(r1) DevicesNeeded < AFNOG

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---+ Devices needed
---++ The Raspberry Pi

The Raspberry Pi features
   * !SoC: Broadcom BCM2837
   * COU: Quad Core ARM Cortex-A53, 1.2 GHz
   * RAM: 1GB LPDDR2 (900 MHz)
   * Networking: 10/100 Ethernet, 2.4 GHz 802.11n !WiFi
   * Storage: micro SD
   * Ports: HDMI, 4*USB2.0, Ethernet, Camera, Serial Interface, Display Interface
Here is a photo of the processor card:

<img alt="raspberry.png" height="351" src="%ATTACHURL%/raspberry.png" title="raspberry.png" width="494" />

It is better to use a plastic case for protection:

<img alt="case.png" height="181" src="%ATTACHURL%/case.png" title="case.png" width="254" />

In addition to the processor board itself we need a 5V, 2.5 A power supply with micro USB connector

<img alt="powerSupply.png" height="157" src="%ATTACHURL%/powerSupply.png" title="powerSupply.png" width="184" />

and a micro SD card for storage. This card will hold the operating system and all the user and system files.

<img alt="sd.png" height="91" src="%ATTACHURL%/sd.png" title="sd.png" width="110" />

In order to access external devices like our sensors a series of interfaces are available:
   * general purpose I/O pins (GPIO)
   * standard tx,rx serial interface
   * !I2C instrumentation bus
   * SPI interface
These interface pins are available on a 40 pin flat cable connector and are made available to the experimenter on a bread board through the _cobbler_.

<img alt="cobbler.png" height="210" src="%ATTACHURL%/cobbler.png" title="cobbler.png" width="260" />

Now all we need are the sensors themselves and some connecting cables:

<table border="1" cellpadding="0" cellspacing="1" rules="none"> <tbody> <tr> <td>

<img alt="hc-sr04.png" height="176" src="%ATTACHURL%/hc-sr04.png" title="hc-sr04.png" width="246" />

The ultra-sonic distance sensor
</td> <td>

<img alt="colorSensor.png" height="179" src="%ATTACHURL%/colorSensor.png" title="colorSensor.png" width="257" />

The colour sensor</td> </tr> </tbody> </table> <img alt="wires.png" height="315" src="%ATTACHURL%/wires.png" title="wires.png" width="265" />

bread board wires

-- %USERSIG{TWikiAdminUser - 2018-01-21}%

---++ Comments

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Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who
png	case.png	r1	manage	42.1 K	2018-01-21 - 16:21	TWikiAdminUser
png	cobbler.png	r1	manage	42.4 K	2018-01-21 - 16:21	TWikiAdminUser
png	colorSensor.png	r1	manage	50.0 K	2018-01-21 - 16:15	TWikiAdminUser
png	hc-sr04.png	r1	manage	50.9 K	2018-01-21 - 16:15	TWikiAdminUser
png	powerSupply.png	r1	manage	28.8 K	2018-01-21 - 16:21	TWikiAdminUser
png	raspberry.png	r1	manage	229.6 K	2018-01-21 - 16:15	TWikiAdminUser
png	sd.png	r1	manage	10.3 K	2018-01-21 - 16:21	TWikiAdminUser
png	wires.png	r1	manage	109.3 K	2018-01-21 - 16:21	TWikiAdminUser

Topic revision: r1 - 2018-01-21 - TWikiAdminUser