Editing Snap-O-Lantern Kit Assembly Instructions

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This page is part of the documentation for the [[Snap-O-Lantern]] kit.
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== INSTRUCTIONS: IN PROGRESS. ==
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''Instructions for building the [[Snap-O-Lantern]] kit are in progress below and will be completed on Tuesday, October 15. ''
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== What's included with the kit? ==
 
== What's included with the kit? ==
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http://shop.emscdn.com/wiki/snapolantern/1.jpg
 
http://shop.emscdn.com/wiki/snapolantern/1.jpg
  
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See the [[Snap-O-Lantern_Bill_of_Materials|Snap-O-Lantern kit Bill of Materials]] for a complete list and quantities.
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* See the [[Snap-O-Lantern_Bill_of_Materials|Snap-O-Lantern kit Bill of Materials]] for a complete list and quantities.
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== Tools required for assembly ==
 
== Tools required for assembly ==
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== Assembly procedure ==
 
== Assembly procedure ==
  
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We'll go one by one through the kit components.  This guide assumes that you have had some soldering experience.  If not, or if it has been a while, you may also want to look at pages 2 and 5-7 of the [[Bulbdial|Bulbdial clock]] assembly instructions, which go over basic tools and technique.  And, if you really are a beginner, there are plenty of good tutorials on line, like [http://www.instructables.com/id/How-to-solder/ this one].
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We'll go line by line through the kit components.  This guide assumes that you have had some soldering experience.  If not, or if it has been a while, you may also want to look at pages 2 and 5-7 of the [[Bulbdial|Bulbdial clock]] assembly instructions, which go over basic tools and technique.  And, if you really are a beginner, there are plenty of good tutorials on line, like [http://www.instructables.com/id/How-to-solder/ this one].
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== Wire up the eyes ==
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=== Wire up the eyes ===
  
 
http://shop.emscdn.com/wiki/snapolantern/2.jpg
 
http://shop.emscdn.com/wiki/snapolantern/2.jpg
  
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You have two pairs of wires, and two orange LEDs. Solder the long lead of the LED to the lighter wire, and the short lead to the darker one. Your wire pair colors may vary, but here, the yellow wire goes to the long lead and the blue one to the short lead. You can trim both the leads (as shown), or leave one long to stick into the top of the pumpkin.
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You have two pairs of wires, and two orange LEDs. Solder the long lead of the LED to the lighter wire, and the short leg to the darker one. Your wire pair colors may vary, but here, the yellow wire goes to the long lead and the blue one to the short lead. You can trim both the leads (as shown), or leave one long to stick into the top of the pumpkin.  
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== First component on the PCB: Socket ==
 
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http://shop.emscdn.com/wiki/snapolantern/2-5.jpg
 
  
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The IC socket goes in the big rectangle in the middle of the circuit board, marked "'tiny2313".  One end of that rectangle has a little "half-moon" notch (indentation) at one end.  The socket has a matching notch, as does the microcontroller.  Insert the socket into the circuit board, making sure that all 20 pins go through the holes, and matching the notched end of the socket to the drawing on the circuit board.  Solder all 20 pins of the socket in place.
 
  
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=== First component on the PCB: Socket ===
  
 
http://shop.emscdn.com/wiki/snapolantern/0.jpg
 
http://shop.emscdn.com/wiki/snapolantern/0.jpg
  
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Next, we'll follow along with the circuit diagram as we populate the ATtiny2313 board. The board provides some of the necessary connections, such as pin 20 to power and pin 10 to ground. It also provides prototyping areas for us to hook up the remaining parts to.
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Follow along with the circuit diagram, as we populate the ATtiny2313 board. The board provides some of the necessary connections, such as pin 20 to power and pin 10 to ground. It also provides prototyping areas for us to hook up the remaining parts to.
  
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First, install the socket, matching the half moon notch in the socket to the shape on the board. Solder the socket in place.
  
  
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== Hooking up the resistors and LEDs ==
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=== Hooking up the resistors and LEDs ===
  
 
http://shop.emscdn.com/wiki/snapolantern/3.jpg
 
http://shop.emscdn.com/wiki/snapolantern/3.jpg
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Connect the second LED similarly, with the light wire to the second prototyping row and the dark wire to the remaining accessible ground location.
 
Connect the second LED similarly, with the light wire to the second prototyping row and the dark wire to the remaining accessible ground location.
  
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== Servo port ==
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=== Servo port ===
  
 
http://shop.emscdn.com/wiki/snapolantern/4.jpg
 
http://shop.emscdn.com/wiki/snapolantern/4.jpg
  
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Using a zero-ohm jumper, connect the closest hole at pin 12 (labeled PB0/AIN0/PCINT0) to the second prototyping row directly below. Use the next zero-ohm jumper to connect the second hole away from pin 13 (labeled PB1/AIN1/PCINT1) to the top prototyping row below. (These will connect the two range options for the servo motor.)
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Using a zero-ohm jumper, connect the closest hole at pin 12 (labeled PB0/AIN0/PCINT0) to the second prototyping row directly below. Use the next zero-ohm jumper to connect the second hole way from pin 13 (labeled PB1/AIN1/PCINT1) to the top prototyping row below. These will form the two range options for the servo motor.  
  
 
The third zero-ohm jumper connects the left-most prototyping column to VCC_3 directly to the right. Connect the final jumper from the middle prototyping column to GND_3, also directly to the right.  
 
The third zero-ohm jumper connects the left-most prototyping column to VCC_3 directly to the right. Connect the final jumper from the middle prototyping column to GND_3, also directly to the right.  
  
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Finally, install the 6-pin DIL header with one pin in each of the top two prototyping rows and across the first two columns. The tall pins should go up so that you can fit the servo connector to them. The short ends go down through the board for soldering.
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Finally, install the 6-pin DIL header with one pin in each of the top two prototyping rows and across the first two columns.  
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== Battery box and microcontroller ==
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=== Battery box and microcontroller ===
  
 
http://shop.emscdn.com/wiki/snapolantern/5.jpg
 
http://shop.emscdn.com/wiki/snapolantern/5.jpg
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Connect the red wire from the battery box to VCC_IN+. Connect the black wire to GND_IN. You can use the holes that would have been for a jack to provide strain relief for the battery box wires.  
 
Connect the red wire from the battery box to VCC_IN+. Connect the black wire to GND_IN. You can use the holes that would have been for a jack to provide strain relief for the battery box wires.  
  
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The final step for assembly of the electronics is to insert the microcontroller into its socket. Note that it may be either an ATtiny2313 or ATtiny4313. Orientation is critical: Make sure that the half-moon indentation at one end of the chip matches that on the socket and PCB. Insert it firmly, as far down into the socket as it will go.
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The final step for assembly of the electronics is to insert the microcontroller into its socket. Orientation is critical: Make sure that the half-moon indentation at one end of the chip matches that on the socket and PCB. Insert it firmly, as far down into the socket as it will go.  
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== Servo motor setup and testing ==
 
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http://shop.emscdn.com/wiki/snapolantern/servo1.jpg
 
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Take the servo horn, and push it onto the servo motor shaft.  (Do not screw it in place; its position is not final yet.)
 
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Gently turn the motor by the servo horn until it reaches its stops, first one way, then the other way. The total range is about half of a turn. Locate the center position for your particular servo, which will be halfway between its two ends of travel. Once you know where center is, point the servo horn in that direction.  This orients the output shaft in the correct direction. Then, remove the servo horn, taking care to move the motor shaft as little as possible in the process.
 
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http://shop.emscdn.com/wiki/snapolantern/servo2.jpg
 
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Now that the servo shaft is centered, we need to place the servo horn at the correct angle.  Orient the servo horn as shown: the horn points slightly above and away from the cable. Press the servo horn onto the shaft.
 
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http://shop.emscdn.com/wiki/snapolantern/servo3.jpg
 
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Use the small screw from the servo bag to fix the servo horn in place.
 
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http://shop.emscdn.com/wiki/snapolantern/servo4.jpg
 
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The servo extender has a few holes for varying the length when attached to the horn. The two small screws (that were not included in the servo bag) will self tap into the pilot holes in the servo horn. However, if you use the hole in the very tip of the servo horn, it may split open, so it is better to use two of the other holes.
 
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http://shop.emscdn.com/wiki/snapolantern/servo6.jpg
 
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Use the two small screws to connect the servo horn extender to the servo horn.
 
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http://shop.emscdn.com/wiki/snapolantern/6-1.jpg
 
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Connect the servo motor to the lower row of the 6-pin header with the dark wire connected to ground on the right side of the board. Put batteries in the battery holder and turn it on. Allow it to go through the full range of motion. The lower position should be the smaller range.  
 
  
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http://shop.emscdn.com/wiki/snapolantern/6-2.jpg
 
  
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Move the servo motor to the upper row of the 6-pin header to try out the larger range: one or the other position may work better for the size of your mini-pumpkin.
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=== Servo motor setup and testing ===
  
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== Pumpkin Carving ==
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Connect the servo motor to one row of the 6-pin header with the dark wire connected to ground on the right side of the board.
  
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Mini-pumpkins are typically available at grocery stores and supermarkets near the larger pumpkins. They are often placed with the decorative gourds. You can usually buy them singly, but sometimes they're bagged in sets of four or five. You may also be able to find them at florist shops for use in fall centerpieces, but they'll likely be more costly than at a grocery store.
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'''''Servo horn attachment and testing instructions in progress'''''
  
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Please see the [http://www.evilmadscientist.com/2007/make-a-robotic-snap-o-lantern/ original Snap-O-Lantern article] for carving instructions.
 
  
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http://shop.emscdn.com/wiki/snapolantern/9.jpg
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=== Pumpkin Carving ===
  
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You can use the holes in the mounting tabs on the servo motor sides to mount part of a toothpick to help hold your servo motor into your pumpkin. Alternately, you can hold your servo motor down with toothpicks anchored entirely above it. If your servo motor sits too low or unevenly in your pumpkin, a scrap of cardboard makes a good leveling surface.
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Please see [http://www.evilmadscientist.com/2007/make-a-robotic-snap-o-lantern/ original project] for carving instructions.

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