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Epoxidove podlahy
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BETON
- betón v pomere 4 až 3 lopaty kameniva na 1 lopatu cementu (Čim jemnejšie je kamenivo, tým viac cementu pridávame.)
- 40 kg vrece cementu = 33 litrov, 25 kg = 20,8 litrov.
- GARAZ:
- 0.09m * 1.4m * 4.1m => 0.5 m3, minimum 200kg cementu/m3 betonu => min 100 kg na garaz
- Miešanie betónu
Pri miešaní betónu dávame do miešačky vždy najskôr vodu, následne 3 – 4 lopaty kameniva a po premiešaní pridávame postupne celú vypočítanú dávku cementu. Po rozmiešaní cementu postupne pridávame štrk, až kým betón nemá požadovanú konzistenciu. Miešame približne 3 – 5 minút. Dobrý betón by sa mal v spádovej miešačke prevaľovať, mal by pri vysypaní vytvoriť kužeľ a nemal by po uložení odlučovať vodu. Riedke betóny, ktoré odlučujú po uložení vodu, sú po vytvrdnutí prašné, tvoria sa v nich trhliny a drobia sa.
- Aj v domácich podmienkach by mala byť pri výrobe betónu použitá aspoň plastifikačná prísada, ktorá umožňuje jeho dobrú spracovateľnosť pri nižšej dávke vody.
Concurency
- Monitor ... a monitor is a synchronization construct that allows threads to have both mutual exclusion and the ability to wait (block) for a certain condition to become true. Monitors also have a mechanism for signaling other threads that their condition has been met. A monitor consists of a mutex (lock) object and condition variables. A condition variable is basically a container of threads that are waiting for a certain condition. Monitors provide a mechanism for threads to temporarily give up exclusive access in order to wait for some condition to be met, before regaining exclusive access and resuming their task.
Another definition of monitor is a thread-safe class, object, or module that wraps around a mutex in order to safely allow access to a method or variable by more than one thread.
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Zaujimave Linky - Elektronika
http://robotstore.cz/
http://www.santy.cz
http://www.snailshop.cz
http://eshop.soh.cz
http://laser-shop.cz
http://www.hwkitchen.com
http://www.shop.uart.cz .. tu som kupoval
http://www.easyduino.cz
http://mcufriend.com
- LCD displaye - ale stranka je po korejsky alebo tak nieco
Multirotor - copters
http://hobbyking.com
- Eshop s obrovskym vyberom
www.ecalc.ch - Calculator
http://www.hooked-on-rc-airplanes.com
www.fpvforme.com - FPV for me
http://elektromodely.com/ - zaujivave linky
- Magnetometer HMC5843 breakout - 3axis 50 EUR
- Barometer BMP085 breakout - 25 cm 19 EUR
- IMU, 5 DOF, 3-axis accelerometer, 2-axis gyroscope 50 EUR
- All in one - ITG3200+ADXL345+HMC5843+LPC2148+XBEE+uSD 130 EUR
- Pololu - motor s prevodovkou
- RC-SOCCERBOT, motor s prevodom, 12V 240rpm, 4mm hriadel
- Analogue Joystick, 2xpotentiometer 10k, 1xbutton, 3x3cm
- BlinkM - I2C controlled RGB LED
- cold light string RGB, 1,5m, for night flying
- EggBot, robot na kraslice a pod (ping-pingove az pomaracne)
- DS1077 Programmable Oscillator Breakout - 16.2kHz to 133MHz 6 eur
- TI L293DNE H-bridge for switching two motors, 1A
- STM32 Primer2, ARM Cortex-M3,72MHz,touch.LCD,IrDA,SD,USB,3-axis. accelerometer
- Arduino Hardware
- Netduino - Netduino Mini, 32-bit ARM 48MHz, .NET Micro Framework
- 11 eur Rayson BTM-112 bluetooth class 2 (22m) SPP module 23.3 x 14.5 mm
- 54 eur EvB4.3 v4 with ATMega644P, 16x2LCD, 4x7-segm, 8xLED, 5xbtn, DS18B20, USB, SD, RT
http://modelhobby.sk
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