/
notes
194 lines (117 loc) · 2.55 KB
/
notes
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futuba 4 x 20 vfd:
needs ~2.7 A for the VFD
8 data: r/w
control:
wr : w data or command transfered on rising edge
a0 : w cmd mode = 1, data = 0
rd : w high when writing data
ss : w make high on data/commend send
test -> high
busy: r (active low)
bl : w low to blank
reset -> hish
use a pair of shift registers.
need busy out.
edge connector:
34 pins, 17 a side.
pads: 1/16th in, gaps: 1/32sd : 62.5 mils / 31.25
44 Pin Male Edge (.100 spacing).fp
work out edge connector pinouts.
non-cut side is gnd
pin 1 is on cut side.
top side of board will be gnd
side of edge connector without pin 1 is gnd
looking form top of board test pin is 5 from left hand edge, opposite pin 1
vfd debug:
00111101010110000
76543210warstblrn
01010000
http://www.delorie.com/pcb/docs/gs/gs.html#Your-First-Board
led strips:
https://www.adafruit.com/products/306
2 x 16 leds, can chain them
21 bpp (7 per channel), uses LPD8806
needs 2A per meter
http://www.ladyada.net/products/digitalrgbledstrip/index.html
https://github.com/adafruit/LPD8806
everything is 5V, needs 5A +
do we want ethernet? - yes.
need a way of attaching the ribbon cable, use the edge connectors?
http://gedasymbols.org/user/vanessa_dannenberg/footprints/44%20Pin%20Male%20Edge%20%28.100%20spacing%29.fp
http://gedasymbols.org/user/vanessa_dannenberg/footprints/24%20Pin%20Female%20Edge%20%28.156%20spacing%29%20EDAC.fp
mbed is 0.9 in between rows!
# we need:
#
# 14 ish vfd pins?
#
# spi for the led's?
#
# do we want a speaker or pizo? - uses pwm
#
# rgb led with pwm?
#
# http://mbed.org/users/DaveStyles/programs/popcorn/m51v01
rj45 is 6605759-1
1 3 5 7
2 4 6 8
1 RD+
2 RD-
3 3.3v
4 3.3v
5 TD+
6 TD-
7 nc
8 gnd
one is top left with socket facing away from you.
mbed mac: 00:02:F7:F0:3B:42
dimensions:
base:
124 - 14 = 110 x
824 - 14 = 810
vfd:
display area: 202 x 54.2 mm
say 205 x 60 mm
+ 44 l and r, so 293 w
h 100 + 12 + 12, so 124 w
vfd inner-outer h: 44
vfd inner-outer v: 32
vfd mounting:
105 - 16 = 89
89 high, 10 wide, 10-20 wide
black inside £450
all colour £800
lifo is
15 mins.
strips:
48cm ish between end led's
480 x 10mm
strip base:
530 x 110
55 is center
material is 3.2mm
53.40 is bottom side.
strip outer:
480 + (75-44) + 10 + 12: 533
0-30 30-60
length: 205
75 (vfd inner to led inner gap)
480
--
720mm
vfd edge:
30
10
12
12
824
width 100 + 12 + 12 = 124
height: need 100mm for display in box, so 100 + 2 x mat width
psu:
37mm high
97mm wide
195mm long
total :
internal:
100mm x 100mm x 720mm
roughly: 12cm x 72cm
atm cells are 53 bytes