How do I give a radio control car autonomous control

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  1. - 1st January 2010, 18:56 #1
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    Default Solderless breadboarding

    A quick judgment please.

    I just discovered solderless breadboarding. Does it work? Is it reliable? I think I can buy some at You Do It tomorrow. Is it a good idea?

    Ken
  2. - 1st January 2010, 19:03 #2
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    Thumbs up solderless bread-boarding

    Quote Originally Posted by Kenjones1935 View Post
    A quick judgment please.

    I just discovered solderless breadboarding. Does it work? Is it reliable? I think I can buy some at You Do It tomorrow. Is it a good idea?

    Ken
    YES! YES, for most prototypes Yes, they are a great way to test ideas.
    -Adam-
    Ohm it's not just a good idea... it's the LAW !
  3. - 1st January 2010, 20:26 #3
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    Default

    Took a quick look at the schematic and you will need a regulator from the 6 volt battery pack...

    As for the bread boards.
    Good, bad, and ugly....
    That is all I use for proto-typing. Then when I am happy with things I get the soldering iron out.
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    Dave
    Always wear safety glasses while programming.
  4. - 2nd January 2010, 02:22 #4
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    Default Analog to digital conversion PIC16F887

    Folks,

    OKAY: Details.

    My reading of the PICkit 2 Users Guide tells me that AN0 is connected to the on board potentiometer. AN1 is available for my use.

    I need to connect the light sensitive resistor to an analog to digital converting input. Please confirm that I am getting this correct.

    Pin 20 is A to D input AN1 and available.
    It has an input resistance of at least 1Kohm
    I can choose my reference voltage to be either Vdd or Vss.
    I would install a 1Kohm resistor from Pin 20 to Vdd.
    If I were to choose a CDS cell that varies from 1Kohm in darkness to 24Kohm in bright light do you think the A to D on pin 20 could discern the difference?

    Yes, a voltage regulator on the six volts. Thank you.

    Ken
  5. - 2nd January 2010, 02:56 #5
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    Default Current consumption PIC16F887??

    A 5 volt regulator has been suggested. I need to know the power requirement.

    I have looked but not found the Microchip spec of the current consumption for the PICkit 2 or for the 16F887 chip itself.

    Do you guys know where to look or know the value off hand?

    Ken
  6. - 3rd January 2010, 03:35 #6
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    Default Picbasic.co.uk disappeared for a couple days

    Anybody know what happened?
  7. - 3rd January 2010, 07:47 #7
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    Default

    Quote Originally Posted by Kenjones1935 View Post
    A 5 volt regulator has been suggested. I need to know the power requirement.

    I have looked but not found the Microchip spec of the current consumption for the PICkit 2 or for the 16F887 chip itself.

    Do you guys know where to look or know the value off hand?

    Ken
    I am not sure if there is any one answer. It would depend on the work being done by the chip. ~~How many things and at what current is the PIC driving? LEDs for example.

    But saying that..... 1 amp should do for the regulator specs.
    Dave
    Always wear safety glasses while programming.
  8. - 4th January 2010, 00:29 #8
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    Default How does the Electronic Speed Control know??

    The undisturbed connection between my Fatuba receiver and my ESC box has three wires, black, red, and blue. The black is GND (reference), the red is Vcc (hopefully a regulated 5volts), the third is the signal from the receiver to the ESC telling it which direction and how fast to spin the wheels (what voltage and which polarity to feed the DC motor.)

    This is pulse width modulation. How is this information encoded?

    My guess is that a square wave (50% Vcc 50% reference) tells the ESC to not power the motor at all. A larger than square wave pulse stream says to feed the motor positive voltage proportional to the area under the pulses. A smaller than square wave pulse indicates to reverse the voltage polarity and feed power inversely proportional to the area under the pulses.

    Am I close enough for government work?

    Ken
  9. - 4th January 2010, 02:47 #9
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    I bought a Radio Shack 2 1/8 inch IC breadboard socket kit. It looks just like one in your picture.

    I am confused on how to use it. I have some dtdp switches that are dual twelve pin packages. They snap into the breadboard just fine, but not over the channel. Hence (if I understand which pins are connected to which correctly) the opposite pins are shorted to each other.

    I have a dual inline socket into which the dpdt switch fits fine. It fits bridging the channel of the breadboard. That is what I expected. However, the pins do not snap into place. They are not allowed to become fixed. Could they be too big? I thought everything was standardized.

    Our Radio Shack stores are down in inventory and the sales folks know nothing about these pieces.

    Ken
  10. - 4th January 2010, 04:28 #10
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    Default

    I do not know anything about the Fatuba, maybe Alan knows...

    Unfortunately not everything is standard, most are and the one that are not can be adapted in some way. Might have to make an adapter.

    In my picture there are a couple surface mounts, a SD card socket, a 68 pin PLCC, and a part that has the pins at 1 mm.

    So I guess I do get the soldering iron out before the project is completely proto-typed.
    Dave
    Always wear safety glasses while programming.
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