WordClock-3 Assembly Guide 2/25/20 Version 0.6
Page 7
Reference
Qty
Part
Value
Note
R4
1
Resistor
2.7k ¼ watt
red-violet-red-gold or red-violet-black-
brown-gold
R5
1
Resistor
62k ¼ watt
blue-red-red-gold or blue-red-black-red-
gold
R7
1
Resistor
7.5k ¼ watt
violet-green-red-gold or violet-green-black-
brown-gold
R8
1
Resistor
2.4k ¼ watt
red-yellow-red-gold or red-yellow-black-
brown-gold
R10
1
Resistor
120k ¼ watt
brown-red-yellow-gold or brown-red-black-
orange-gold
R13-R14
2 Resistor
4.7k ¼ watt
yellow-violet-red-gold or yellow-violet-
black-brown-gold
R19-R21
3 Resistor Array 4.7k ¼ watt
SW1-SW2
2
Button
90 degree pushbutton
U1
1
IC
LM2576T5.0
U2-U3
2 IC
MC3406AP1
U4
1
Microcontroller
ESP32-
PICO-KIT
programmed with WordClock firmware
U5
1
IC
74AHC125D
U6
1
IC
HT16K33
U7-U8, U10
3
IC
TBD62783
U9, U11
2
IC
74HC04D
4 Screw
M3 8mm
4 Standoff
10mm
1 SD Card
programmed with WordClock languages
database
1 Main Board
8 Tube Board
for IV-17 tubes
16 2x6 Male
Header
16 2x6 Female
Header
1 1x40 Female
Header
for ESP32 microcontroller
