Two Digits Led display with PICO and LB-402-MD

This is a Raspberry Pico project, with a micropython app to manage the LB-402-Dn series two-digits led display. In the example LB-402-MD.

Apr 24, 2022

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raspberry pi

micropython

thonny

Components and supplies

Male/Female Jumper Wires

Breadboard (generic)

Raspberry Pi Pico

LB-402-DN

Resistor 221 ohm

Project description

Code

lb402md.py

python

Micropython code for display LB-402-MD. In the example set datetime from pc in rtc of pico, display hh - mm - ss in sequence in the display.

1#diamond2016 - richardg - 25.04.2022
2# lb402md
3from machine import   Pin
4import utime
5from machine import RTC
6
7# assigns segments of pl402md   to pico pins value 1 (high is led off)
8display_dict = {
9    'e1':Pin(1, Pin.OUT,   pull=None, value=1),
10    'd1':Pin(2, Pin.OUT, pull=None, value=1),
11    'c1':Pin(3,   Pin.OUT, pull=None, value=1),
12    'dp1':Pin(4, Pin.OUT, pull=None, value=1),
13     'e2':Pin(5, Pin.OUT, pull=None, value=1),
14    'd2':Pin(6, Pin.OUT, pull=None,   value=1),
15    'g2':Pin(7, Pin.OUT, pull=None, value=1),
16    'c2':Pin(8, Pin.OUT,   pull=None, value=1),
17    'dp2':Pin(9, Pin.OUT, pull=None, value=1),
18    'b2':Pin(10,   Pin.OUT, pull=None, value=1),
19    'a2':Pin(11, Pin.OUT, pull=None, value=1),
20     'f2':Pin(12, Pin.OUT, pull=None, value=1),
21    'b1':Pin(13, Pin.OUT, pull=None,   value=1),
22    'a1':Pin(14, Pin.OUT, pull=None, value=1),
23    'g1':Pin(15,   Pin.OUT, pull=None, value=1),
24    'f1':Pin(16, Pin.OUT, pull=None, value=1)
25}
26
27all_dig1   = {'e1','d1','c1','b1','a1','g1','f1'}
28all_dig2 = {'e2','d2','g2','c2','b2','a2','f2'}
29zero_dig1   = {'e1','d1','c1','b1','a1','f1'}
30zero_dig2 = {'e2','d2','c2','b2','a2','f2'}
31digits_dict   = {
32    ('L',0): zero_dig1,
33    ('L',1): {'b1', 'c1'},
34    ('L',2): all_dig1   - {'f1', 'c1'}, 
35    ('L',3): all_dig1 - {'f1', 'e1'},
36    ('L',4): all_dig1   - {'a1', 'd1', 'e1'}, 
37    ('L',5): all_dig1 - {'b1', 'e1'},
38    ('L',6):   all_dig1 - {'a1', 'b1'},
39    ('L',7): {'a1', 'b1', 'c1'},
40    ('L',8): all_dig1,
41     ('L',9): all_dig1 - {'e1'},
42    ('L','p'): {'dp1'},
43    ('R',0): zero_dig2,
44     ('R',1): {'b2', 'c2'},
45    ('R',2): all_dig2 - {'f2', 'c2'},
46    ('R',3):   all_dig2 - {'f2', 'e2'},
47    ('R',4): all_dig2 - {'a2', 'd2', 'e2'},    
48     ('R',5): all_dig2 - {'b2', 'e2'},
49    ('R',6): all_dig2 - {'a2', 'b2'},
50     ('R',7): {'a2', 'b2', 'c2'},
51    ('R',8): all_dig2,
52    ('R',9): all_dig2   - {'e2'},
53    ('R','p'): {'dp2'} 
54}
55
56def go(cmd):
57    if cmd == "L":
58         for k in display_dict.keys():
59            if (k[-1] == '1'):
60                led   = display_dict[k]
61                print ("led: " + k)
62                led.toggle()
63                 utime.sleep(1.0)
64                led.toggle()
65    elif cmd   == "R":
66        for k in display_dict.keys():
67            if (k[-1] == '2'):
68                 led = display_dict[k]
69                print ("led: " + k)
70                 led.toggle()
71                utime.sleep(1.0)
72                led.toggle()                 
73           
74    else:
75        led = display_dict[cmd]
76         print ("led: " + cmd)
77        led.toggle()
78        utime.sleep(2.0)
79         led.toggle() 
80
81def reset (digit):
82    if digit == 'L':
83        for   k in all_dig1:
84            led = display_dict[k]
85            led.value(1)
86         led = display_dict['dp1']
87        led.value(1)
88    elif digit == 'R':
89         for k in all_dig2:
90            led = display_dict[k]
91            led.value(1)   #high is led off
92        led = display_dict['dp2']
93        led.value(1)
94     else:
95        reset('L')
96        reset('R')            
97            
98def   display():
99    for k in digits_dict.keys():
100        set = digits_dict[k]
101         reset()
102        for segment in set:
103            print (segment)
104             led = display_dict[segment]
105            led.value(0) #low is led   on
106        utime.sleep(1.0)   
107
108def show(digit, number):
109    set = digits_dict[(digit,   number)]
110    reset(digit)
111    for segment in set:
112        print (segment)
113         led = display_dict[segment]
114        led.value(0) #low is led on
115
116def   show2Digits(number):
117    if (number > 99):
118        return
119    reset(0)
120     l = number // 10
121    show('L',l)
122    r = (number - l * 10) % 10
123    show('R',r)
124     
125def hhmm ():
126    rtc = machine.RTC()
127    # (year, month, day[, hour[,   minute[, second[, microsecond[, tzinfo]]]]]) 
128    rtc.datetime()
129    print(rtc.datetime()[4])
130     show2Digits(rtc.datetime()[4]) 
131    utime.sleep (2.0)
132    show2Digits(rtc.datetime()[5])
133     utime.sleep (2.0)
134    show2Digits(rtc.datetime()[6])
135    utime.sleep (2.0)
136     
137while True:
138    hhmm()
139

#diamond2016 - richardg - 25.04.2022
# lb402md
from machine import   Pin
import utime
from machine import RTC

# assigns segments of pl402md   to pico pins value 1 (high is led off)
display_dict = {
    'e1':Pin(1, Pin.OUT,   pull=None, value=1),
    'd1':Pin(2, Pin.OUT, pull=None, value=1),
    'c1':Pin(3,   Pin.OUT, pull=None, value=1),
    'dp1':Pin(4, Pin.OUT, pull=None, value=1),
     'e2':Pin(5, Pin.OUT, pull=None, value=1),
    'd2':Pin(6, Pin.OUT, pull=None,   value=1),
    'g2':Pin(7, Pin.OUT, pull=None, value=1),
    'c2':Pin(8, Pin.OUT,   pull=None, value=1),
    'dp2':Pin(9, Pin.OUT, pull=None, value=1),
    'b2':Pin(10,   Pin.OUT, pull=None, value=1),
    'a2':Pin(11, Pin.OUT, pull=None, value=1),
     'f2':Pin(12, Pin.OUT, pull=None, value=1),
    'b1':Pin(13, Pin.OUT, pull=None,   value=1),
    'a1':Pin(14, Pin.OUT, pull=None, value=1),
    'g1':Pin(15,   Pin.OUT, pull=None, value=1),
    'f1':Pin(16, Pin.OUT, pull=None, value=1)
}

all_dig1   = {'e1','d1','c1','b1','a1','g1','f1'}
all_dig2 = {'e2','d2','g2','c2','b2','a2','f2'}
zero_dig1   = {'e1','d1','c1','b1','a1','f1'}
zero_dig2 = {'e2','d2','c2','b2','a2','f2'}
digits_dict   = {
    ('L',0): zero_dig1,
    ('L',1): {'b1', 'c1'},
    ('L',2): all_dig1   - {'f1', 'c1'}, 
    ('L',3): all_dig1 - {'f1', 'e1'},
    ('L',4): all_dig1   - {'a1', 'd1', 'e1'}, 
    ('L',5): all_dig1 - {'b1', 'e1'},
    ('L',6):   all_dig1 - {'a1', 'b1'},
    ('L',7): {'a1', 'b1', 'c1'},
    ('L',8): all_dig1,
     ('L',9): all_dig1 - {'e1'},
    ('L','p'): {'dp1'},
    ('R',0): zero_dig2,
     ('R',1): {'b2', 'c2'},
    ('R',2): all_dig2 - {'f2', 'c2'},
    ('R',3):   all_dig2 - {'f2', 'e2'},
    ('R',4): all_dig2 - {'a2', 'd2', 'e2'},    
     ('R',5): all_dig2 - {'b2', 'e2'},
    ('R',6): all_dig2 - {'a2', 'b2'},
     ('R',7): {'a2', 'b2', 'c2'},
    ('R',8): all_dig2,
    ('R',9): all_dig2   - {'e2'},
    ('R','p'): {'dp2'} 
}

def go(cmd):
    if cmd == "L":
         for k in display_dict.keys():
            if (k[-1] == '1'):
                led   = display_dict[k]
                print ("led: " + k)
                led.toggle()
                 utime.sleep(1.0)
                led.toggle()
    elif cmd   == "R":
        for k in display_dict.keys():
            if (k[-1] == '2'):
                 led = display_dict[k]
                print ("led: " + k)
                 led.toggle()
                utime.sleep(1.0)
                led.toggle()                 
           
    else:
        led = display_dict[cmd]
         print ("led: " + cmd)
        led.toggle()
        utime.sleep(2.0)
         led.toggle() 

def reset (digit):
    if digit == 'L':
        for   k in all_dig1:
            led = display_dict[k]
            led.value(1)
         led = display_dict['dp1']
        led.value(1)
    elif digit == 'R':
         for k in all_dig2:
            led = display_dict[k]
            led.value(1)   #high is led off
        led = display_dict['dp2']
        led.value(1)
     else:
        reset('L')
        reset('R')            
            
def   display():
    for k in digits_dict.keys():
        set = digits_dict[k]
         reset()
        for segment in set:
            print (segment)
             led = display_dict[segment]
            led.value(0) #low is led   on
        utime.sleep(1.0)   

def show(digit, number):
    set = digits_dict[(digit,   number)]
    reset(digit)
    for segment in set:
        print (segment)
         led = display_dict[segment]
        led.value(0) #low is led on

def   show2Digits(number):
    if (number > 99):
        return
    reset(0)
     l = number // 10
    show('L',l)
    r = (number - l * 10) % 10
    show('R',r)
     
def hhmm ():
    rtc = machine.RTC()
    # (year, month, day[, hour[,   minute[, second[, microsecond[, tzinfo]]]]]) 
    rtc.datetime()
    print(rtc.datetime()[4])
     show2Digits(rtc.datetime()[4]) 
    utime.sleep (2.0)
    show2Digits(rtc.datetime()[5])
     utime.sleep (2.0)
    show2Digits(rtc.datetime()[6])
    utime.sleep (2.0)
     
while True:
    hhmm()

lb402md.py

python

Micropython code for display LB-402-MD. In the example set datetime from pc in rtc of pico, display hh - mm - ss in sequence in the display.

1#diamond2016 - richardg - 25.04.2022
2# lb402md
3from machine import  Pin
4import utime
5from machine import RTC
6
7# assigns segments of pl402md  to pico pins value 1 (high is led off)
8display_dict = {
9    'e1':Pin(1, Pin.OUT,  pull=None, value=1),
10    'd1':Pin(2, Pin.OUT, pull=None, value=1),
11    'c1':Pin(3,  Pin.OUT, pull=None, value=1),
12    'dp1':Pin(4, Pin.OUT, pull=None, value=1),
13    'e2':Pin(5, Pin.OUT, pull=None, value=1),
14    'd2':Pin(6, Pin.OUT, pull=None,  value=1),
15    'g2':Pin(7, Pin.OUT, pull=None, value=1),
16    'c2':Pin(8, Pin.OUT,  pull=None, value=1),
17    'dp2':Pin(9, Pin.OUT, pull=None, value=1),
18    'b2':Pin(10,  Pin.OUT, pull=None, value=1),
19    'a2':Pin(11, Pin.OUT, pull=None, value=1),
20    'f2':Pin(12, Pin.OUT, pull=None, value=1),
21    'b1':Pin(13, Pin.OUT, pull=None,  value=1),
22    'a1':Pin(14, Pin.OUT, pull=None, value=1),
23    'g1':Pin(15,  Pin.OUT, pull=None, value=1),
24    'f1':Pin(16, Pin.OUT, pull=None, value=1)
25}
26
27all_dig1  = {'e1','d1','c1','b1','a1','g1','f1'}
28all_dig2 = {'e2','d2','g2','c2','b2','a2','f2'}
29zero_dig1  = {'e1','d1','c1','b1','a1','f1'}
30zero_dig2 = {'e2','d2','c2','b2','a2','f2'}
31digits_dict  = {
32    ('L',0): zero_dig1,
33    ('L',1): {'b1', 'c1'},
34    ('L',2): all_dig1  - {'f1', 'c1'}, 
35    ('L',3): all_dig1 - {'f1', 'e1'},
36    ('L',4): all_dig1  - {'a1', 'd1', 'e1'}, 
37    ('L',5): all_dig1 - {'b1', 'e1'},
38    ('L',6):  all_dig1 - {'a1', 'b1'},
39    ('L',7): {'a1', 'b1', 'c1'},
40    ('L',8): all_dig1,
41    ('L',9): all_dig1 - {'e1'},
42    ('L','p'): {'dp1'},
43    ('R',0): zero_dig2,
44    ('R',1): {'b2', 'c2'},
45    ('R',2): all_dig2 - {'f2', 'c2'},
46    ('R',3):  all_dig2 - {'f2', 'e2'},
47    ('R',4): all_dig2 - {'a2', 'd2', 'e2'},    
48    ('R',5): all_dig2 - {'b2', 'e2'},
49    ('R',6): all_dig2 - {'a2', 'b2'},
50    ('R',7): {'a2', 'b2', 'c2'},
51    ('R',8): all_dig2,
52    ('R',9): all_dig2  - {'e2'},
53    ('R','p'): {'dp2'} 
54}
55
56def go(cmd):
57    if cmd == "L":
58        for k in display_dict.keys():
59            if (k[-1] == '1'):
60                led  = display_dict[k]
61                print ("led: " + k)
62                led.toggle()
63                utime.sleep(1.0)
64                led.toggle()
65    elif cmd  == "R":
66        for k in display_dict.keys():
67            if (k[-1] == '2'):
68                led = display_dict[k]
69                print ("led: " + k)
70                led.toggle()
71                utime.sleep(1.0)
72                led.toggle()                
73           
74    else:
75        led = display_dict[cmd]
76        print ("led: " + cmd)
77        led.toggle()
78        utime.sleep(2.0)
79        led.toggle() 
80
81def reset (digit):
82    if digit == 'L':
83        for  k in all_dig1:
84            led = display_dict[k]
85            led.value(1)
86        led = display_dict['dp1']
87        led.value(1)
88    elif digit == 'R':
89        for k in all_dig2:
90            led = display_dict[k]
91            led.value(1)  #high is led off
92        led = display_dict['dp2']
93        led.value(1)
94    else:
95        reset('L')
96        reset('R')            
97            
98def  display():
99    for k in digits_dict.keys():
100        set = digits_dict[k]
101        reset()
102        for segment in set:
103            print (segment)
104            led = display_dict[segment]
105            led.value(0) #low is led  on
106        utime.sleep(1.0)   
107
108def show(digit, number):
109    set = digits_dict[(digit,  number)]
110    reset(digit)
111    for segment in set:
112        print (segment)
113        led = display_dict[segment]
114        led.value(0) #low is led on
115
116def  show2Digits(number):
117    if (number > 99):
118        return
119    reset(0)
120    l = number // 10
121    show('L',l)
122    r = (number - l * 10) % 10
123    show('R',r)
124    
125def hhmm ():
126    rtc = machine.RTC()
127    # (year, month, day[, hour[,  minute[, second[, microsecond[, tzinfo]]]]]) 
128    rtc.datetime()
129    print(rtc.datetime()[4])
130    show2Digits(rtc.datetime()[4]) 
131    utime.sleep (2.0)
132    show2Digits(rtc.datetime()[5])
133    utime.sleep (2.0)
134    show2Digits(rtc.datetime()[6])
135    utime.sleep (2.0)
136    
137while True:
138    hhmm()
139

#diamond2016 - richardg - 25.04.2022
# lb402md
from machine import  Pin
import utime
from machine import RTC

# assigns segments of pl402md  to pico pins value 1 (high is led off)
display_dict = {
    'e1':Pin(1, Pin.OUT,  pull=None, value=1),
    'd1':Pin(2, Pin.OUT, pull=None, value=1),
    'c1':Pin(3,  Pin.OUT, pull=None, value=1),
    'dp1':Pin(4, Pin.OUT, pull=None, value=1),
    'e2':Pin(5, Pin.OUT, pull=None, value=1),
    'd2':Pin(6, Pin.OUT, pull=None,  value=1),
    'g2':Pin(7, Pin.OUT, pull=None, value=1),
    'c2':Pin(8, Pin.OUT,  pull=None, value=1),
    'dp2':Pin(9, Pin.OUT, pull=None, value=1),
    'b2':Pin(10,  Pin.OUT, pull=None, value=1),
    'a2':Pin(11, Pin.OUT, pull=None, value=1),
    'f2':Pin(12, Pin.OUT, pull=None, value=1),
    'b1':Pin(13, Pin.OUT, pull=None,  value=1),
    'a1':Pin(14, Pin.OUT, pull=None, value=1),
    'g1':Pin(15,  Pin.OUT, pull=None, value=1),
    'f1':Pin(16, Pin.OUT, pull=None, value=1)
}

all_dig1  = {'e1','d1','c1','b1','a1','g1','f1'}
all_dig2 = {'e2','d2','g2','c2','b2','a2','f2'}
zero_dig1  = {'e1','d1','c1','b1','a1','f1'}
zero_dig2 = {'e2','d2','c2','b2','a2','f2'}
digits_dict  = {
    ('L',0): zero_dig1,
    ('L',1): {'b1', 'c1'},
    ('L',2): all_dig1  - {'f1', 'c1'}, 
    ('L',3): all_dig1 - {'f1', 'e1'},
    ('L',4): all_dig1  - {'a1', 'd1', 'e1'}, 
    ('L',5): all_dig1 - {'b1', 'e1'},
    ('L',6):  all_dig1 - {'a1', 'b1'},
    ('L',7): {'a1', 'b1', 'c1'},
    ('L',8): all_dig1,
    ('L',9): all_dig1 - {'e1'},
    ('L','p'): {'dp1'},
    ('R',0): zero_dig2,
    ('R',1): {'b2', 'c2'},
    ('R',2): all_dig2 - {'f2', 'c2'},
    ('R',3):  all_dig2 - {'f2', 'e2'},
    ('R',4): all_dig2 - {'a2', 'd2', 'e2'},    
    ('R',5): all_dig2 - {'b2', 'e2'},
    ('R',6): all_dig2 - {'a2', 'b2'},
    ('R',7): {'a2', 'b2', 'c2'},
    ('R',8): all_dig2,
    ('R',9): all_dig2  - {'e2'},
    ('R','p'): {'dp2'} 
}

def go(cmd):
    if cmd == "L":
        for k in display_dict.keys():
            if (k[-1] == '1'):
                led  = display_dict[k]
                print ("led: " + k)
                led.toggle()
                utime.sleep(1.0)
                led.toggle()
    elif cmd  == "R":
        for k in display_dict.keys():
            if (k[-1] == '2'):
                led = display_dict[k]
                print ("led: " + k)
                led.toggle()
                utime.sleep(1.0)
                led.toggle()                
           
    else:
        led = display_dict[cmd]
        print ("led: " + cmd)
        led.toggle()
        utime.sleep(2.0)
        led.toggle() 

def reset (digit):
    if digit == 'L':
        for  k in all_dig1:
            led = display_dict[k]
            led.value(1)
        led = display_dict['dp1']
        led.value(1)
    elif digit == 'R':
        for k in all_dig2:
            led = display_dict[k]
            led.value(1)  #high is led off
        led = display_dict['dp2']
        led.value(1)
    else:
        reset('L')
        reset('R')            
            
def  display():
    for k in digits_dict.keys():
        set = digits_dict[k]
        reset()
        for segment in set:
            print (segment)
            led = display_dict[segment]
            led.value(0) #low is led  on
        utime.sleep(1.0)   

def show(digit, number):
    set = digits_dict[(digit,  number)]
    reset(digit)
    for segment in set:
        print (segment)
        led = display_dict[segment]
        led.value(0) #low is led on

def  show2Digits(number):
    if (number > 99):
        return
    reset(0)
    l = number // 10
    show('L',l)
    r = (number - l * 10) % 10
    show('R',r)
    
def hhmm ():
    rtc = machine.RTC()
    # (year, month, day[, hour[,  minute[, second[, microsecond[, tzinfo]]]]]) 
    rtc.datetime()
    print(rtc.datetime()[4])
    show2Digits(rtc.datetime()[4]) 
    utime.sleep (2.0)
    show2Digits(rtc.datetime()[5])
    utime.sleep (2.0)
    show2Digits(rtc.datetime()[6])
    utime.sleep (2.0)
    
while True:
    hhmm()

Downloadable files

PICo pins

PICO datasheet

PICo pins

Breadboard with display and connections from PICo

foto

Breadboard with display and connections from PICo

pin assignements

connections PICO - display module

pin assignements

PICo pins

PICO datasheet

PICo pins

pin assignements

connections PICO - display module

pin assignements

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