Intakefancontroller
| Project Intake Fan Controller | |
|---|---|
| |
| Simple fan controller for switching our forced air intake. | |
| Status | In progress |
| Contact | thomas |
| Last Update | 2019-01-07 |
Why?
Sometimes the need arises to temporarily shut off our forced air intake fan. In the past we simply pulled the plug on the motor, but this naturally leads to people forgetting all about it until someone notices notices an uptick in CO2 concentration, often days hence. This box of plastic is meant to remedy that problem. Pressing a button will shut off the fan and set a counter. Another press will add more time to the counter. Once the countdown completes it will just start the fan back up, no fuss.
How?
To turn the fan off, press the button labeled 'UIT'. Upon first press it will set a delay of 15 minutes, and each successive press adds another 15 minutes to the clock (up to a maximum off-time of 2 hours).
If you want to reset the timer and/or turn the fan back on before the delay has elapsed, just press the 'AAN' button.
What's in the box?
An arduino nano reads the buttons, drives the display, and switches a bistable relay. It also pulls a pin high when the fan is on, which is routed to a nodemcu used for interfacing with revspace MQTT (work in progress).