Mobile Apps + Dev Talk
If you ve followed this blog, you know I have liked using MongoDB for a while until it went to a service model on big hardware. I ve written extensively about running MongoDB on Raspberry Pi hardware — from the Pi 3 all the way up to the Pi 5 — and it remains my go-to [ ]
I m frequently asked about running MongoDB on Raspberry PI. My old binaries, on this blog, no longer work as some required libraries have evolved and/or have lost support and distribution. All is not lost! You CAN run the latest version 8.0.x (as of mid-January 2025) on Raspberry Pi 5 with 8GB or 16GB RAM. I [ ]
As mentioned in my other posts, I like to use no-SQL, document-oriented, databases for my various projects. My favorite is MongoDB but that requires running Ubuntu OS on the Raspberry Pi. I also use CouchDB and it has worked nicely in single node configuration on various Raspberry Pi. I have compiled CouchDB from source in [ ]
A decent DIY Allsky Camera can easily cost over $400 USD to build. A low-cost Raspberry Pi 4B based system with HQ camera and wide-angle lens with enclosure will cost over $250 USD to build. If that price range is too steep for you, you might consider a very low cost option. It will not [ ]
A couple of months back, I put together an all sky camera system for the Martz-Kohl Observatory near Jamestown, in Western New York. An all sky camera provides a (near) 180-degree fisheye view of the sky. This project was a joint effort with other members of the observatory. One member supplied parts for the system [ ]
OR, for version 5.0.5 Create the log file and data directory. Change owner and group. Create the systemctl service file to stop/start mongod process and add the following lines: You can now start/stop the mongodb service (mongod). Remember to stop gracefully before rebooting your system!
Have a Raspberry Pi 4 with 4GB or 8GB of RAM and want to run the popular noSQL database, MongoDB? Read on for installing and running the latest 64-bit versions of MongoDB and Ubuntu 20.04. The short (TL;DR) instructions are to read and follow the official install guides for 64-bit Ubuntu Server 20.04 and MongoDB [ ]
What is MathTerms? Here is the description from the Apple App Store. MathTerms is an illustrated glossary of mathematics terms in English and Spanish. The free iOS app includes almost 500 entries for middle- and high-school mathematical concepts. To help learners master speaking as well as reading, it encompasses audio pronunciations of terms, by English [ ]
View your Raspberry Pi (Zero, 2, 3, 4) display on-the-go without VNC or prior configuration. Great inexpensive device for your toolbox! Laptop required 🙂 I have a bunch of R-Pis of various flavors. I also use R-Pi cameras (regular, IR and HQ) on a regular basis. I don t always know the WiFi or network config [ ]
This is yet another take on how-to create a time-lapse video. In my case, a website updates a photo of the sky on a regular basis. I wanted to turn that into a time-lapse video and deploy to another, or possibly the same, website. I decided to use a Raspberry Pi 4 that was sitting [ ]