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  1. HellasTechn

    Help with Arduino Serial communication.

    I forgot to mention that so far i have managed to receive all serial strings transmitted by the gps unit and echo them back to the PC using this example code: https://www.arduino.cc/en/Tutorial/SoftwareSerialExample #include <SoftwareSerial.h> SoftwareSerial mySerial(10, 11); // RX, TX void...
  2. HellasTechn

    Help with Arduino Serial communication.

    Dear friends. I am working on a project where an arduino uno and a GPS receiver are involved. The gps unit transmitts serial data NMEA. The data string on Hyperterminal looks like this : $GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47...
  3. HellasTechn

    Programming languages and MC selection.

    At this point i think i have made up my mind on which cource of action i want to take. Arduinos are excellent for beginners like me and ofcorce for advanced users and since i want to build my own boards i will just use the atmega 328-p-pu (i found it on ebay with the arduino uno bootloader). My...
  4. HellasTechn

    Programming languages and MC selection.

    Next thing that comes into my mind is: Arduino commands. isnt there something like an arduino commands manual ? EDIT: I think ifound it: https://playground.arduino.cc/uploads/Main/arduino_notebook_v1-1.pdf
  5. HellasTechn

    Programming languages and MC selection.

    I see your point but i still want to use the chip alone. Besides in simpleprojects like the led flasher after downloading the program on the MC, the rest of the board is not used (except the power supply section). What about shipping cost ? and then again i like eatching boards.
  6. HellasTechn

    Programming languages and MC selection.

    Because i want to be able to design my own PCB's. That is why i want to find out if/how i can have a board to download the codes on the chip and from there take the chip and put it on my hand made custom pcb. It may sound weird to you but i am used to making my own boards and i am not keen in...
  7. HellasTechn

    Programming languages and MC selection.

    Ok the site you linked me states that i only need a pc with a hardware serial port (which i actually have) and a transistor level shifter circuit. That should be easy since i have used the same circuit in the past to feed serial from my pc to the picaxe. it should be the same... P.S. Does...
  8. HellasTechn

    Programming languages and MC selection.

    I have found atmega 328p-pu that comes with the arduino r3 bootloader on it. https://www.ebay.com/itm/ATMEGA328P-PU-DIP-28-Microcontrolle-r-With-ARDUINO-UNO-R3-Bootloader-or-Not/401232444724?hash=item5d6b513d34:m:mDLpPK1-t0vsiOhYFC4DDpg:rk:2:pf:1 Now assuming it suits my projects needs my next...
  9. HellasTechn

    Programming languages and MC selection.

    So i will need a platform on which i will insert the chip to load my code. Right ? And then just remove the chip and put it on my custom board and start working with it.
  10. HellasTechn

    Programming languages and MC selection.

    Thank you all so much ! The arduino are an excellent choice i think. There is only the thing that i want to build my own boards and that is why i would like to use PIC mc's. I found lessons on youtube about C language (in my language) that are extremely helpfull. The lessons are not about C...
  11. HellasTechn

    Programming languages and MC selection.

    That is interesting. The truth is that i do not want goo deep into basic because i am interested in building custom automations. For example i once made a pet feeder with a Picaxe 14m2 and a simple code involving timer, high and low commands. there was no LCD or keyboard just a rotary switch...
  12. HellasTechn

    Programming languages and MC selection.

    Hello friends. I am new in the world of Microcontrollers. I want to learn a programming language and build a few projects i have in mind. I only know very little Picaxe BASIC language since i have used Picaxe chips 2-3 times. They are really nice and user friendly together with the software that...
  13. HellasTechn

    Measure distance to water surface

    UltraSonic is also very reliable.
  14. HellasTechn

    Help Needed: Vizio Power Supply Board

    Ahh i think it is not that simple. What device is it mounted on ? Is it on a TV set ? of so then you will not be able to replace it with a custom made PSU.
  15. HellasTechn

    polarity protection with diode between vcc and gnd

    if you use the fuse make sure you connect it like this :
  16. HellasTechn

    polarity protection with diode between vcc and gnd

    Dont use this topology because you risk shorting and burning your psu if inserted the wrong way. Better use a fuse in serries as suggested before or place the diode on one of the rails with correct direction. as for the above circuit i have also never used it.
  17. HellasTechn

    LED light receiver

    Are you sure there is a LED on the arm ? I beleave you can have far better acuraccy and distance with a laser diode and an ldr.
  18. HellasTechn

    555 timer

    I miscalculated...
  19. HellasTechn

    555 timer

    Yess well the Microcontroller is always the best option for such things...
  20. HellasTechn

    555 timer

    Yes it can. In monostable mode if you use a capacitor and resistor of large enough value the values that will give you 30 minutes high output should be about 100uf and 16Kohm. take a look here : http://www.ohmslawcalculator.com/555-monostable-calculator here is a link to a schematic that i...
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