Public projects 3

Control Up to 65,280 Relays with Your Arduino!

Project tutorial by Christian

  • 0 respects

Smart Irrigation Controller

Project tutorial by chuygen

  • 1 comment
  • 22 respects

Basement/Crawlspace Ventilation System

Project tutorial by chuygen

  • 41 respects

Toolbox 3

Replicated projects 0

 Christian hasn't replicated any projects yet.

Respected projects 2

IoT Treat Dispenser For Pets

Project tutorial by Arduino “having11” Guy

  • 48 respects

32-Band Audio Spectrum Visualizer Analyzer

Project showcase by Shajeeb

  • 109 respects

Comments 3

  • Basement/Crawlspace Ventilation System 16 days ago

    Thanks for the comments. I've discovered that every crawlspace/basement requires a slightly different solution. Only you know the optimum air flow requirements. The key is to move air flow from one end of the house to the other, to try and dry out the area efficiently. The more temperature/humidity sensors that you can place under the basement the better humidity/heat map you can get to properly monitor your air flow. I even did a test of automatically closing a vent which gives you even better control, but you have to weight cost vs performance. It's amazing what a difference two small fans make in the right place and turned on at the right time to efficiently remove the moisture from my crawlspace after it's been raining outside for a couple of days. It's a lot cheaper than running a dehumidifier for several hours under your house everyday.

    That's why I like the IO Expander because if I wanted to add additional temperature or humidity sensors under the house it's an easy 1-wire multi-drop and it will be running in 10 mins without having to add another 1-wire or sensor library to my Arduino. Sensors are cheap after all, but it should not be difficult to manage many of them.


  • Basement/Crawlspace Ventilation System 16 days ago

    Yes you could use this for controlling an attic fan. You don't want to suck in the air through the roof vents if the humidity outside is higher than inside or you will start having condensation due to the colder more humid air hitting the really hot inside attic air. There is no one solution that fits all, so I would recommend logging the performance and see what works best for you. When it's really cold outside I normally cycle every 20 minutes instead so as to allow the colder air to warm up, or I will be chilling the floor thus increasing my heating costs which is not what I want to do. Look at my wifi projects on my web site you can use the NodeMCU to log and monitor your results easily to your own web server. Thanks!

  • Basement/Crawlspace Ventilation System 18 days ago

    I had two different models lying around. I would recommend the one I have the link to for both. It is detachable also easily replaceable, but most importantly waterproof. You can get away with a cheaper DHT22 under the house because you don't expect it to become fully saturated but it's not really accurate at the end limits. Humidity sensors that become fully saturated require re-calibration because they tend to drift due to impurities and contamination. I built this ventilation system out of necessity and it's really worked well for me. I hope others can reap the rewards too. I first looked at one from Home Depot that was > $600, so I built one instead. Let me know how yours works. If you have any other questions just ask. The IO Expander really makes it easy to wire and build and lets you focus your time and energy on building your idea quickly. Thanks!

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