Code: Select all
Brandon92 wrote: ↑Sun Dec 30, 2018 8:21 pmOkay, I get a idea of what you want.
What for kind of leds are we talking about. The standaard 5mm leds?
So, in your current design you have 4*8 =32 outputs. And that's more than the Rpi can provide. This means that you need to add a i/o expander like the mcp23017. That will give you 8 extra inputs/ outputs. So when you are using for example 4 of them, you have 32 outputs and it only takes 2 outputs of you Rpi.
A other option would be that you connect the relays "direcly" to the rpi (with additional hardware) and that you are using addressable leds. This will save you a lot of outputs of your Rpi.
By the way, do you have experience with soldering parts and pcb? Then we know if you need something that exist or that you can make it by yourself.
Your correct. This is indeed the 16 I/O version. So, you only need two.mikronauts wrote: ↑Wed Jan 02, 2019 2:03 pmFyi,
The MCP23017 has 16 i/o pins, so only two are needed.
Brandon92 wrote: ↑Sun Dec 30, 2018 8:21 pmSo, in your current design you have 4*8 =32 outputs. And that's more than the Rpi can provide. This means that you need to add a i/o expander like the mcp23017. That will give you 8 extra inputs/ outputs. So when you are using for example 4 of them, you have 32 outputs and it only takes 2 outputs of you Rpi.
So, I can asumme that you don't have (much) soldering skills. And you prefer "extension" pcb that are (almost) done. And you only need to connect the wires between them. What is possible offcoure and I would suggest you to take a look at the following parts:Franita wrote: ↑Thu Jan 03, 2019 8:30 pmBrandon92, I'm VERY VERY new to the Pi as in this Christmas new and I'm just learning "Python" . Although I did in the very very distant past program using basic and machine code on my Amstrad 464 and I have dabbled in electronics in the same era, so I'm very very excited to get back into these hobbies.
I purposely asked about 16 channel relays but only using 8 of them on each board because I was future thinking and was hoping to incorporate the remaining relays into my garden as in lighting some other parts or expanding my water feature.
BoyOh I will give you a few tips, but not do the research f or you. All you want to know is on the WebFranita wrote: ↑Tue Jan 15, 2019 7:13 pmHi Boyoh, unfortunately you are quite right as to the solenoids being sluggish. I connected the solenoid to my pump and opened it using a 12v transformer and the water just dribbled out. I'm looking at a height of about 6" to 9". I now have to find a solenoid that will allow the fast flow of water, I'm also thinking of using a central heating pump because these pump water all around the house. If you have any suggestions regarding the water flow I'm all 's .
I'm very very new to the Pi and Python. Although I did program in Basic 20years ago . The electronics part is getting above my head although I have dabbled in electronics 20yrs ago it was extremely basic. I wished you lived down the road, because I'd be knocking on your door lol
Franita wrote: ↑Wed Dec 26, 2018 4:34 pmHi everyone,
My question is this......
Can I control 4 "16 channel" relay boards
Here is what I want to do....
I want to make a water feature in my garden with 16 water jet's and around each jet 3 coloured lights "red-green-blue" that's a board for each colour.
Pi picks a random number for the water jet and then picks a random colour (0-2:red-green-blue) but the jet has to be the same as the light.....so jet =4, I need 4 to light on 1 of the colour boards.
Hope this makes sense.
Franita wrote: ↑Wed Jan 16, 2019 12:21 pmHi tlfong01,
I have had a look at the links you provided and from what i can see the board you suggested does seem easier to program, But I want to use 12v 16 channel relay boards to control 12v decking lights and 12v water pumps. the "PCA9685" you suggest only seems to do 4v LED's and Model servos. is there a way to control the 12v 16 channel relays with it..
I believe that this is done before on this forum. And I unfortunately haven't not the time to search it.