# Tiny Robot Plat Form With Pi Zero_part1

418

7

i am figuring about the part 4 roller bot out that arduino running in multi-program

crashing out ! (Tiny Robot Plat Form With nano_part_4 + reset circuit)

IN CODING(nano_part_4):

so i have to write a sub-program in order to reset it's self every second.

or it will not both receiving next remoter signals and running at the same time!

and finally, i use pi zero instead then.

and then , i slim it by took apart the IR receiver circuit and

took apart nano and the reset circuit, and remote it with

a wireless keyboard in order to speedup the response time.

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## Step 1: Materials

pi zero * 1

dc-motor gears * 1

micro servo motor * 1

USB wireless keyboard*1 (as the remoter)

5v relay * 2

AAA batt * 4

AAA holder * 2

3.7 v Li battery(18650) * 1

3.7 v Li battery(18650)holder * 1

TR 1, 2 : 2N 3904 * 2

D 1, 2 : IN 4148 * 2

C 1 : 100 uF * 1

C 2 : 0.01 uF * 1 (for bypass noise)

R1 : 10 K OHM * 1

R 4,5 : 1 K OHM * 2

PCB * 1

screw * 9

BBQ stick * 1

## Step 3: Coding

# import curses, GPIO and time

import curses

import RPi.GPIO as GPIO

import time

#set GPIO numbering mode and define output pins

GPIO.setmode(GPIO.BOARD)

GPIO.setup(7,GPIO.OUT)

GPIO.setup(11,GPIO.OUT)

GPIO.setup(12,GPIO.OUT)

GPIO.setup(13,GPIO.OUT)

GPIO.setup(15,GPIO.OUT)

p = GPIO.PWM(12, 100) # channel=12 frequency=100Hz

p.start(0)

# Get the curses window, turn off echoing of keyboard to screen, turn on

# instant (no waiting) key response, and use special values for cursor keys

screen = curses.initscr()

curses.noecho()

curses.cbreak()

try:

while True:

char = screen.getch()

if char == ord('q'):

break

elif char == curses.KEY_UP:

GPIO.output(7,False)

GPIO.output(11,True)

GPIO.output(13,False)

GPIO.output(15,True)

elif char == curses.KEY_DOWN:

GPIO.output(7,True)

GPIO.output(11,False)

GPIO.output(13,True)

GPIO.output(15,False)

elif char == curses.KEY_RIGHT:

p.ChangeDutyCycle(22)

time.sleep(0.5)

GPIO.output(11,True)

GPIO.output(7,False)

GPIO.output(13,False)

GPIO.output(15,True)

elif char == curses.KEY_LEFT:

p.ChangeDutyCycle(8)

time.sleep(0.5)

GPIO.output(7,False)

GPIO.output(11,True)

GPIO.output(13,True)

GPIO.output(15,False)

elif char == 10:

GPIO.output(7,False)

GPIO.output(11,False)

GPIO.output(13,False)

GPIO.output(15,False)

p.ChangeDutyCycle(13)

time.sleep(.5)

#p.stop()

finally:

#Close down curses properly, inc turn echo back on!

p.stop()

curses.endwin()

GPIO.cleanup()

## Step 4: Wiring Up

Connect pi_zero to the PCB,

and then connect battery and motor together.

*** you need to save the code last step to EX: remote.py

and you append the .bashrc

"sudo python remote.py" in the last line

in order to boot up and run ! ***

## Step 5: Test Run

Participated in the
Robotics Contest 2017

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