Move images into repo. Make local references
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Readme.md
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# INTVAL 2.0
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##### Intervalometer for Bolex 16mm Cameras
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## [Project Home - git.sixteenmillimeter.com/16mm/intval2](https://git.sixteenmillimeter.com/16mm/intval2)
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@ -80,7 +80,7 @@ laser cutting and .STL files for 3D printing. The .INO file contains the source
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#### A. 3D Printing
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The most time-consuming part of this build *should* be 3D printing the parts for the INTVAL 2.0. Depending on the size of your printing bed it is most likely possible to print all parts in one convenient plate. As will be addressed later, the laser-cuttable elements can also be 3D printed if you lack access to a laser cutter.
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@ -90,7 +90,7 @@ The most delicate and integral piece to be fabricated on a 3D printer is the ``m
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#### B. Laser Cutting
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The INTVAL 2.0 has a flat panel on which all parts and electronics are mounted. For this reason, and to reduce production time, a laser cutting component has been added. See the much earlier--and now deprecated--attempt to have an entirely printable model in the original [INTVAL](https://github.com/sixteenmillimeter/INTVAL) (or [INTVAL Next](http://www.thingiverse.com/thing:151944) as I had taken to calling it on [Thingiverse](http://thingiverse.com)). Printing the flat base of this version took upwards of 3 hours on my modest printer, and with the accessibility of laser cutters at hacker/maker spaces becoming more common I decided this was feasible to include in my design.
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@ -136,43 +136,43 @@ Additionally you'll need wire and solder of your choosing.
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#### D. Assembly
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Assembling the INTVAL 2.0 can be done in an hour or so, much quicker if practiced. As mentioned, the largest amount of time should be in fabricating the parts or acquiring electronics/parts. There are 2 things I don't like about this design that I'll be addressing in subsequent builds: complexity of the electronics and crowding inside the case.
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##### **Mounting the electronics**
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The L298N is attached to the panel via the three M2 bolts. The space cut in the panel where the fourth would go is to prevent the Bolex's handle from rubbing against the panel. At this point I usually flash the Arduino Trinket Pro with the latest firmware, as in the ["Programming"](#Programming) section, prior to soldering and mounting. It can be done after, though, and can be reprogrammed after it is built.
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##### **Attaching the bearing**
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##### **Mounting the motor's base and microswitch**
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Modify the microswitch as shown in the photos. Be careful not to break the tab by over-exerting it at the bend. At this point, I usually solder leads onto the two tabs as shown below to save a cramped soldering job later. Insert the microswitch into the ``motor_mount_bottom`` and line the piece up with the 6 holes cut in the panel according to the pictures and rendering. It then gets attached to the panel with 4 of the M5 bolts and attached on the bottom with the corresponding M5 nuts.
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##### **Mounting the motor**
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The motor should fit snugly into the ``motor_mount`` piece and can be attached with 2 screws that usually accompany the motor (when bought from Amazon). At this point, I usually solder 2 leads onto the top of the motor and cap it so that the fragile tabs wont break off. I use red and black wires so that I can easily switch their position in the L298N if the intervalometer is functioning backwards.
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##### **Attach buttons**
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Three of the buttons are attached to the corresponding holes in the panel. The size of these holes might have to be modified depending on the type of momentary buttons you settle on. When cutting the panel cover, I will also add an etched-in label for each specifying (left to right) that they control ``direction``, ``speed``, and ``delay``.
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##### **Attaching the DC and 3.5mm sockets**
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Attach the 2.1mm DC socket and the 3.5mm audio socket to the bottom panel of the board, using the bolts to secure them.
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@ -191,7 +191,7 @@ Digital pin utilization is as follows:
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- **PIN 13** - LED indicator (built in to Trinket Pro)
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- **PIN 19** - Microswitch (aka A5)
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[](http://sixteenmillimeter.com/projects/imgs/intval2/intval2_schem.png)
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[](./img/intval2_schem.png)
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The Fritzing project requires the following libraries:
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