Hi Vasile, Thanks for your feedback, I'll look into this in the next [days|weeks|...]. I'll fill an issue. And thanks for the cognac :)
Cheers, Seb 2010/3/13 vasile surducan <[email protected]> > > > On Fri, Mar 12, 2010 at 11:28 PM, vasile surducan <[email protected]>wrote: > >> >> >> On Fri, Mar 12, 2010 at 7:21 PM, mattschinkel >> <[email protected]>wrote: >> >>> We have now updated The Tutorial Book to version 0.3 >>> >>> This book is available as a PDF file, you can download it from jallib >>> project page: http://jallib.googlecode.com/files/Tutorial_Book_0.3.pdf >>> >>> >> I've read it quite fast. It will become a good tutorial book, however >> there are a few things which maybe you'll try to modify on next versions: >> >> 1. page 51, you refer to "plenty resources" and the link goes to google >> search page for "i2c". It suppose a reader of this tutorial knows to search >> on google using keywords, else he never find the tutorial itself... "this >> page" is a very good resource, however maybe deserve a full name, so the >> reader remember next time where is going. >> 2. the unnamed figure (btw, any image, formula or table should have a >> name, so you can refer at it in the tutorial text or talking about it on >> email) from page 52 has a low resolution, try to use at least 300dpi when >> export bitmap from eagle and convert it in grayscale, it's much better >> visible >> 3. on page 53 two pictures repeat (they aren't numbered as well), in one >> of them you point at some resistors without naming those resistors as R4 and >> R3 (I've told you this last time too), on every schematic or image, being a >> tutorial, the reader does not need to guess the component numbers or where >> is pin 1 of the IC. >> >> There are more issues, but If you'll try to add at least numbers to the >> figures and refer in text to the schematics and image numbers when >> explaining something, will start looking as a tutorial. >> >> >> Going further: > > 4. page 97 three irrelevant pictures on a whole page > 5. page 98 table on the top of the page (please add a table number) is > talking about V5 (which is known in literature as VS or contrast voltage) > and on the "remark" colums it says variable which is correct but > 6. on page 99 where is a schematic, the V5 becomes Vee (there is > inconsistancy in table, schematics and probably in the book text). VS could > be a -2.5...-5V output on many LCD, so you're telling to the beginner to > kill his toy... VS should be connect in the worst circumstances with a > resistor to ground. There are LCDs which need positive voltage around +2V on > VS for a good contrast. The universal solution is a potmeter of 10-20K > connected with wiper on the VS pin1 to +5V and pin3 to Vee (where Vee is a > negative voltage). If LCD does need negative voltage, pin3 is connected to > GND. See here a picture: > http://webspace.webring.com/people/dv/vsurducan/electro/PIC/f877.html > > On your schematic is missing the reset capacitor from RA5 to GND and the > 100nF near the PIC supply and another 100nF near the LCD supply. > 7. picture from page 100 should go on page 99 > 8. picture from page 101and 102 seems irelevant to me > > Even Seb will be angry with me, the purpose of a good book is not filling > it;s pages with huge pictures, when you're drinking a french cognac, you > need a small quantity, but with the best taste ever... > :) > > Vasile > > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<jallib%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > -- Sébastien Lelong http://www.sirloon.net http://sirbot.org -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
