(r8) WoodenBox < Cosmac

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 title="Wooden Box for the !RaspiElf"
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The ELF Membership Card, the RaspiElfDisplay, and the RaspiElfKeypad need a home. I found  a wooden box from [[https://www.efcocreative.com/general-craft/1432676-wooden-box-23-5-x-17-x-9-cm-u.html][efco]], 23.5 x 17 x 9 cm. There is enough room to stow away the hefty [[https://www.raspberrypi.org/products/raspberry-pi-universal-power-supply/][Raspberry Pi Universal Power Supply]] too.
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---+ Hardware

| %IMAGE{"%PUBURLPATH%/Cosmac/WoodenBox/wooden-box.jpg" type="thumb" caption="Closed wooden box"}% \
| %IMAGE{"%PUBURLPATH%/Cosmac/WoodenBox/box-psu.jpg" type="thumb" caption="Box with Raspberry Pi and Universal Power Supply"}% \
| %IMAGE{"%PUBURLPATH%/Cosmac/WoodenBox/box-running.jpg" type="thumb" caption="RaspiElf running"}% \
| %IMAGE{"%PUBURLPATH%/Cosmac/WoodenBox/box-tft.jpg" type="thumb" caption="RaspiElf w/ TFT"}% |

Of course you do not need any monitor but it is very convenient to have one built in (e.g. HDMI Monitor 5" 800x480 from [[https://learn.adafruit.com/adafruit-5-800x480-tft-hdmi-monitor-touchscreen-backpack][Adafruit]]). Especially if you want to use emulators like the YAZE-AG (Z80, CP/M Plus), the DOSbox, or a terminal emulator for the [[RaspiElf#Start_BASIC3_without_EPROM][BASIC3]]. A USB keyboard can simply plugged in, I use Bluetooth keyboard because the Raspi has Bluetooth on board.

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---+ Buttons for Shutdown and Run

<blockquote cite="https://www.raspberrypi.org/magpi/off-switch-raspberry-pi/">
To keep prices down, the Raspberry Pi is missing something that most electronic devices come with: a switch to turn it on and off. That’s OK, you say, we’ll just pull the plug to turn it off. Unfortunately, this can lead to corruption problems with the SD card. All the instructions say you should run the shutdown command before pulling the plug, but this is not always possible, particularly when your Raspberry Pi is running headless without a connected keyboard and monitor, and possibly even without a network connection. So, what can a self-respecting DIYer do? The answer, of course, is ‘add your own switch’!
</blockquote>

To switch off the Raspberry Pi from the console:
<pre>
pi@cosmac:~ $ <b>sudo poweroff</b>
</pre>

I would like to use only one button for turn off and on again the Raspi as described in [[https://howchoo.com/g/mwnlytk3zmm/how-to-add-a-power-button-to-your-raspberry-pi][How to add a power button to your Raspberry Pi]] but for this we need the GPIO3 and this pin is already used by the I2C communication. I instead chose GPIO21 (pin 40) for shutdown, this can be configured with [[https://github.com/raspberrypi/firmware/tree/master/boot/overlays][overlays]]

Add following line to the file =/boot/config.txt= 
<pre>
dtoverlay=gpio-shutdown,gpio_pin=21
</pre>

If the Raspberry Pi is in HALT mode then you can start it again with switch off (pull the plug) and switch on again or hit the RUN button.
 
---++ P6 Pinout
| *Pin Number* 	| *Pin Name Rev2* 	| *Hardware Notes* |
| P6-01 	| RUN 	                | Short to ground to reset the BCM2835 |
| P6-02 	| GND                   |                                      |

| %IMAGE{"%PUBURLPATH%/Cosmac/WoodenBox/run-shutdown-bottom.jpg" type="thumb" caption="Wiring the RUN and the SHUTDOWN switches"}% \
| %IMAGE{"%PUBURLPATH%/Cosmac/WoodenBox/run-shutdown-switches.jpg" type="thumb" caption="There is pullup resistor (10 k to 3.3V, pin 17) for SHUTDOWN switch"}% |




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-- %USERSIG{PeterSchmid - 2018-06-24}%

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who
jpg	box-psu.jpg	r1	manage	3534.0 K	2018-06-24 - 14:36	PeterSchmid
jpg	box-running.jpg	r1	manage	3432.0 K	2018-06-24 - 14:36	PeterSchmid
jpg	box-small.jpg	r1	manage	56.3 K	2018-06-24 - 14:44	PeterSchmid
jpg	box-tft.jpg	r1	manage	311.7 K	2018-08-26 - 21:33	PeterSchmid
jpg	run-shutdown-bottom.jpg	r1	manage	225.7 K	2018-08-26 - 15:35	PeterSchmid
jpg	run-shutdown-switches.jpg	r1	manage	121.6 K	2018-08-26 - 15:35	PeterSchmid
jpg	wooden-box.jpg	r1	manage	462.1 K	2018-06-24 - 14:36	PeterSchmid

Topic revision: r8 - 2018-08-31 - PeterSchmid