This post will show you how to control your bicycle fan speed with your heart rate monitor. DIY KICKR Headwind Parts List ESP32 Dev Board Jumper Wires USB Cable 4 Channel Relay Heart Rate Monitor High Velocity Fan Schematic DIY KICKR Headwind Code https://github.com/agrabbs/hrm_fan_control Thanks to… Curious T!mo’s Video
Note: Currently working on a video of this how-to. Should be up in a few days. If you search for “raspberry pi ph meter” you’ll quickly learn that there are very few affordable options when it comes to digitally monitoring the pH of your nutrient solution. For a while Atlas Scientific dominated the search results, but I believe their kit was around $200 at the time. The kit has since come down to $164, but…