Recent content by papacap

GPIOPWM is what you want if you have it on an ssr. 1 Hz is good. That will make it half second on half second off at 50% duty for example.

When you look there (devices) it should appear as a number code such as 28-XXXXXXXeXXXX (X are numbers). Sounds like the pi is not recognizing it. Make sure you have 1-wire turned on via the RPI settings. Also is has to be on GPIO 4. Hope that helps.

Well in my case its a matter of rebuilding my prototype board (doesn't currently have a 3V rail) which is a decent chunk of work. I'm trying to get a sense of what risk I'm dealing with because I would certainly prefer rebuilding over burning my pi. If it does go bad will it just fry that one...

Somewhat confused by what you saying but it should be fine to pullup to 5v or 3v as long as you use the correct resistor value. The resistor just needs to limit the current to about 1 mA and the sensor will work fine. I have heard people say you should not apply 5v logic to the GPIO pins but...

Basically, take any old USBC cable and cut off the USB end of it. Strip the red and black leads and connect them to the 5v supply you were going to use (that Mean Well one is a good choice). Then plug the USB-C end into the pi for power. Essentially exactly what you were planning just via the pi...

As far as having the contactor before or after the ssr I am not aware of any advantage between the two (but i would be curious to learn if there is). Personally, I have the contactor as the last device before the element outlet. Regardless of where you place it, the other side of the contactor...

It all looks good to me. The only thing I saw is when it come to the thermometer be sure the resistor is between the data and 5v pins. You have the resistor in the right place with reference to the pi but the wire colors are slightly confusing. Generally the data pin is number 2 and marked...

Its possible that there are ways to wire the uln that I am not familiar with but mine is wired differently. Essentially I have the ssr+ connected directly to the +5v supply (or 5v on rpi). Then the ssr- goes to the output pin of the uln. When 3v is applied to the input pin. Current will flow...

To elaborate a bit. I use a 3 position switch to control the relay module for the pumps. The switch outputs are bridged and go to the relay. One input is a GPIO pin and the other is the rpi gnd pin (relays turn on when you apply gnd to the input pin of the relay and off with +5v). If this kind...

I am not an expert but I very recently did a similar build. Any breakout hat should work although personally I just prototyped onto a through-hole pcb and used some jumper wires. I'd recommend getting a relay module (like this https://www.amazon.com/dp/B0057OC6D8/) for the pumps. There's no need...

Thanks for that jangevaa. That certainly would have been nice to know about. Surprised it didn't come up with how much searching I did but its nice to have for the plug-ins. I'm glad it's now present on this thread for other users. I can't personally speak to whether that fork will circumvent...

I was able to get CBPI3 running today for the first time although I have not yet connected hardware. I cannot promise it actually works or if there will be more problems. I'm no expert but I will try to explain what I did. First, after much searching I think that the problem you have (and I...