A Raspberry Pi post for Pi day

I’ve recently fallen in love with Raspberry Pi computers again. The discovery of MQTT and io.adafruit.com for data logging lead me to Node Red. Node Red is awesome! It’s like scratch programming for things! For example. My fridge is starting to have some issues. It wants to keep freezing everything in the fridge. It dials […]

Sump Pump, Aquaponics & Aquarium water level monitoring

I seem to like flooding my basement… Usually by overfilling one of my aquariums, or intentionally putting 55 gallons of water in a 45 gallon aquarium. Sometimes, I overfill the swimming pool in the back yard. So I decided to put together a monitoring system. It will monitor my sump pump, letting me know when […]

Mobile Science Kit RPM Frequency Counter

I just came across an interesting use of a mobile phone for sciency things… a audio frequency analysis to count RPM. Another great video by Matthias Wandel, or what I new him from for many years before I found his youtube channel, woodgears.ca The premise is you find the audible frequency spike, combine that with […]