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Hello i will make RS232/RS485/USB Modbus RTU / MBUS converter. This is small part of a big project. Because of that I can't use one of retail products, but i can use their MBUS circuit. I don't want to design original circuit, MBUS is already been here for years. I think there is some working...
@davidjamesriding: Thanks. I know that small circuit but i dont think it can handle 50 slave modules. But i dont want to use another modules, i want to make it, not buy it.
@FvM: Very good reference for me. But there is lots of component on it but i will try.
If there is anything for me...
Hello everyone.
I will work on MBUS master project in nowadays. I want to read 50 slave mbus calorimeters. Every meter has own battery.
So can you suggest me working master circuit about that?
Thanks!
I use microcontroller (STM32F072) to do boost voltage. But this microcontroller works with 3.3V so I use one mosfet driver (TC4427) for driving 200V mosfet. My inductor value is 330uH and output capacitor is 4.7uF/250V. Of course boobst converter diode is 200V schottky.
This is my Nixie Tube Clock.
First I want to use USB to get power and communication.
I used STM32F072 48pin series. It has internal RTC and yes, crystalless USB!
I wrote PID algoritm for 5V to 170V converter and bingo, i did it with classical boost converter and around %98 duyt cycle!
For more...
This is my Modbus RTU library for small microcontrollers. It supports 3-6 and 16 messages. Easy to use, easy to port!
Language is Turkish but you can also use github for this library.
https://www.firatdeveci.com/petit-modbus-kucuk-ama-dev/
https://www.firatdeveci.com...
When you design project with line connected you have to be careful about isolation. Otherwise you can say goodbye to your USB ports or even your computer!
If you use RS232 or RS485 communication you have to get one of isolated converter with USB input and yes they are not so cheap!
So i...
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