Hi I am completely new to arguing and am extremely excitedt to get started with my first project!!..; P
The aim of my project is to control four LM24A-SR zone damper using a timer script on the arduino uno.
Two of the dampers will be fully open whilst the other two will be fully closed and for then to alternate every 12hrs.
I would also like to be able to change these time using the lcd+push button shield and for the land to display the correct time and temp(using the ds3231 rtc.
Hardware parts u have so far:
• Arduino uno
• DS3231 RTC
• Expansion shield
• LCD+bush buttons shield
• Four module relay board
• 4x LM24A-SR
Once again I’m a real novis and am extremly greateful for any and all valuable pieces of information!!!
Many thanks
I realise that I will most likely need to use a 4-20 mA current loop for this project to communicate through the arguing uno to the damper sensor whilst powering in the actual Dampar motor we have an additional 24 V power supply.
However will I need to purchase an additional 4-20 mA current loop transmitter and the receiver or can this all be done from the Arduino uno.
Again many thanks to any and all thoughtful replays!..; P
Thanks for the reply, yes the Belimo LM24A-SR is a 0-10v signal actuator and powered by 24v either DC or AC and can also be operated with a 4-20ma signal which I thought would be the best option for Arduino as a controller.
I planned on putting out the 24v dc to the 4x relays board to schedule the motors of the 4x actuators power ON/OFF
Arduino uno would be powered separately...
I would then send two signals, one being sent to 2x actuators at 4ma/closed whilst the other is sent to the other 2x actuator at 20ma/open and for the signals to also alternate when scheduled, every 12hs...
Could you please give some details on how I would accomplish this, and or if the 0-10v signal would be easier to create??
Again many thanks
Okay yeah that makes a lot of sense thanks a bunch for the helpful info!
So am I right in thinking I would need a DAC and an op amp and I would then write to 0v and the 10v output signal into the script code...
Will I use the signal duration alone to schedule the open/close time of the actuator written in the code?
Will I use a relay to schedule the open/close?
And will I be able to adjust the schedule open/close time using the LCD KEYPAD SHIELD or will I need to adjust the scheduling open/close in the code only??
I know I have a lot of silly questions lol, I’m very greateful for your help!!
Thanks for the great advice, as always it sounds so simple once explained lol...
So am I right in thinking I would then need a 24vdc supply for actuator, a seterate 10v for signal and a further 5v supply for the Arduino uno?
Or could I possibly use the 24v supply and somehow come off it with two step downs, 10v and 5v?
I feel I’ve almost grasped the consept with these few bits of golden info!... thanks a bunch!