Binary Counter with MicroPython Code on Raspberry Pi Pico

This counter counts numbers from 0 to 31 in binary format and displays them by 5 LEDs.

For converting decimal numbers to binary numbers, and displaying them by LEDs, we can use the following table:

Decimal Number	Binary Number	LED5	LED4	LED3	LED2	LED1
0	0	off	off	off	off	off
1	1	off	off	off	off	on
2	10	off	off	off	on	off
3	11	off	off	off	on	on
4	100	off	off	on	off	off
5	101	off	off	on	off	on
6	110	off	off	on	on	off
7	111	off	off	on	on	on
8	1000	off	on	off	off	off
9	1001	off	on	off	off	on
10	1010	off	on	off	on	off
11	1011	off	on	off	on	on
12	1100	off	on	on	off	off
13	1101	off	on	on	off	on
14	1110	off	on	on	on	off
15	1111	off	on	on	on	on
16	10000	on	off	off	off	off
—–	—–	—	—	—	—	—

From this table you can see that binary sum can be done as follows:

1+0=1
0+1=1
0+0=0
1+1=10

For example the sum of 4+7 is given by:

 100
+111  
1011

So in this project we need to start from 0 and add binary number 1 to it step by step, and at every step turn LEDs on/off accordingly. For this purpose 5 LEDs are connected to 5 GPIO pins of Raspberry Pi Pico through 5 numbers of 220 ohms resistors. MicroPython code for this project is available here, and in this video you can see how it works:

MicroPython code for this project:

# This program counts binary numbers from 0 to 31 and represents them using 5 LEDs
from machine import Pin  #imports Pin method from machine library
from time import sleep   #imports sleep method from time library

# Creating LED objects using Pin method:
LED1=Pin(15, Pin.OUT) 
LED2=Pin(14, Pin.OUT)
LED3=Pin(13, Pin.OUT)
LED4=Pin(12, Pin.OUT)
LED5=Pin(11, Pin.OUT)

# variables used for storing the values of binary numbers:
V1=0
V2=0
V3=0
V4=0
V5=0

# variables used for storing temporary values of binary numbers:
n1=0
n2=0
n3=0
n4=0
n5=0

while True:    
    if (V1==0):
        n1=1
    if (V1==1):
        n1=0
        if (V2==0):
            n2=1
        if (V2==1):
            n2=0
            if (V3==0):
                n3=1
            if (V3==1):
                n3=0
                if (V4==0):
                    n4=1
                if (V4==1):
                    n4=0
                    if (V5==0):
                        n5=1
                    if (V5==1):  
                        n5=0  

    V1=n1
    V2=n2
    V3=n3
    V4=n4
    V5=n5
    LED1.value(V1)
    LED2.value(V2)
    LED3.value(V3)
    LED4.value(V4)
    LED5.value(V5)
    print(V5,V4,V3,V2,V1)
    sleep(1)  # wait 1 second
    
    

For any question about this project you can contact me using the following form or by leaving a comment on YouTube.