Take a look at these two waveforms pulled from a UART line with a logic analyzer. Notice anything interesting?
It has been a crazy busy week for me and my brain is temporarily shut down so there will be no updates on the seismometer today. In the meantime, enjoy the some cat gifs and we’ll see you next week.
Analysis gone horribly wrong
We’re almost done with this stage of the project! (I think…). Admittedly, this part has taken me longer than I initially anticipated, mainly because I wanted to spend a bit of time trying to figure out what the heck was going on with the circuit (circuit analysis isn’t exactly one of my strong points…yet)
First, I have to admit that I messed up building the conditioning circuit. The first RC network after the first op-amp stage should have had a 6.8kΩ resistor. I accidentally used a 68kΩ resistor instead.
Because I haven’t done anything with the seismometer this week, there is no update today. Instead I will talk about things that make wavy stuff appear on something that looks like a tiny TV screen.
Yes, that’s the one!
For the next few posts, we will be going into the nitty gritty details of the conditioning circuit. I want to spend lots of time at this stage for two reasons:
- Analog circuits and analysis have never been my strong points and this is a great way to change that
- The last thing we want, is to work with erroneous data caused by poor design of the conditioning circuit
Today, we will be briefly looking at the circuit and focusing on its behaviour.
What you see above is the first breath of the seismometer – which is currently detecting my foot taps.
Img Credit: Wikipedia
Welcome to part one of the Seismic Sundays series! For the next 3 to 6 months, I’ll be attempting to make a seismology station that sends data to a web server for anyone to see. Today’s post won’t have anything technical on it. I will just be talking about what I plan on doing.
Oh, is it 2014 already?
Well then, happy new year everyone! It’s been a pretty eventful year here at meoWS and I’d like to summarize some of the big things that happened in 2013 as well as talk about what’s going to happen this year.
I recently accepted a job offer and am moving to a whole new town! Therefore, all my projects have some to a temporary halt while I relocate and settle down. I hope to be back at the end of the month or early November.