My Ultrasonic Cleaner that served me well for a couple of years, suddenly decided to quietly leave this world…
And so I reverse-engineered it’s schematic!
Roadmap
There were no posts lately. Sorry! I just had so much things to do, that I didn’t know what to start with. I, even, had no time to answer to all comments you’ve posted.
But don’t worry, I’ll start posting things right after the New Year.
And so, this is a small list of things to come:
- ATtiny2313 Based Thermostat last summary article with firmware, schematics and PCB files.
- Rigol DS1052E oscilloscope foot switch control (RUN/STOP button) via RS232.
- PWM Generator project.
- Easy wireless energy transfer.
- USB Joystick hack (uart conversion).
- Tips on how to make a front panel for your device.
- Water pump controller.
- And much more…
Now, this is just a preliminary list of the things I’m going to post here. They will probably appear in different order. But it should give you a general idea of what to expect.
Happy Holidays!
..we’ll meet again in 2012!
USB Audio Multiplexer
On my desktop PC I have a speakers and a headphones. Usually I use headphones, but when I need to switch to speakers I need to physically plug in speakers instead of headphones to my PC’s soundcard. I wanted to solve this problem for a long time, but never get around of that until recently I saw this posted on Hackaday.
And so I’ve decided to build my own really simple audio multiplexer.
ATtiny2313 – Based Thermostat Project Update #2
First fully working revision of firmware is finished, which takes all 2k of ATtiny2313′s memory. I wrote it in C, and I wanted to implement some other functionality, but unfortunately I’m out of space(of course if I would want to, I can put there ATtiny4313, which is identical to ATtiny2313, but has 4k of memory). Plus I’ve made a little explanation on temperature hysteresis and thermal capacitance, and ranted about front panel a bit.
UNI-T UT325 Thermometer Teardown
In the review of this thermometer I said that it was a weird Chinese product. And here’s why: despite of the poor firmware and software functionality it has pretty interesting and very “hackable” innards.
Let’s begin..
UNI-T UT325 Thermometer Review
Very often in electronics you would need to measure temperature, not just in one spot, but simultaneously in two or more spots. And log that measurements, so that you can plot temperature change over time.
Also, differential temperature measurements could be extremely useful in some cases, especially for thermal design of electronic projects.
So, the other day I bought this UNI-T UT325 dual-channel logging thermometer for a little under $80.
..review of another weird Chinese product below..
PWM Generator Project (part1)
Very often when designing some stuff I need a square wave signal generator with variable pulse width and frequency to control power MOSFETS.
You can use such a tool when designing DC-DC converter or switch-mode power supply, you can use it to emulate PWM from microcontroller when developing some new embedded design, or maybe you want to design your own wireless charger… This is only some of the things you can use it for.
So, I’ve decided to build very simple PWM generator.
Links To Electronic-Related Websites
Some time ago, after I started adding stuff to EEVBlog wiki page (http://eevblog.com/wiki), I thought why not to make a post about electronic-related websites that I like.
So, here’s my portion of links to electronic-related resources that I find interesting and useful:
Video-Based Blogs:
- EEVblog(www.eevblog.com) – Tutorials, equipment reviews, live shows, etc.
- Afrotechmods – Lots of really cool electronic tutorials for beginners.
- Jeri Ellsworth YouTube Channel – Homebrew transistors, pinball machines, and electronic tutorials.
- Jeri Ellsworth Second Channel
- Mike’s Electric Stuff – Extreme teardowns, random electronic stuff.
- Musings of a Scientist – Random electronic stuff
- Ben’s YouTube Channel – Mixed engineering stuff, not just electronics
- BTC Instrumentation – Lot’s of cool instrumentation tutorials, and instrumentation-related videos.
Text-Based Blogs:
- Tronixstuff – Arduino tutorials; reviews of electronic kits, test equipment and products; articles of interest and free monthly competitions.
- MightyOhm – Join the resistance! Electronics related stuff; personal blog.
- Dr Terrible’s House of Bloggable – Random electronic stuff.
- The Life of Kenneth – Random electronic stuff.
- Embeddederic – Rants from the Embedded Hardware Guy.
- Stephen’s Weblog – Random electronic stuff.
- Alternet – RF and other random stuff.
Electronic-Related News And Other Websites:
- EEWeb – Electrical Engineering Community – News, articles, and lot’s of other stuff.
- Adafruit Blog – Electronic-Related news, projects, etc.
- Hack A Day – hacks and projects.
- 4HV.org – Tesla coils and other high-voltage stuff.
Forums:
Datasheet Databases:
- DatasheetCatalog.com – Using it every day.
- AllDatasheets.com
Parametric Parts Search:
If you know some cool electronic-related websites, blogs, etc – I will be glad to hear about them! I’m always looking for a new information.
P.S. Tomorrow I’ll tell you about project that I started working on.
Break-Beam Sensor
About one month ago I had a request to write about break-beam sensors. So, here it is!
Well, basically break beam sensor consists of two parts: transmitter and receiver. Transmitter emits light (it could be, for example, an LED or a laser) and that light goes to receiver. If that light beam between transmitter and receiver is broken by some obstacle, and receiver detects no incoming light even for a brief moment – it triggers an alarm (or any load you want). For example you can count people that entering some room, or you can use it as an alarm system, yeah, just like in movies!
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