A Reef-Pi that can run up to 8 dosing pumps

[Jhollowell41]

Aquatek regulator. 24" Finnex planted plus, only using on/off mode. This is my first FW planted tank. I had a reef tank about 20 years ago, kept all the equipment. Always wanted to use an aquarium controller for my reef back then but they were too expensive. I plan to re-start a reef soon since I have found Reef-Pi!

 

[RobertoRC]

I have a question regarding the dosing pump configuration, in the REEF PI guide there is the configuration of the perma proto board for two dosing pumps but I need just to configure one. So I was wondering if the configuration we need is just the right part of the photo I'm sending you. With these I mean if we can avoid the white coloured part for using just one pump. This is also because in the white coloured part we are using it for the temperature probes and SDA and SCL for the lights and pH. If its not like that how can I make a circuit for just one? I saw that the first pump is controlled by the pins 5 and 22 for the direction but its not clear wich PWM (18 or 19) pin is being used for this pump, with these I mean what parts can avoid from the circuit to just have the configuration for just one pump? Thanks for your help!

 

[Wayne1712]

Hi, I've followed your build but am having issues getting the pumps to work. Would you mind having a look at my thread and let me know what I'm doing wrong please.
https://www.reef2reef.com/threads/help-with-reef-pi-doser-please.626517/

 

[Ranjib]

I have a question regarding the dosing pump configuration, in the REEF PI guide there is the configuration of the perma proto board for two dosing pumps but I need just to configure one. So I was wondering if the configuration we need is just the right part of the photo I'm sending you. With these I mean if we can avoid the white coloured part for using just one pump. This is also because in the white coloured part we are using it for the temperature probes and SDA and SCL for the lights and pH. If its not like that how can I make a circuit for just one? I saw that the first pump is controlled by the pins 5 and 22 for the direction but its not clear wich PWM (18 or 19) pin is being used for this pump, with these I mean what parts can avoid from the circuit to just have the configuration for just one pump? Thanks for your help!

Hi , you are right , you don’t need all the recommended wiring if you want to control only one motor, but your wiring is incorrect. Instead of the one you have shared , you need to use either the left or right side of the l293d ic. For example , you can only use the in1,in2 , en1 to control the direction and speed (connect motor to out1, out2)

Let us know if you have any issue, I am traveling (in instanbul now) but I’ll surely get back