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Generador de caracteres
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Introduction
History: memory you cannot erase
Lesson 1. ROM point: a transistor is a bit
1.1. The idea: a bit you cannot erase
1.2. Build
1.3. Check
Paste for lesson 1 (Cmd+I)
Lesson 2. Decoder: the code selects a row
2.1. The idea: two steps of two bits
2.2. Build
2.3. Check
Paste for lesson 2 (Cmd+I)
Lesson 3. Character generator: characters 0–7
3.1. The idea: a row is a character, a column is a point
3.2. Build
3.3. Check
Paste for lesson 3 (Cmd+I)
Lesson 4. Characters 8–F: a file with the whole matrix
4.1. What is in the file
4.2. Check
Lesson 5. Your own character
5.1. Draw a character
5.2. Build
5.3. Check
Summary
All the parts
Instructions in pictures
Lesson 1 in pictures
← Back to the lesson: Lesson 1. ROM point: a transistor is a bit
1
A ROM dot
our own NOT and AND, then a resistor + a transistor: a bit
kh
HB-01
1
s
Qa
Qb
IN
3×
OUT
2×
P
4×
N
5×
VCC
1×
GND
1×
0
1×
2×
2×
∞
Ctrl
+
G
NOT
AND
© 2026 Daniil Khanin · khanin.info · HB-01
4
NOT
1
IN
1×
OUT
1×
P
1×
N
1×
6×
I0
O0
VCC
O0
G
P
I0
O0
GND
G
N
I0
2
Ctrl
+
G
Library
…
Chip N
2×
Library
…
NOT
Enter
NOT
I0
O0
© 2026 Daniil Khanin · khanin.info · HB-01
5
AND
3
IN
2×
OUT
1×
P
2×
N
1×
9×
I0
I1
O0
VCC
n
G
P
I0
VCC
n
G
P
I1
n
mid
G
N
I0
4
N
2×
P
1×
9×
mid
GND
G
N
I1
VCC
O0
G
P
n
O0
GND
G
N
n
© 2026 Daniil Khanin · khanin.info · HB-01
6
AND …
CANVAS
5
Ctrl
+
G
Library
…
Chip N
2×
Library
…
AND
Enter
AND
I0
I1
O0
6
VCC
1×
GND
1×
0
1×
3×
VCC
VCC
GND
GND
0
s
7
1×
N
1×
NOT
1×
7×
VCC
a
a
GND
G
N
s
NOT
I0
a
O0
Qa
© 2026 Daniil Khanin · khanin.info · HB-01
7
CANVAS …
8
1×
1×
Qa
9
1×
NOT
1×
1×
5×
VCC
b
NOT
I0
b
O0
Qb
Qb
0
s
Qa
Qb
1
s
Qa
Qb
© 2026 Daniil Khanin · khanin.info · HB-01
8
← Back to the lesson
Lesson 1. ROM point: a transistor is a bit