real goal. if the PLC cannot accept a high value signal, then it is worthless. check other intputs. the TEENSY has a high bit ADC and can output serial. even a cheap PLC should be able to accept the serial input.
but, if your PLC has an 8bit Analog in, the Arduino will not give you an better accuracy than if you connect the sensor directly.