Help with Relays-2 [SOLVED]

[Juan Macchi]

Hi Fernando,
I'm trying to wire the relay-2 but I can not. can you help me? I have doubts about where to connect the 5v and 12v on the relay.
I have to feed ferduino mega with the 12v?
Thank you

[Fernando Garcia]

Hi!

What's the specification for this board?

The relay works with 5 v or 12 v?

You can power the Ferduino M. with 12V, but have to add a fan to cooling the 5 v regulator.

Best regards.

[Juan Macchi]

It should be 5v

[Fernando Garcia]

Hi!

Connect 5 V to VCC, GND to GND, P0 to IN1, ..., P6 to IN7 and P7 to IN8.

Best regards.

[Juan Macchi]

hi!
I tried to do as you told me, but the relay remains off.
I took some pictures.
do I have to change the code?

thank you!

[Fernando Garcia]

The wiring seems wrong to me.

Check the pin map again: http://ferduino.com/wp-content/uploads/ ... PinMap.pdf

Also try first with test code for PCF8575 available on forum.

[Fernando Garcia]

This relay board is low or high level trigger?

[Juan Macchi]

high level trigger!
I used another one (not solid state) and it works.
Is there a way to use those high-level solid state?

now I would like to use one of the pins available on the pcf8575 (I think 13, 14, 15) for the heater.
Should I just replace the pin number on the line "const byte aquecedorPin = 42; // Pino que liga or aquecedor" or do I have to do anything else?
I also noticed that on the LCD the heater(riscaldatore) is always on even if the temperature of the probe is over 26 degrees. It's correct?

[Fernando Garcia]

To use a high level trigger (active high) you should remove the ULN2803 as explained here: viewtopic.php?f=6&t=100

Should I just replace the pin number on the line "const byte aquecedorPin = 42; // Pino que liga or aquecedor" or do I have to do anything else?

Is needed change other lines. This SSR is rated in 2 Amper it's enough for your heater?

I also noticed that on the LCD the heater(riscaldatore) is always on even if the temperature of the probe is over 26 degrees. It's correct?

Not, you are doing something wrong because heater and chiller can't stay ON simultaneously.

Default code prevents this behaviour.

Code: Select all

    if ((bitRead(status_parametros, 0) == true) &&  (bitRead(status_parametros, 1) == true)) // Evita aquecedor e chiller ligados ao mesmo tempo.
    {
      bitWrite(status_parametros, 0, 0);
      bitWrite(status_parametros, 1, 0);
      myDigitalWrite(aquecedorPin, LOW);
      myDigitalWrite(chillerPin, LOW);
}


[Juan Macchi]

thanks Fernando,
I decided to use another relay which is 10a. can you explain to me what I have to change?
for the problem of the heater and the chillers that go together. I installed the code without any changes but the problem remains.
what can it be? I also disconnected the probes.
thank you

[Juan Macchi]

I do not know why but I set again the temperate and now it goes

[Fernando Garcia]

Hi!

Remove this line from setup:

Code: Select all

myPinMode(aquecedorPin, OUTPUT);


Change all lines like this:

Code: Select all

myDigitalWrite(aquecedorPin, HIGH);
myDigitalWrite(aquecedorPin, LOW);


To:

Code: Select all

PCF8575.digitalWrite(aquecedorPin, HIGH);
PCF8575.digitalWrite(aquecedorPin, LOW);


Change:

Code: Select all

const byte aquecedorPin = 42;

To:

Code: Select all

const byte aquecedorPin = 13;

Best regards.

[Juan Macchi]

thank you! it works perfectly.
now I was trying the pin for the skimmer but I can not make it work.
it should be pin 12 but it is always off.
Do I have to make any changes?
I would like to make it work with the sensor that turns it off if it goes up the sump level.
which sensor uses this function? looking in the code I understand that the sensor 3 but I think it is also the same that turns on the pump of the recovery tank (see from the LCD).
it's correct?
thank you!

[Fernando Garcia]

Hi!

Just uncomment this line:

Code: Select all

//#define DISABLE_SKIMMER

Best regards

[Juan Macchi]

thanks Fernando. it works great.
I'm studying the settings of all the pins. I
have doubts about the pin "bomba1Pin = 2; // P2 // Bomba que tirágua da quarentena" and "Bomba que coloca água no sump". Do they have any automatism? they remain off.
I think it has one of the two to connect the return pump from the sump to the aquarium.
I also doubt the wave maker pumps. I'm using two jebao Sw-4s. is it possible to modify them to make them function in pwm like jebao-wp? otherwise I can connect them to relay-2 and control them with the output?

[Fernando Garcia]

Do they have any automatism?

Just search for "bomba1Pin" on code to find related function.

There's many topics here talking about partial water change please search a bit.

Friend, I think the initial issue was solved for others questions please create a new topic.