Difference between revisions of "User:DavidCary"
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+ | == scoreboard clock == | ||
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+ | I have been handed most of a classic basketball scoreboard. | ||
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+ | Each digit on scoreboard has 20 incandescent lamps: | ||
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+ | * * * * | ||
+ | * * | ||
+ | * * | ||
+ | * * * * | ||
+ | * * | ||
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+ | I hope to someday turn it into a clock and get it listed on the | ||
+ | [http://www.hackersbench.com/giants.html Unofficial Registry of Giant Digital Clocks"]. | ||
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+ | Should I divide up each digit into 7 segments, like most digital clocks, | ||
+ | or should I add more hardware so I can control each lamp individually? | ||
+ | --[[User:DavidCary|DavidCary]] ([[User talk:DavidCary|talk]]) 22:50, 10 October 2015 (PDT) | ||
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== Open Circuits wiki == | == Open Circuits wiki == |
Latest revision as of 22:50, 10 October 2015
Welcome to my little corner of Open Circuits.
I think I first stumbled across Open Circuits on 2006-03-01. I had been starting to set up a electronics-related wiki, but since this one was already here, why bother?
Feel free to leave a note on my talk page.
I created the WikiNode.
Contents
- 1 scoreboard clock
- 2 Open Circuits wiki
- 3 Electronic projects
- 4 wind turbine maximum power point tracker
- 5 thermal imaging
- 6 anti-spam
- 7 electronics workbench
- 8 data collection network
- 9 POV display
- 10 Full-color LED lighting
- 11 "PC Card" PCMCIA
- 12 Open Circuits Sysop
- 13 strange and bizarre serial protocols
- 14 from russ_hensel
- 15 from Alan: Hacker Wiki Radio
- 16 restore
scoreboard clock[edit]
I have been handed most of a classic basketball scoreboard.
Each digit on scoreboard has 20 incandescent lamps:
* * * * * * * * * * * * * * * * * * * *
I hope to someday turn it into a clock and get it listed on the
Unofficial Registry of Giant Digital Clocks".
Should I divide up each digit into 7 segments, like most digital clocks, or should I add more hardware so I can control each lamp individually? --DavidCary (talk) 22:50, 10 October 2015 (PDT)
Open Circuits wiki[edit]
In 2013, the OpenCircuits wiki went offline for a while, during the handover when I was trying to take over maintenance of the OpenCircuits wiki.
Oops.
There's still a few things not quite right -- after I thought I had completely restored the wiki, the "Open Circuits:Community Portal" doesn't exist at all, but I can see through the Wayback Machine [1] that there used to be a discussion there. I wish I knew what else needs to be restored.
Some ideas for possibly improving the OpenCircuits wiki:
- Install the "Math" extension so we get pretty TeX formulas (<math>\sqrt{20140218}</math>). Done!
- Install the SpamBlacklist extension. Done!
- Install something to make in-browser schematic editing or viewing or simulating or all three easier. In no particular order:
- Perhaps CircuitBee?
- Perhaps CircuitLab?
- Perhaps Falstad circuit simulator?
- Perhaps DoCircuits?
- Perhaps PartSim?
- Perhaps Upverter?
- Perhaps Dz863 DrawSCH?
- Perhaps 123D Circuits?
- Perhaps svg-edit?
Electronic projects[edit]
(Should I move these to dedicated pages such as electronics workbench, etc.?)
wind turbine maximum power point tracker[edit]
moved to maximum power point tracker
thermal imaging[edit]
David Cary did some work thermal imaging parts on a PCB a few years ago. I hear some people say you can see stars in the daytime with a (far-IR) thermal imager. I'm thinking about getting my own thermal imager. Perhaps something like:
cheap-thermocam: an arduino project[2] via "DIY Thermal Imaging System for under $200"[3]
anti-spam[edit]
see spam.
I prefer public communication so I avoid the problems associated with (the perception of) back room decisions.
--DavidCary 18:03, 4 February 2008 (PST)
electronics workbench[edit]
What exactly do I need for "normal" electronics development? I have a pile of stuff, and I have a wishlist of more stuff ... I hope to document which things are important to have, which things are useful but not immediately necessary, and which things ended up just gathering dust.
I wish there were a place like TechShop somewhere local.
- filing cabinet for all the miscellaneous bits of paper. If at all possible, I attach instruction manuals to the actual tool -- but if that is awkward, I stick the instruction manual in this filing cabinet.
data collection network[edit]
I'm building a "data collection network" that may end up with hundred of microcontroller sensor nodes, piping data into a PC. This may turn into a serious medical diagnosis tool.
POV display[edit]
(moved to POV display)
Full-color LED lighting[edit]
I'm planning to build a silly little toy with 3 LEDs -- one for red, green, and blue -- to show how "additive colors" work (a "color wheel"). (I might just extend it to have a whole spectrum of visible and infrared LEDs, and a prism to show the little spikes in the spectrum that LEDs generate).
"Red, Green, and Blue LED based white light generation" by Muthu, Schuurmans, and Pashley (2002) http://www.advancetransformer.com/uploads/resources/LED_White_Light_Issues&Control_-_White_paper.pdf
LED illumination applications http://en.wikipedia.org/wiki/Light-emitting_diode#Illumination_applications
"How Many Red, Green, and Blue LEDs to make White" by Don Klipstein 2001 http://members.misty.com/don/ledrgb2w.html
LED Color Shifting http://hackedgadgets.com/2006/02/14/wireless-led-color-shifting/
"PC Card" PCMCIA[edit]
I maintain the unofficial PC Card FAQ.
I'd like to move it to a wiki. What would be the best wiki to put it on? Open Circuits?
-- DavidCary
Open Circuits Sysop[edit]
Whee! I'm a sysop at Open Circuits! The power -- it's rushing to my head! --DavidCary 15:20, 23 February 2007 (PST)
Me too ( thanks to you? ). How can I use my power, release the hounds. I am open to suggestions as to how I can help, right now I am just going to read up on what a sysop can do. russ_hensel Feb '08
Hi David, will be nice to have antispam measures :).
--RafaelOrtiz 18:00, 28 October 2007 (PDT)
Hi David can you give me some block IP rights ?
--RafaelOrtiz 13:17, 18 November 2007 (PST)
Hi David, I noticed that a bunch of open circuits is just a placeholder. I'm effectively retired so I can probably help contribute to this Wiki by expanding a bunch of the sections, but the spam here is really way out of control. I look at the revision history and I see a good 10+ spam edits per day. Don't you think it's time to try requiring a logon to make edits? I thank that would really reduce the spam. Asking people to use a human controlled e-mail address is not that much. It's not like people need to give their real name and address or anything. I think you will find that more people will be willing to contribute if the spam problem is handled. Eliminating the spam is more of a problem at this point then getting people to contribute. It would also free up your time to focus more on real editing. Mzoran 19:38, 12 December 2007 (PST)
strange and bizarre serial protocols[edit]
It seems like many people can't resist building yet another custom proprietary communication protocol. I'm polishing up a list of the 22 most common serial communication problems. I'm also making a collection of various communication protocols. I'm most interested in protocols that are (a) simpler to implement and simpler to understand than TCP/IP, (b) don't use "too many" pins on a microcontroller, and (c) avoid most of the above 22 most common problems.
I am beginning to suspect that it may not be possible to avoid all 22 problems unless the protocol is at least as complex as TCP/IP.
Also, I think that 4 pins on the microcontroller seems to make the hardware and software the simplest -- it's possible to squeeze communication to fewer pins, but either the hardware or the software (or both) will be more complicated.
Some "simple" protocols:
- SPI
- UNI/O single I/O serial bus -- seems to contradict my earlier suspicion -- the hardware is simple (connect a I/O pin on the MCU directly to the I/O pin on the EEPROM), and the software doesn't seem very complex.
- ... more to come ...
from russ_hensel[edit]
I think some of it is forum vs wiki. I like the wiki format better, if I have a long answer I would rather post on open circuits and link to it. For a while I would send an email to people's site that I linked to to try to get more traffic and contributions here. I think some of it is ego, there is more ego in a forum. For now I just try to talk up open circuits as much as i can in my other posts. Open to more better ideas.
Russ
--
from Alan: Hacker Wiki Radio[edit]
Hi,
My name is Alan, I am a web developper and a music junky. I am working on music web project. We are building a network of local wiki radio, where everyone are DJ and contribute the music ambiance, the local information page and the general atmosphere.
I am writing to you because we are promoting indie artists and are looking for feedback, on features that would most suits them, from people with a hacker mindset.
Here is the url: http://muurje-project.appspot.com
Do not hesitate to write me an email. I am more than eager to give you details. Thank you for your time
Hoping to hear from you
Alan
restore[edit]
restored from archive.