Kaar3l's blog

PRINCIPLE: Basically this device is used to switch on fan, when conditions are good for drying wheat. Conditions are good when the humidity is lower than RH<70% and T<24 º C. When these conditions are met, the fan has to switch on. The fan is big and needs to be switched on rarely and switching on the fan frequently may kill the fan starting schematic. Therefore it doesn't need to change the relay state frequently. HARDWARE: I am using for this Arduino Mini Pro 3,3V, Nokia 5110 LCD, relay, LEDs, AM2305, BC547 transistors and voltage adjuster. The brain of the whole thing is Arduino, directly is connected to it 5110 LCD, relays are being run through the BC547 transistors. AM2305 sensor is connected to Arduino pin. SOFTWARE: For controlling the LCD is used LCD5110_Basic library. The LCD displays info from sensor: temperature, humidity, temperature limit, humitity limit, relay state and countdown timer. The code checks sensor every 30 seconds and updates display accord

SISSEJUHTATUS:      Umbes 2015 novembris kuulsin esimest korda sellest, et on võimalik raha teenida rentides enda arvuti kõvaketta mahtu. Tundub huvitav ja hea pakkumine, kui saan enda arvuti tööle jätta ja raha niimoodi teenida. Kuna oli kuulda tuttavatelt, et mõned on sellega tegelema hakanud, siis otsustasin enne uurida teemat ja seejärel võimalik, et ka liituda süsteemiga.    Peale mõningast google's surfamist leidsin väga vastakaid ülevaateid antud firma kohta. Ühed arvasid, et nüüd pole enam rahamuret ja teised, et tegu on püramiidskeemiga, mis on pettus. Kas ongi see pettus või saab raha teenida? Lehekülg tundub ju usaldusväärne, samuti, et on finantseeritud vormeli meeskonda. Lisaks pidi ka üks suur autotootja olema klient. Tundub hea pakkumine!? LIITUMINE: Uurisin edasi, mis on pakutavad variandid antud tootega liituda. Tuli välja, et on neli paketti: Kõigi pakettide puhul peab töötama arvuti päevas 10h.    Tundub kuidagi imelik, et 10h peab arvuti tööt

   I was searching a device that would have many GPIOs, USB and would have wifi connection. A device that was pretty good was WRTnode, that I was using before to open garage doors. I wanted to make an upgrade, because I had multiple PCB-s around and connections between the PCB-s were problematic sometimes.    Searching through internet I found that Mediatek has made LinkIt Smart 7688 device, that would be pretty good for me. It has loads of memory, flash storage and powerful cpu and it costs about 13$. So I bought three of those devices.   After about 2 weeks LinkIt devices arrived. Immidiately I plugged one to power and started testing. HARDWARE: The hardware is very nice for that kind on price, the board and connections seem well done. Really good is that the flash memory is visible and can be removed when needed. CPU and memory are covered with metallic covers. When running it gets comfortably warm, nothing hot. There is very small Chip Antenna on the device. My thought wa