145 lines
3.4 KiB
Python
145 lines
3.4 KiB
Python
import math
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import components.audio_plug as audio_plug
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import components.usb_hub as usb_hub
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import components.keyboard as keyboard
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import components.screen_pillars as screen_pillars
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## Standard things (TODO move to separate file)
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# M3 threaded insert sizes
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ti_radius = 2.35
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ti_depth = 6.25
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# M3 hex nut dimensions
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m3_hn_diam = 5.5
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m3_hn_hole = 3
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m3_hn_thickness = 2.5
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# Dimensions for countersunk M4 screws
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m4_top = 9
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m4_bottom = 4
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## Keyboard dimensions
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keyboard.kbd_height = 95.5
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keyboard.kbd_width = 305
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keyboard.kbd_back_thickness = 19
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keyboard.kbd_front_thickness = 12
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# Pythagoras
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keyboard.kbd_actual_height = (
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keyboard.kbd_height**2
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- (keyboard.kbd_back_thickness - keyboard.kbd_front_thickness) ** 2
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) ** 0.5
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keyboard.kbd_angle = (
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math.acos(keyboard.kbd_actual_height / keyboard.kbd_height) * 180 / math.pi
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)
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keyboard.kbd_pillar_positions = [
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(19, 16),
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(142.5, 25.5),
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(keyboard.kbd_width - 20, 16),
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(23.5, 79.5),
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(145.5, 82.5),
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(keyboard.kbd_width - 19, 79.5),
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]
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keyboard.kbd_pillar_offset_1 = 5.5
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keyboard.kbd_pillar_radius_1 = 5
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keyboard.kbd_pillar_offset_2 = 2.5
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keyboard.kbd_pillar_radius_2 = 2.4
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keyboard.kbd_screw_radius = 1.1
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keyboard.init()
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## Screen dimensions
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# Whole screen size
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scr_w = 231
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scr_h = 65
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scr_thickness = 5.5
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# Visible screen size
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vis_w = 219
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vis_h = 55
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## Dimensions for the base of the computer
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# Thickness of the outer material
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shell_t = 3
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# Size of the base
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width = keyboard.kbd_width + 2 * shell_t
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height = 159
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base_thickness = 30 + shell_t # 30 inside
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# These are placed where convenient, and are used to join the top and bottom
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# parts of the case.
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# Measured from back-left corner OUTSIDE
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mounting_pillar_positions = [
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(6, 6),
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(6, 43),
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(120, 6),
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(170, 6),
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(width - 6, 6),
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(width - 6, 43),
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(120, 48),
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(170, 48),
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]
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# Offset for the USB port from back-left corner
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# of the case to left side of the hub
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usb_offset_x = width - audio_plug.item_w - usb_hub.item_w
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# CPU holder position from back-left corner of the case
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cpu_offset_x = 177
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cpu_offset_y = 2
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# Battery holder position from back-left corner of the case
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battery_offset_x = 15
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battery_offset_y = 3
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# HDMI out hole from back-left corner of the case
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hdmi_out_offset_x = 138
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## Dimensions for the Tandy lid
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# Size of the whole object
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tl_height = 66
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tl_height_bottom = 59
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tl_full_thickness = 48 # Will be shorter after construction
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# Screen angle
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tl_scr_angle = 20
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## Dimensions for the hinged lid
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# This is a constant used to control how far back the hinges go
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# when open. It's arbitrary and can be adjusted experimentally
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# printing small samples
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hl_hinge_slant = shell_t + 2
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hl_bezel_width = m3_hn_diam + 2
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hl_bezel_height = 1
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hl_bezel_thickness = 2
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hl_hinge_radius = 5.5
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hl_screw_radius = 1.5 # M3
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hl_ring_radius = 5 # M3
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hl_hinge_offset = max(p[1] for p in mounting_pillar_positions) + 6
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hl_hinge_width = 25
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# Base + this lid
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hl_full_thickness = 43
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## Dimensions for the simple lid
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sl_lip_thickness = 1.5
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sl_height = (
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max([y for _, y in mounting_pillar_positions]) + 6 + shell_t + sl_lip_thickness
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)
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sl_thickness = shell_t
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sl_front_lip = 8
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## Dimensions for pillars that connect base and lids
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screen_pillars.pillar_width = 12
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screen_pillars.pillar_height = 12
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screen_pillars.screw_head_radius = 3
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screen_pillars.screw_radius = 1.8
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screen_pillars.screw_head_depth = base_thickness - 13 # (screw thread length - threaded insert depth)
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