Water evaporation reduces water volume inside a marine aquarium, affecting the salinity. This guide will walk through the build process of a water level controller (also called as auto top off system) that employs a water level sensor to detect water evaporation and then turn on/off water pump to add fresh water. This guide builds upon the power controller guide.
This guide will walk through the build process of controlling AC equipment using an automated power strip (power controller). The power controller allows scheduled and on-demand control. Power controllers are simple and inexpensive to build and it acts as a foundational layer for temperature or water level controllers.
reef-pi is an opensource reef tank controller capable of automating day to day reef keeping chored including equipment control, temperature control, water level control, dawn to dusk light cycle. This is the first tutorial within the reef-pi tutorial series covering installation and configuration of reef-pi software on Raspberry Pi.
CircuitPython is the best new way to code microcontrollers. But what if you want to run that same code on a more POWERFUL computer like a Raspberry Pi (or really any Linux SBC?) Well now you can - take advantage of the wide collection of drivers and example code we have for CircuitPython and now you can run it right on your Pi!
Instead of a selfie booth, how about a selfie bot? This project combines a Raspberry Pi camera with an accelerometer and animated faces and sounds to create the illusion of an artificially intelligent "bot". Selfie Bot giggles when shaken, falls asleep when put down, and loves to take your picture! Use the animations provided, or create your own behaviors!
This fully-featured UDA1334A I2S Stereo DAC breakout is a perfect match for any I2S-output audio interface. It's affordable but sounds great! The NXP UDA1334A is a jack-of-all-I2S-trades: you can use 3.3V - 5V logic levels (a rarity), and can process multiple different formats by setting two pins to high or low. The DAC will process data immediately, and give you a clear, analog, stereo line level output. It's even cool with MCLK-less I2S interfaces such as the Raspberry Pi (which it's ideal for) - a built in PLL will generate the proper clock from the bitclock signal.
Everything you need to prototype an IoT device and connect it to Google IoT Core. This kit comprises a Raspberry Pi3, GPIO breakout cable, breadboard, cables and wealth of sensors and actuators. Google Cloud IoT Core is a fully managed service to easily and securely connect, manage, and ingest data from globally dispersed devices.
The PiUART adds a MicroUSB to serial connection so you can use any serial port software to connect to the Pi's console. It plugs in and is fast and easy to add whenever you need to connect to your Pi. You can power your Pi through the microUSB port and then use the switch whenever you want to cut power, without having to unplug the cable.
This project will turn your Raspberry Pi Zero W into an ad-blocking local DNS server with Pi Hole. When it is asked for the IP address of ads.adserver.com (for example) it will return nothing! So you will never even connect to the ad server and get the ad. Your connection will be faster, less data, and no intrusive ads. It works great on computers, tablets, phones, etc. Even if you cannot run an ad-blocker plugin on your phone or tablet, this will work and ad-blocker-detectors can't tell you're running it.
If you'd like a compact display, with buttons and a joystick - we've got what you're looking for. The Adafruit 128x64 OLED Bonnet for Raspberry Pi is the big sister to our mini PiOLED add-on. This version has 128x64 pixels (instead of 128x32) and a much larger screen besides. With the OLED display in the center, we had some space on either side so we added a 5-way joystick and two pushbuttons. Great for when you want to have a control interface for your project.
The Adafruit PiOLED is your little OLED pal, ready to snap onto any and all Raspberry Pi computers, to give you a little display. The PiOLED comes with a monochrome 128x32 OLED, with sharp white pixels. The OLED uses only the I2C pins so you have plenty of GPIO connections available for buttons, LEDs, sensors, etc. It's also nice and compact so it will fit into any case.