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  9. 4tronix Ultimate Initio kit User manual

4tronix Ultimate Initio kit User manual

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Ultimate Initio kit for Raspberry Pi
You should already have followed the instructions for assembling the Initio chassis.
In this section we will add the Pirocon2 controller, the obstacle sensors, line sensors and the
pan/tilt assembly with ultrasonic sensor.
The (optional) iBoost64 is also used to boost incoming signal strength and resolve issues with
marginal IR sensors, including the wheel sensors on the Initio
Quickstart Pinout Description
If you use the recommended iBoost64 input signal booster, then we can connect the 8 I/O
signals as follows:
•
Pin 7 - Left Obstacle sensor
•
Pin 11 - Right Obstacle sensor
•
Pin12 - Left Line sensor
•
Pin 13 - Right Line sensor
•
Pin 15 - Left Wheel sensor 1 (Optional)
•
Pin 16 - Right Wheel sensor 1 (Optional)
•
Pin 18 - Tilt Servo (Output - not connected to iBoost64)
•
Pin 22 - Pan Servo (Output - not connected to iBoost64)
1. Fitting the Pirocon to the Raspberry Pi
Screw the support pillar to the underneath of the Pirocon. The position shown above is
suitable for a Raspberry Pi Model B+, Model A+ or Raspberry Pi 2 Model B
Use the hole in the centre if using a Model A or Model B
Push the Pirocon carefully onto the GPIO pins of the Raspberry Pi, ensuring the pins are
placed correctly as shown in the photo above
Connect the motor wires as shown. Red - Black - Black - Red
It won't damage it if you connect them differently, but the example programs won't go the
direction that you would expect
Plug the Black/White cable with the DC Jack into the left-most pins on the switch PCB on
Initio and the DC Jack end into the Pirocon as shown above.
Check all the wiring again very carefully, then now is a good time to see if the Pi powers up
and you can control the motors.
Use 6xAA batteries. These should be good quality rechargeable batteries. We recommend
Energizer Extremes or Eneloops
Connect a monitor, keyboard and mouse to the Raspberry Pi, plug in your SD card and switch
on. The green light near the On/Off switch should turn on, the LEDs on the Pi should start
flashing and the booting sequence should appear on the monitor. If not, switch off and double
check the wiring.
Instead of using the batteries, you can plug a micro-USB cable directly into the connector on
the Pi. This is an excellent way to get started and allows you to test everything (except the
motors, which may turn but only slowly) without using batteries.
2. Mounting Obstacle Sensors
Check that each sensor has 2 mounting collars. Screw one onto the body of the sensor,
leaving room at the front for the second one
Push the sensor through from the rear of the mounting bracket and screw on the second
collar. Feed the wires up through the holes in the top plate
Repeat for the second side
Connect to the Pirocon2 (or the iBoost64 as below)
•
Left sensor to Pin 7 (marked x07 or #04)
•
Right sensor to Pin 11 (marked x11 or #17)
The wire colours from the obstacle sensor are:
•
Red: 5V
•
Black: Gnd
•
White or Yellow: Signal
Make sure you connect them to the correct pins on the Pirocon or iBoost64
3. Mounting the Line Sensors
First, take the 30cm female-female jumper strip of 10 wires and split it into three strips:
•
Brown, Red, Orange, Yellow (this is for the Ultrasonic Sensor)
•
Green, Blue, Purple (this is for the Left Line Sensor)
•
Grey, White, Black (this is for the Right Line Sensor)
Next, prepare the two Line Sensors and 2 of the 3x8PB screws as shown
Screw the line sensors in position as shown, using the screwhole in the middle of the circuit
board
Connect the Green, Blue, Purple wire to the Left Sensor and the Grey, White, Black cable to
the Right Sensor
** Note some sensors have the pins in order 5V, Signal, Gnd; other have them in order
Signal, 5V, Gnd - make sure you know which wire colour is connected to which.
Connect the sensors to the Pirocon or iBoost64 (shown below)
•
Left sensor to Pin 12 (marked x12 or #18)
•
Right sensor to Pin 13 (marked x13 or #27)
4. Connecting the Pan/Tilt Assembly
This is now supplied fully assembled with the Initio Ultimate kit. If you have an unassembled
one, then please visit the assembly instructions here (opens in new window)
Take 4 of the 2.0x6PB screws (these are the smallest ones in the packet and there are 6 of
them)
Screw the base of the pan/tilt assembly to the upper plate in the position shown
Rotate the pan/tilt carefully left and right to access the screw holes
Connect the Pan servo (bottom servo) to Pin 22 (marked x22 or #25)
Connect the Tilt servo (upper servo) to Pin 18 (marked x18 or #24)
Note the colours of the servo wires and ensure they are connected correctly:
•
Black: Gnd
•
Red: 5V
•
Orange or White: Signal
5. Connecting the Ultrasonic Sensor
For this you will need the mounting plate, saddle clamp and the final 2 of the 2.0x6PB screws
used in step 4
Push the 4-way 30cm female-female cable that you made in Step 3 onto the top of the
ultrasonic sensor:
•
Brown: Gnd
•
Red: Echo
•
Orange: Trig or Ping
•
Yellow: 5V or VCC
Screw the saddle clamp over the cable terminals as shown above
Clip the whole assembly to the front of the Pan/Tilt assembly as shown above
Note that you can purchase additional clip-on mounts so you could mount a camera on one
and simply clip it off to change from Ultrasonic to Camera
Connect the other end of the cable into the ultrasonic pins located between the 2 motor
terminals
Ensure that Brown is Gnd, and they are in the order as shown