Over Engineered

[...] sensors, a push button, a temperature sensor, and a motion sensor (with controllable power).  I built the circuit on protoboard since it is a one-off [...]

[...] circles that indicate a magnetic door sensor, I determined that I had 3 door sensors, a motion sensor, a panic button, and a siren. I started off by checking the resistance of each zone loop with [...]

[...] I've been continuing to experiment with the pressure sensor from the previous post. I had a problem for a while where the pressure sensor results were [...]

[...] I've been working with the pressure sensor again. I finally got a very ugly prototype of a hand-held meter built. The basic idea is that [...]

[...] that fixed my air leakage problems, but now I'm having trouble with the accuracy of the pressure sensor. Here is some of the data I got during my last test session: SG test solution -> ADC [...]

[...] I did some more work on pressure sensor testing, this time with a MP3V5004 sensor which has higher accuracy than the MPX5010. This [...]

[...] I've spent some time recently polishing the Security Node demo I made a while back to the point where it is no longer a demo.  It's now installed [...]

[...] !  Thank you caitsith2, who ever you are! Now I just need to integrate this with my security node... [...]

[...] I created a demo recently to show off the security node I've been working on implementing using JeeNodes. This is not the final version (though the [...]

[...] I made a second run on my scale tester.  This time I used a 10KOhm thermistor as my temperature sensor.  This gave me around 0.15 degrees (F) of resolution, compared with the 1 degree [...]

[...] ; I think one improvement I can make (which I mentioned in my previous post) was that my temperature sensor has pretty low resolution (about 1 degree Fahrenheit). I suspect that having a sensor with [...]

[...] . The hardware consists of a JeeNode attached to 3 magnetic door sensors, a push button, a temperature sensor, and a motion sensor (with controllable power).  I built the circuit on protoboard [...]

[...] that there were files missing, namely houseagent.conf.  I grabbed these files from the git repo and put them in the places the error messages referred to.  The next error I had was that the [...]

[...] up and running. Node-Red ships with a pretty good set of basic nodes, but there is also a git repo that has even more nodes, so I thought I'd try that out.  I installed the extra nodes by [...]

[...] the Arduino to the Nexus.  It detected the new USB connection immediately and launched the Android app, and I could see my integers happily printing! I then modified the example app to include a [...]

[...] interface with the 'bot, but we ran out of time to implement that.  The beginnings of an Android app to interface with the 'bot is here. An instructable with construction details is here and [...]

[...] . While the MyMedia channel worked well, it needed a very particular video format, so I wrote a python script to transcode the video that NPVR produces automatically for me.  The script monitors a [...]

[...] ;Of course, this is exactly what computers are made for. The test set up consists of a python script running on an old laptop.  The script communicates with the scale via its RS232 [...]

[...] and trivia games for months now. And now you get the benefit of all that work in the form of source code and schematics: main project source code schematic (sorry, it's hand drawn) bill of materials [...]

[...] "cheatsheet" with all the commands to attach inside the keypad panel I've update the source code in my github repo. I'm pretty satisfied with how the Security Node turned out but I have some [...]

[...] for scale, Arduino with TMP36 sensor, MyWeigh HD-300 scale with 55 lb test weights I put the source code for the python test script and the Arduino firmware on github.  Keep in mind that the [...]

[...] , but it is also MUCH more expensive ($40-50 per sensor). So I'm going to try some other specific gravity measurement ideas before I invest money in the pricey new pressure sensor. Lately I've been [...]

[...] To further the experiments I've been doing with measuring specific gravity, I needed to take long-term continuous weight measurements (5-10 days total). I started [...]

[...] data logger for this project which will convert weight and temperature sensor readings to specific gravity. There are still some unknowns here.  One is that the test runs have only been run on a [...]

[...]  The sketch polls all of the inputs every 2 seconds and sends out a packet with the sensor readings.  It also checks for received packets that contain one of two commands: to power [...]

[...] here for more info. Mobile-friendly interface Cons No built-in UI No built-in database for sensor readings, though there are nodes to interface with various DB formats [...]

[...] for the robots via a 7 inch Android tablet.  The tablet was supposed to display things like sensor readings and play videos and music when the robots went into dance mode.  In the end we didn't have [...]