Current Output of 4-20mA from PC

hi. I have 6+ years of experience in interfacing analog and digital IO devices with PC using C#. I'm very interested in this task. let's discuss further on chat. waiting for your response...

Hello, My name is Andrei, i am a Romanian IOT Developer with a lot of experience in IOT projects and automatics . I have read your requirements , i know very well the solution , i propose you a micro controller based solution with serial . I can work with all types of Microcontroles programming in C , C++ , Mikro C , CCS C , Atmel Studio , Arduino , gcc . Creating Schematics and PCB in Kicad , Eagle , EasyEDA and Proteus (+simulation). i have an workshop full of parts and the infrastructure to build PCB and test the solution end to end using special tools (Spectrum analyzers , oscilloscope , logic analyzers ) Derivable on the project : Wiring diagram for prof of concept . Schematic design PCB Design Gerber files for manufacturing MCU code explained every line . C# software for the computer Regards, Andrei

I can do this job in Labview for Windows computers. You should buy a separate data acquisition hardware. Please let me know if you willing to discuss this option, Nicolae

Professional Eplan electric p8 user. Electrical engineering. Project management. PLC programmer. Scada designer.

I propose that a small PCB would be designed and provided that would contain a micro controller, USB input and a current controlled output - this would be connected to your small server Yellow - I’ve not done this before but if you send over the tutorial I’ll happily take a look - lots of experience debugging windbg / soft ice etc I am a time served C++ programmer (20 years in industry) and have excellent previous experience in developing on both Windows and Linux as well as embedded programming. I have designed and implemented many custom PCBs and have full prototyping facilities at my disposal for rapid turn around. Many thanks in advance Regards Matt Brock, Warton Circuits Ltd (UK)

Essentially you only need a cheap 5V arduino for few bucks and a resistor (depends a bit on how mach voltage will drop down on the current sinking side (the one that uses the created 4 to 20 ma), so if about 0 to 4 v are enough a single resistor and a perhaps a capacitor for better precision should be good enough) just connect the R between Vcc and any analog pin and the C from the Pin to the ground. R = 4V/20ma = 200 Ohm.A rather trivial arduino program, measuring the dropdown voltage on the resistor and readjusting the Voltage on the analog pin is needed and thats it ... Of course it depends on the precision and temperature stability you need, so you might need a few more components, but that solution should be enough in most cases. And talking to arduino from your program is as easy as writing to virtual serial port. Hope that helps Peter