I just started an interesting new project: The Outmoded Sequencer Project. It is an minimalistic music machine. You can use a 8×8 “programming” matrix to create simple melodies which are looping endlessly. This melody can be changed while the device is playing it. Here a short demonstration: The device is divided into several parts as…
Category: Projects
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How Build a Beautiful Table Light
I just published a new project, how you can easily build a nice table light from a cheap candle holder you get in any IKEA shop. The project is using a NeoPixel ring and a Adafruit Trinket as microcontroller. The microcontroller is very limited, but you will find ready made software which will get most…
How to use the Scripts in the Cat Protector Project
It seems the cat protector project documentation has a small gap. There is just a hint that you have to use some scripts to prepare the SD card to play the audio files, but no details about this. To use the scripts you need some knowledge how to use a command line interface on your…
Data Logger Deluxe Documentation Online
Finally the a step by step tutorial, how to build the deluxe version of the data logger is online. I split the documentation into multiple parts: Start Page Overview Usage Parts Build the Hardware Build the Software Start reading here on the start page.
Data Logger Deluxe – Finished + Video
I finally finished the deluxe version of the data logger. The software took longer than expected, because of the tight flash memory limit. I created a short video which should give you an impression how you can use the menus on the data logger. The video is showing the menu driven user interface. It is…
Data Logger Deluxe Version Almost Done
Just to let you know the deluxe version of the data logger is almost done. The hardware is ready and tested – currently I finish the menu based software for the data logger. Menu based control with 5 capacitive inputs Record, view records, send records to serial, erase all, settings. Wireless charging.
Data Logger – Sensor Limits
After fixing the timing problem with the sensor library, I started the data logger and recorded data in 10 seconds intervals until the memory was full. This time the AM2302 (DHT22) sensor was read every time, no cached values were used. It created a really interesting data set you can see in the diagram below (click…
Data Logger Simple – Software Bugfix
After analysing recorded data from the simple version of the data logger, I found a problem I had to fix with a new release v1.1 of the software. If you look at this chart, which is showing data recorded in 30 second intervals, you can clearly see the values do not really change every 30 seconds. The…
Long-Term Test Finished
I finished my long-term test of the minimal version of the data logger project after a few days. To simulate the situation for the actual usage, I setup the data logger to record data in 1 hour intervals. The test answered these questions: Does the data logger function properly over several days? How much battery does the…
Data Logger Documentation Online
I just published the minimal version of the data logger project. The minimal version uses the built-in EEPROM of the microcontroller to log sensor data. I decided to create this additional minimal version because it works for very simple cases and does not need any external memory. The data logging mode is controlled using a…