This circuit will create a triangual shape signal, a close approximation of an analog singla (some a DAC like ADS1115 will generate). While this helps, in my experience, 10V PWM works just fine for Kessil, as long as theres not other aberrations
AFAICT most are basically like the above w/ its R/C filter circuit to smooth the output to analog..
Problem is it's reversed if I remember correctly..
Increasing duty cycle decreases voltage out..
https://www.eevblog.com/forum/projects/0-10v-led-driver-control-with-microcontroller/not my forte.. but also pretty sure Kessil is 10V analog..
retail.. ;)
Amazon product ASIN B00U7GJDVOIt's confusing.. :(
http://www.bristolwatch.com/ele2/dac.htm
This will be awesome. We dont have to deal with DACs then. It will be nice to even just have a breadboard based op amp circuit for others to learn.@sjeff35 You should be able to use it with the lights circuit from Ranjib's guide. Here's how I think I would connect it.
The board oreo5457 linked should also work, but it seems a bit expensive for a single channel conversion. I think a single op amp can get very close to the desired signal too. I've been tinkering with milling circuits lately, and here's a 2 channel converter I'm working on. I'm still trying dial it in.
That's a good idea. I'll also modify this design to be breadboard-friendly.
You definitely can. Anything that's available through reef-pi's API is available to home assistant through the rest sensor, including turning equipment off and on. Kudos to @Ranjib because so far the API integration has been flawless.
I've not used NodeRed but it should be fairly straightforward. Here's an example of the entry in sensors.yaml that gets the sysinfo:
- platform: rest
name: ReefControlPiSysUptime
username: !secret reefcontrolpi_username
password: !secret reefcontrolpi_password
authentication: basic
json_attributes:
- name
- ip
- uptime
- cpu_temperature
- version
resource: http://reefcontrolpi.local/api/info
headers:
Connection: keep-alive
content-type: application/json
Referer: http://reefcontrolpi.local/
Cookie: !secret reefcontrolpi_cookie
@sjeff35 You should be able to use it with the lights circuit from Ranjib's guide. Here's how I think I would connect it.
The board oreo5457 linked should also work, but it seems a bit expensive for a single channel conversion. I think a single op amp can get very close to the desired signal too. I've been tinkering with milling circuits lately, and here's a 2 channel converter I'm working on. I'm still trying dial it in.
You should totally try that. Reef-pi 3.0 has file based driver that you can use to read the flow values with your prototype code and just write it in a file , reef-pi can then read that value and tray it as ph or general purpose analog values that can be used to control any thing you want
Use a 12v power adapter to directly power the pump and then control the power adapter as any other equipment in the ato module
Wow! That's a lot of relays!
