tsyd
Joined 16 years ago
Karma
49
Submissions
14
Member since
Jul 29
Recent submissions
Comment · 6 years ago
Comment · 7 years ago
> The petrodollar hypothesis is a myth. The United States, now a net oil exporter, does not depend on Saudi oil.
The notion that the United States does not depend on Saudi oil (or that it's energy independent) just because it's a net oil exporter is a myth. Not all crude oil is equal. The US has an abundance of light oil which it exports but it still imports a lot of heavy and sour oil from OPEC and Canada.[1]
Comment · 9 years ago
> Why not just run InfluxDB and Chronograf on one of the CHIPs?
I started off with a single C.H.I.P. and ran everything on it but then when I added a second C.H.I.P. I wanted to have all the data in a central location. I also found Chronograf lag a lot when trying to browse more than a couple day's worth of data. The Raspberry Pi has much faster storage and CPU.
> How are you sending data to the Pi?
The C.H.I.P. has a Python script that runs on a cron that calls a C program to read the sensor and then sends it to the Pi using InfluxDB's HTTP API.
Comment · 9 years ago
Nothing in particular. I just wanted a way to view the temperature and humidity in my apartment when I'm out. Also I wanted to know what affects the humidity in my apartment and by how much (for example, you can see when I take my morning shower). In the future I may use the data to control a humidifier to turn it on whenever the humidity drops below a certain level.
Comment · 9 years ago
This was my first electronics project as well and I chose the Honeywell sensor because it has decent humidity accuracy (which is what I was mostly interested in) and a bonus temperature sensor built in. It uses the I2C protocol for communication which I found pleasant to work with although it would probably be simpler to just use am analog voltage sensor.
Here's the program I wrote to read the sensor over I2C: https://gist.github.com/tsyd/f48e933a21fb40b9f9eea28118f54e0...
Comment · 9 years ago
Although not strictly a Raspberry Pi project, I have a couple C.H.I.P. boards[1] scattered throughout my apartment collecting temperature and humidity readings (using a HIH8120 sensor[2]) and feeding it to my Raspberry Pi which runs InfluxDB and Chronograf[3] to store and display a simple dashboard. The end result looks like this: http://i.imgur.com/cIrhSUq.png
[1]: https://getchip.com/
[2]: https://sensing.honeywell.com/HIH8120-021-001S-humidity-sens...
[3]: https://www.influxdata.com/time-series-platform/chronograf/
Comment · 9 years ago
Any EBAY (https://www.google.com/finance?q=NASDAQ%3AEBAY) went up 254%? No, these are just glitches with Google Finance. It happens once in a while.
Comment · 9 years ago
I use a paid generator: https://termsfeed.com/. It asks you a few questions about how you will be using the data and generates the text based on your answers.
Comment · 10 years ago
I like how the people behind the podcasts, the hosts and frequent guests are catalogued. It's an interesting way to browse for episodes and podcasts that I haven't seen done anywhere else.
Shameless plug: I've been working on a similar project (https://podcast.party/) that also lets you subscribe to podcasts to keep track of which episodes you have played/unplayed.
Comment · 11 years ago
PodcastParty – https://podcast.party/
It's a cloud-based podcast aggregator with a focus on discovery and social aspects (e.g. seeing what your friends are listening to, commenting on podcast episodes, sharing clips, etc.).
Comment · 12 years ago
Remember: it's the price-to-earnings ratio and not price-to-revenue ratio.
Amazon's stock trades at a P/E of 910 exactly because it's deferring profit to continue growing its revenue. At some point it's going to stop investing its revenue into growth and start realizing a profit on that revenue. At that point the P/E will come down.
Comment · 12 years ago
I've been happy with XE Trade (http://www.xe.com/xetrade/) for USD/CAD transactions.
I knew this was a possibility when buying from Amazon Warehouse but didn't expect it when buying new directly from Amazon.