[Dprglist] Robotics in Costa Rica

[Eric Yundt]

Doug,

Thank you!  That's an excellent idea I hadn't considered.   I did find the
NewPing
library from an Arduino forum post and have it loaded and ready to play as
soon
as I've got the Arduino in my hot sweaty palms...  ;-)

Woohoo!  Now we'll be able to do super-smooth line following with 6 LEDs.
jajaja.

BTW, that Basic Arduino Tutorial you have in DPRGclips was great!  Thank you
for that.  I had been through enough playing with Arduino IDE videos that
my eyes
were crossed and it was refreshing seeing one focused on almost exactly what
I want to do.

--
Eric

On Tue, Jul 31, 2018 at 9:08 AM, Doug Paradis <paradug at gmail.com> wrote:

> Eric,
>    You can save one pin on the HC-SR04 by connecting both Echo and Trigger
> together. If you use the Arduino newPing library for the sensor, the author
> of the library discusses how to do this. Also, as you say you could just
> set the motor controller standby pin high (5v).
>
> Regards and good luck on the Science Fair.
> Doug P.
>
>
>> If we can swing it all in time, we'd like to show the Robot with these
>> skills:
>>
>>     Line Following (QTR-8RC LED array)
>>     Find the Color (TCS3200 sensor)
>>     Avoid Obstacles / Find Door (HC-SR04 & Sharp IR sensor)
>>     Precision Driving (wheel encoders, odometry)
>>
>> After studying the Arduino pins a bit, our current plan is to hook up
>> thusly:
>>
>>     Arduino Uno powered directly from 7.4v LiPo via Power Jack
>>     Motors powered via 7.4v LiPo >> DFR0204 converter >> 6v
>>
>>     Arduino Uno pins:
>>
>>         A0 - Sharp IR Vo
>>         A1 - QTR LED 3
>>         A2 - QTR LED 4
>>         A3 - QTR LED 5
>>         A4 - QTR LED 6
>>         A5 - TB6612FNG STBY
>>         D0 - External Interrupt from Motor A Encoder DOUT
>>         D1 - External Interrupt from Motor B Encoder DOUT
>>         D2 - S3 Color Filter Select TCS3200
>>         D3 - S4 Color Filter Select TCS3200
>>         D4 - OUT Color Frequency TCS3200
>>         D5 - PWM for HS-422 Servo
>>         D6 - PWMA for Motor A via TB6612FNG H-bridge
>>         D7 - AIN1 Motor A Direction via TB6612FNG H-bridge
>>         D8 - AIN2 Motor A Direction via TB6612FNG H-bridge
>>         D9 - PWMB for Motor B via TB6612FNG H-bridge
>>         D10 - BIN1 Motor B Direction via TB6612FNG H-bridge
>>         D11 - BIN2 Motor B Direction via TB6612FNG H-bridge
>>         D12 - ECHO from HC-SR04
>>         D13 - TRIG from HC-SR04
>>
>> Of course that runs us out of pins and I've only got 4 of the 8 LEDs for
>> the
>> line sensor array hooked up. [ ... ]
>> I've been trying to figure out if I can double-up on a pin or two to free
>> some
>> up for either more LEDs from our line sensor or to read a useful button
>> state.
>>
>
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