WordClock-2 Assembly Guide 4/20/20 Version 1.3
Page 7
R3-R4
2
Resistor
10k
brown-black-orange-gold or
Brown-black-black-red-gold
R5
1
Resistor
120k
brown-red-yellow-gold or brown-red-black-
orange-gold
R6-R9 (Not
Used)
4 (0)
Resistor SMD
230R or
315R
Orange and Super Red – 315R, Others
230R (supplied value may vary slightly)
R10-R12
3
Resistor
4.7k
Resistor array
R13, R14,
R17, R18,
R24, R28
6
Resistor SMD
270R or
180R
Orange and Super Red – 270R, Others
180R (supplied value may vary slightly)
R15, R16,
R19, R20,
R21, R22,
R23, R25,
R26, R27
10
Resistor SMD
150R or
90.9R
Orange and Super Red – 150R, Others
90.9R (supplied value may vary slightly)
R29
1
Resistor
9k
white-black-red-brown or white-black-
black-brown-brown
R30
1
Resistor
1.2k
brown-red-red-brown or brown-red-black-
brown-brown
SW1-SW2
2
Button
90 degree pushbutton
U1
1
IC
LM2576T5.0
Not interchangeable with U8!
U2
1
Microcontroller
ESP32-
PICO-KIT
Programmed with WordClock firmware
U3
1
IC
74AHC125D
U4
1
IC
HT16K33
U5-U6
2
IC
TBD62783
U7
1
IC
ULN2803
U8
1
IC
LM2576ADJ
Not interchangeable with U1!
U9 (U9-
U10)
1 (2)
IC
74HC04D
1 Header
40 pins. Cut to 2x17 for microcontroller
3 or
120
(4 or
160)
Pin Header
3 (4) Headers with 40 pins each, or
individual pins
2 Bracket
Keystone 4326
