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Kategorie: Diplomové, bakalářské práce |
Tento dokument chci!
Práce popisuje principy a problémy při realizaci ultrazvukového anemometru. Je popsán princip výpočtu rychlosti větru a následné korekce výpočtu. Pro realizaci jsou využity ultrazvukové sensory a microcontrolér ARM Cortex-M3. Práce se zabývá generováním PWM signálu, jeho analogovou filtrací, zesílením a odvysíláním. Na přijímací straně jeto nízkonapěťový zesilovač a komparátor. Vyvíjený kód je popsán pomocí vývojového diagramu.
can set various design rules minimum pads
width, minimum route width minimum clear space between routes and this tool then
correct final design according ours demands. [4]
All used electronics components are axial, placed top and soldered bottom of
PCB. Mirror inverted layout was printed tracing paper put board and
illuminated. first circuits were completed solder-
less breadboard and then evaluation board module was created. This multi platform OS
software easy use, ideal for manual routing. each board larger side are two lines brought out pins with 2,54 mm. Module board can be
connected above board via connectors. Final board was
cleaned alcohol and drilled. Its width 62
mm and length 116 mm. Then illuminated film was developed sodium hydroxide solution.
For this type component optimal makes routes wider. It’s cheap way how create PCB
in laboratory with commonly available chemical substances and positive photo-resist
fiberglass board.
Illustration 4. Program show unconnected pads and
pins and include design rule check.
We tin-plated the board first and then planted used components. But from length can’t occupy more than don’t
cover display. All integrated circuits are DIP case.IMPLEMENTATION
4.
PCB design was created with Eagle software CadSoft.1: Made module board photos
19
. All have 0,4 with same
space between them. After
that etched board hydrochloric acid with hydrogen peroxide.1 Printed circuit board
We realized another various analog circuits. Made board
with it's mother board and from bottom layer images below.
PCB was created positive photo-way process.
Between them free space with width mm.
Dimensions our module was given dimensions board
