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Line
Designation
Value
Type
QTY
1
Circuit board
Meggy Jr RGB
1
2
R1, R2
1 k
Resistor, 1/4 W
2
3
R3
100 ohm
Resistor, 1/4 W
1
4
R4
10 k
Resistor, 1/6 W
1
5
RB0 - RB8
620 ohm
Resistor, 1/4 W
9
6
Q0-Q8
2STX2220
PNP Transistor
10
7
J2, J3
10-pin right-angle single-row header (break to 3,6)
10-pin right-angle single-row header (break to 3,6)
1
8
L1
Magnetic buzzer/speaker
1
9
U2,U3
STP16DP05B1R LED driver chips
2
10
U1
ATmega168-20PU Microcontroller
(pre-programmed in kits)
1
11
C7,C8
18 pF
Capacitor, ceramic
2
12
XTL
16 MHz
oscillator crystal
1
13
C3
1200 uF, 6.3 V
Cap., electrolytic
1
14
C1,C2,C4,C5,C6
0.1 uF
Capacitor, ceramic
5
15
D0-D7
3mm LEDs, yellow diffused
8
16
J1
6-pin DIL header
1
17
U4 (sockets)
10-pin SIP socket
4
18
U4
BL-M23B881RGB
8x8 RGB LED matrix
1
19
S1
Tactile Button Switch (reset)
1
20
b0 - b5
Tactile Button Switches, type B3F-4050 or similar
Tactile Button Switches, type B3F-4050 or similar
6
21
Battery Box
3 x AAA cell with wire leads and switch
1
22
J3 (jumper)
Header jumper fits onto J3 after soldering
Header jumper fits onto J3 after soldering
1
23
b0,b1
KeyCap, Round
2
24
b2,b3,b4,b5
KeyCap, Square
4
25
Rubber feet
1/16” thick by 1/4” diameter, hard urethane
4
26
Nylon Screw
3/4” x 4-40
4
27
Nylon acorn nut
4-40
4
28
Velcro Strip
~1”x2”, w/ extra strength adhesive
1
[Meggy Jr RGB]
[4]
For the sake of clarity, kit contents are
sorted into a few different bags of
parts.
Most of the parts are labeled by their
line item number that appears on the
from the bill of materials ( ).
(While it
can
create some interesting
mystery, we do not actually suggest
that you dump all the parts out into a
big pile. Just take them out of their
bags as needed.)
This table lists the kit contents, roughly in the order of assembly.
It is
not
(repeat:
not
) a set of build instructions! There are a few
places where the operations and their order is important for
(possibly) subtle reasons; please follow along as we go through the
steps, even if you are an expert.
Meggy Jr kit!
The first part on our list is
#1
,
the Meggy Jr printed circuit board:
In most of the remaining steps, we’ll be
adding components to this circuit board.
STEP 2: Bill of Materials