Pump + Relais + Decoupling
Picked up the hobby again
I would like to build an irregation system with a pump, 4 valves and a sensor to easure the total amount of water in a tank.
I have found some sketches to help me with the problem. So I hope this would not be the problem.
I now have tried the relais sketch on my doormagnet (other project), and after a while it will fail (probably noise causes the problem)
My system is:
radio NRF2401 PA/LNA
NRF24L01+ Socket Adapter Board
All of this are connected with jumper wires and the arduino + radio are fed seperatly with a charger.
Before I try to build the irregation system I would like to know if there is a good method to calcuate the size of the decoupling capacitor. And where do I have to put it. Do I have to put it on the 230V side, or also on the 5V (on the relais board)
Hope too get some aswers here, thanks in advance
@Naitsirhc Since you are using the amplified Radio (PA/LNA) with the socket adapter board he decoupling for the radio should be fine. There are a few discussions on the forum on what kind of problems you can encounter.
First suggestion I have is lowering the transmission energy
#define RF24_PA_LEVEL RF24_PA_LOWand make sure you have a sufficient supply (not the on-board ldo of the nano or an FTDI adapter).
@Naitsirhc welcome back
Whatever you do, DO NOT put the capacitor on the 230V side. Doing that will be very dangerous.
Does the relay board have an optocoupler?
Thanks for your answers. Unfortunatly I didn't have time to check your answers. I will keep in touch
I promised to keep in touch....
I have disconnected the radio from the Arduino, so the radio is fed through a seperate stable 5V.
And also the relais board is fed seperately.
It runs for a cuple of days and it seems to work well. Time to move on.
To see if the magnet is working or not, I decided to connect a RGB led. When I connect the led, the board is going bonkers. The led is connected on D5 and D6 and the other side to ground (via a resistor)
Anybody a clue?
Maybe it's not related, but shouldn't you have a resistor for every color pin of the rgb led? (unless you turn on one color at a time)
Thanks for your quick reply.
The led is indicating one colour at the same time. Green for open and red for close.
I can give it a try to have more resistors connected...
I just remember it from the learning kit it had one resistor for every pin of the colors, but I actually don't know if it can cause issues.
@Naitsirhc could you describe what you mean by "going bonkers"?
Going bonkers is probably not the right word. I actually meant that the owner, and especialy his wife, are going bonkers
What I meant is:
When I connect the led: (red = D5, Green = D6 and the ground is connected through a resistor of 1K.) When I turn on the relay it's answering for aprox. 5 minutes and than it crashes.
I can only reanimate it by turning off the power
@Naitsirhc there are no crashes if you disconnect the led?
Again, thanks all for answering
Until now its working 2 days flawlessly.
Unfortunatly the sensor stopped working last night. I have ordered a relais board with opto coupler....
I will keep in touch