I just tested all pins on the old setup using like a shield and if the pin has voltage it is 4.6v no matter the pin. what are your thoughts? when the short occurred it blew a hole in the EC stamp I had originally on first board, lost communication with Ethernet module and ,PH, ORP no longer would re...

The old stamps do not work with the new board something has happened to them, I think there is voltage where it should be. I had to replace all of my stamps.

The image did not come up, the parts of the old Ferduino board that still worked the last time I had it running after the short happened as follows. the tft display the relays the level sensors the temp probes the LED control the stuff that did not work: Ethernet (no TX or RX) communication. PH, ORP...

I will have to get an arduino to use as a shield and test the board, I know that Ethernet does not work at all and issues with communication to stamps not sure about ULN chip. I tried one arduino that I had from another project but I did not work so I will try a new one and see if that changes anyth...

So I am thinking of building a feruino from scratch just so I can better understand how this all works together, I have had to ask so many questions and some of these things are so simple to work out , I need more practice with the wiring and understanding of the schematics, I will continue with my ...

Where did you fi d the adapter in the picture I would like to research it for my build.

Sorry just trying to make sure I under stand as I said before I am very new to this.

on ferduino mega how do I get 12v to pin 1, I have checked and only have 5v?

sorry Fernando I edited that after you saw it is there a pin on one of the other ports that connects directly to pin 9 of the ULN chip or do I have to weld it on the board?

How do I do that is there specific pin on 25 pin db connection or another place?
What else will that affect?

I will connect power +12 only to the fan then -12 to ground on RJ11 from the fan correct?

I only have 5v on the red line from the RJ11 jack you and I have talked about how get 12v through the board I just don't remember when I will look through the thread and find it.

I am being very cautious as I do not want to hurt this board, does the 12 volts go in line with the disable pin? As in parallel, or am I seeing that wrong? Then ground goes back the RJ11 jack.

looks great.

On RJ 11 jack pin 1 I have connect 12 power supply in line with fan then the ground goes back to the jack as well?

ok I see thank you.

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how do you make the connection to the fan?

pin 1 and 13 are (pwm) control speed, what for just on and off? fans with 3 pins are just on and off not pwm correct.

I just found that one, is this done through the coolers RJ 11 jack on the ferduino or an other way?

All has been working well for a week now, I do have a question how do you connect the cooling fans for the LEDs? My fans have 3 wires red, black and, yellow. I have looked through many pages and cant seem to find what I am looking for. A fan with 3 pins can only be turned on and off correct?

I must have set everything up right for web control because joy-reef is working for me now too, I will be back on track in no time at all. I do have to re calibrate all of my probes and get a new EC stamp though