Hi
I would like to build a project, but I need your help regarding the below points in designing and choosing the right electronic parts. In this project I'd need the following:
Yes, I'm aware I'm interacting with main voltage - I'm a simple house electrician with legitimation. I'm just missing electronic engineering knowledge.
The concept is basic - to detect voltage and temperature. Based on a set threshold act on relays to turn them on or off independently.
It should be as compact as possible - Raspberry Pico would be a great fit for a final project.
Questions:
I would like to build a project, but I need your help regarding the below points in designing and choosing the right electronic parts. In this project I'd need the following:
- Minimum 5 temperature sensors - temp. range ~ 10 - 110 Celsius; wire up to 5meters long; domestic installation
- Minimum 8 relays - to turn on or off main voltage to different devices; up to 50Watts ~220VAC
- Minimum 3 main voltage detectors - to act on relays differently if I detect a voltage in external source; max latency 0,05 sec.
- small screen to show current status and change program settings - not "must-have" as I can run a HTTP server and access remotely.
Yes, I'm aware I'm interacting with main voltage - I'm a simple house electrician with legitimation. I'm just missing electronic engineering knowledge.
The concept is basic - to detect voltage and temperature. Based on a set threshold act on relays to turn them on or off independently.
It should be as compact as possible - Raspberry Pico would be a great fit for a final project.
Questions:
- Is it a good idea to run it on Raspberry Pico or 4? Will handle this task and amount of readings without big latency or do you have other alternatives that can be used?
- I believe I will run out of pins to connect so many sensors(even on Rasp.4). I've been reading about the "MCP23017" expander over I2C, but is it the way to go, or maybe it's better to use prebuilt expansion boards? Unfortunately, I didn't find much information on how to communicate and interact with this expander or in general with I2C using Python and Raspberry, so any suggestions, or documentation would be appreciated.
- Could you help me choose the right temp. sensors, relays, any remaining parts and build a voltage detector compatible with Raspberry 3v limitations?
Statistics: Posted by Frozen — Fri Sep 20, 2024 12:06 am