Camera Modifications

1. Remove film reel and film frame plastic
2. Cut down plastic tabs to make room inside
3. Remove foam
4. Disassemble shutter housing
5. Remove shutter mechanism
6. Remove plastic lens, put other parts back, this gives enough room for pi camera to look through lens hole
7. Line up and drill holes to mount Pi camera
8. Remove film advance knob
9. Drill holes in top hollow area for wires for DC-DC converter

Camera Mounting

1. Screw Pi camera in place so it looks through shutter hole
2. Create a replacement shutter button using perfboard and a button
3. Feed camera ribbon cable and button wires through middle square hole

Power Supply Mounting

1. Solder wires for input and output power
2. Pull wires through holes made into top housing
3. Sit module inside of hollow area under top plate in the middle, where flash would be on the FN model
4. Use tension of wires to keep board in place

Raspberry Pi Modifications

1. Remove composite video jack
2. Remove audio jack
3. Remove 3.3V regulator
4. Connect 3.3V line to 5V line where regulator was

Raspberry Pi Modifications

1. Remove composite video jack
2. Remove audio jack
3. Remove 3.3V regulator
4. Connect 3.3V line to 5V line where regulator was

Raspberry Pi Modifications

1. Remove composite video jack
2. Remove audio jack
3. Remove 3.3V regulator
4. Connect 3.3V line to 5V line where regulator was

Software Steps

The following assumes you have installed Rasbpian and enabled the Raspberry Pi camera using raspi-config.

I also setup WiFi in/etc/wpa_supplicant/wpa_supplicant.confto connect to my local network and my phone's wifi sharing.

Bootup Changes

Switch to systemd to speed up boot, just doing this went from 25 to 14 seconds boot.

Fix serial console:

sudo systemctl start serial-getty@ttyAMA0.service
sudo ln -sf /lib/systemd/system/serial-getty@.service /etc/systemd/system/getty.target.wants//serial-getty@ttyAMA0.service

Disable unneeded services:

sudo update-rc.d lightdm disable
sudo update-rc.d triggerhappy disable

Disable sound modules by commenting out snd-bcm2835 in /etc/modules and by blacklisting others:

lsmod | grep ^snd | awk '{print "blacklist "$1}' | sudo sh -c 'cat > /etc/modprobe.d/snd-blacklist.conf` 

Disable IPV6 by uncommenting “blacklist ipv6” in/etc/modprobe.d/ipv6.conf

Install rpi_holga software

Install software prerequisites:

apt-get install python-picamera imagemagick python-pip python-numpy python-imaging python-flask libffi-dev libjpeg8-dev 

Install wiringPi and Python-WiringPi2 from Git source.

Install jpegtran-cffi:

pip install cffi jpegtran-cffi 

Clone software:

git clone git@github.com:omwah/rpi_holga.git /home/pi/rpi_holga 

Enable at boot up as soon as possible. Create /etc/systemd/system/holga-camera.service: 

[Unit]
Description=Holga Camera Application
DefaultDependencies=no
After=sysinit.target local-fs.target
Before=basic.target

[Service]
ExecStart=/usr/bin/python /home/pi/rpi_holga/camera.py

[Install]
WantedBy=basic.target

Enable at startup:

sudo systemctl enable holga-camera.service 

Webserver Setup

Installnginxto serve custom thumbnail software:

apt-get install nginx uwsgi uwsgi-plugin-python 

Enable the site using the config included in therpi_holgadistribution:

rm /etc/nginx/sites-enabled/default
ln -s /home/pi/rpi_holga/preview/server/nginx_site /etc/nginx/sites-enabled/preview
ln -s /home/pi/rpi_holga/preview/server/uwsgi.ini /etc/uwsgi/apps-enabled/preview.ini

Create a thumbnail directory for the software and make it writable by nginx:

mkdir /home/pi/pictures/thumbnail
chgrp www-data /home/pi/pictures/thumbnail
chmod g+w /home/pi/pictures/thumbnail

Restart nginx and the preview software should be available at your camera's IP address.