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October 17, 2012
about 3 days ago
The 5V supply is very well regulated so you should be able to bypass any 5V regulators on your project with this supply. (For example, use the 5V pin on an arduino instead of the DC jack.)
The spec power efficiency of the 5V supply is 80%, much better than a linear regulator.
News - Enginursday: Battery Mana…
about 3 days ago
Nice. You remembered to put in the requisite coffee mug ring on your hand drawn schematic. Very classy. :-D
While we are being pedantic, it isn’t just MOSFETs that use the term “gate” for the controlling pin. AFAIK it’s both MOSFETs and JFETs (though I haven’t seen a JFET outside of class many solar orbits ago.) Also, don’t most thyristors use “gate”?
Hmmm… I don’t want to spend too much time here at work researching this, but do any of the other simple solid state devices other than the BJT use “base”?
It isn’t well known, but the symbol(s) for switches is(are) actually quite extensive with different bits meaning different things. Kind of like letters in languages that heavily use diacritics (unlike english).
If you take a critical look at the symbols on this page you should start to see variations of the basic symbol along with modifiers that specify things like what causes the switch to change state. If you really want to see all sorts of modifiers and how they can be applied, dig up a copy of IEEE Std 315 (also ANSI Y32.2) and look at Section 4. (I have a pdf of the 1975 version (reaffirmed in 1993), but I don’t remember where I found it other as a result of a google search. I don’t know the legality of it since I never paid for it, but as a hobbyist I really can’t justify the cost of the standards from any of the standards organizations.)
News - Adventures in Science: Ar…
about 5 days ago
Right, but in the context of that table it is the Arduino platform. I’m not sure if the Arduino pre-processing stuff defines it as int8_t or if it is the gpp compiler (the actual compiler used in the Arduino environment). Shawn has already weighed in though.
I’ll ferit away into my memory that char is truly implementation specific, especially when I eventually move to a different implementation. I keep going back and forth in my mind weather it is best to use the low level int##t and uint##t data types or the higher level byte, int, long. Especially since for me I want to write code that works on both an 8-bit AVR Arduino through to a 32-bit ARM M0 Arduino, and all the points in between, with very little changes needed. I feel I should use the higher level datatypes for portability, but I really want to conserve memory on my little UNO… Having lots of #ifdef clauses for different platforms starts making code look really ugly and hard to actually read and figure out what the intent is.
Or do I have it completely backwards and int##t and uint##t datatypes are actually higher level?
News - Adventures in Science: Ar…
about 6 days ago
I’m not sure if I spotted an error, or if I learned something wrong. I could have sworn that the ‘char’ datatype was signed. The table in the video shows it as unsigned. (Otherwise, what is the point of ‘unsigned char’ or ‘byte’, and what would be a signed 8-bit variable?)
News - Friday Product Post: Seei…
Look at SparkFun’s tutorial for this display, they provide a square of foam tape to mount the display to the board (or to what ever you want, just don’t stress the flex connections). You’ll want to set the jumpers properly first before covering them with the display. This is also covered in the tutorial.
If you are plugging this display on top of a Teensy, the pinout matches the Teensy and the tutorial has more details. If mounting it elsewhere, it looks like you could use the non-circled header holes to solder on solid bus wire that you can form loops out of to pass screws through as sort of bailing loops.
Also, remember this is a white on black display. There is no gray, so no antialiasing. Just a warning to limit expectations. But, because it is OLED, it doesn’t have viewing angle issues that LCDs have, and is self illuminating. It is very readable under indoor lighting. I haven’t taken any of mine outside in bright sunshine so I can’t make any testimonies about that though. The natural contrast looks like it should work outside in sunshine, but reflective glare might still wash it out. YMMV.
I love that little OLED display. Glad to see AdaFruit getting some competition for breakout boards for that display.
Remember, kids, you can use that OLED display with just about any µC platform that has support libraries for the SSD1306 driver. This includes regular Arduino hardware using either AdaFruit’s Monochrome OLED Breakout libraries or the u8g2 library.
News - Pi Day 2017
They’re different models.
Thanx. I had forgotten that development.
That “Model 2”, that’s what is commonly referred to as B+, right? Also, why is the vertical dimension missing from Models B and 2?
I chuckled to “weight in average tarantulas”.
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