122 Threads found on edaboard.com: 2 Digit Counter
Iam facing displays flickering problam in my project.
Here iam using 74LS373 latches. Iam useing same hardware what vicky19 used .
Instated of Bc547 iam using data latches.
This code i used in my project
Microcontrollers :: 25.05.2006 00:35 :: chanduchi :: Replies: 7 :: Views: 1779
please help me for design of 24h clock /3 digit counter just with gate & BCD counter IC
Microcontrollers :: 05.02.2005 04:41 :: MHML :: Replies: 1 :: Views: 1279
I am looking for up and down counter project with three digits.
if anyone made this project, would you please post it.
I am waiting your posts.
Microcontrollers :: 09.10.2005 11:01 :: hassan1980 :: Replies: 3 :: Views: 692
hello everybody.. i've got a problem here where i can't see the display on my led matrix..
i'm doing a counter and using the led matrix as a display. i've writing a program using assembly languange.
i also checking the voltage between each ic and each output.. the voltage showed around 4~5V but the led matrix still don't light on..
Microcontrollers :: 04.04.2006 22:10 :: arni_jamal :: Replies: 2 :: Views: 1586
i need 2 digit counter
00 until 99 and repeat
using state machine...with RTL
PLD, SPLD, GAL, CPLD, FPGA Design :: 03.08.2006 01:42 :: choonlle :: Replies: 1 :: Views: 1350
connect your counter input to any of the external interupt 0(p3.2).
void externalcount interrupt 0
;enable external interupt
; convert the (...)
Microcontrollers :: 15.05.2010 03:32 :: welove8051 :: Replies: 6 :: Views: 1561
i am trying create 3 digit counter 7 segment. Using pic and basic language
my question why 7segment brightness can not same. my program i deploy from sample program.
any one can help me?
thx in advance
Dim digit As Byte 'input variable for GETMASK subroutine
Dim digit1 As Byte 'current (...)
Microcontrollers :: 03.07.2010 06:58 :: bledhuk :: Replies: 0 :: Views: 1765
You can build it with only 2 x MC14553 + 1 x MC14543,
look at inside the MC14553 datasheet.
Electronic Elementary Questions :: 11.01.2012 14:11 :: aProgrammer :: Replies: 7 :: Views: 2049
hey everyone. i'm trying to eventually build a six digit counter for common cathode seven segment leds. I started off with an example that did two just fine. but everytime I try to add any more to it it refuses to work. I copied an example from a post on this site on how to multiplex them. but still no luck. any ideas?
Microcontrollers :: 11.10.2012 14:01 :: thedarkotaku :: Replies: 0 :: Views: 259
Here is my recent project using is pretty simple and useful for Arduino beginners.
Single digit Decimal counter using Arduino
You cam find the schematic and code in my Electronics blog -
Show your DIY :: 01.12.2012 06:27 :: vividvilla :: Replies: 0 :: Views: 853
I did my Fisrt FPGA project, that is a free running 4 digit counter, Is working like a charm but I think is to much for to litle.
Is my design ok, ?
Have any way to optimize for less resource.
I'm a newby on FPGA, but a experienced microprocessor programer, I'm afraid to use old stuff that is not the best for Fpga world.
Please coment a
PLD, SPLD, GAL, CPLD, FPGA Design :: 27.02.2013 00:19 :: ebclr :: Replies: 0 :: Views: 377
With 4 digit counter and a 7segment driver your design needs 23 macrocells (4x4 +7) ....more if you want the latches between counters and driver.
So you can't fit it into a single PAL or GAL (10 macrocells)l
A small CPLD (64 macrocells, maybe 32) from Altera, Xilinx, Lattice..... should handle your design.
PLD, SPLD, GAL, CPLD, FPGA Design :: 06.10.2003 08:49 :: sc/mp :: Replies: 3 :: Views: 2595
I am working on a 3 digit counter and want to display a number, let's say '263'. This value is stored in a variable (word).
To display the number correctly I need to split this number into three separate variables.
2 into var1
6 into var2
3 into var3
Can anybody help me with a piece of code of with a hint?
Microcontrollers :: 06.01.2004 05:05 :: psmeets :: Replies: 1 :: Views: 931
I just try to design bcd counter (00 to 66) by using verilog. I write verilog code in xilinx and test bench waveform show correctly. Then I try to download to xc9572 cpld. After downloading, when I try to test it start count from 00 to 66 at the first time. Then it back 08 (instead of going back to 00)and later the counter show 08 to 66 only. From
PLD, SPLD, GAL, CPLD, FPGA Design :: 01.03.2005 01:51 :: MRFGUY :: Replies: 3 :: Views: 2307
Actually I plan to test the 2 digits BCD counter display on 7 seg. (in circuit I used two 7493s).
I want to use (your) counter as a module and other module will call this module to run 2 digits BCD counter display on 7 seg. How to do. Pls..
PLD, SPLD, GAL, CPLD, FPGA Design :: 22.06.2005 00:10 :: MRFGUY :: Replies: 3 :: Views: 5302
For someone who starts experimenting with 2051 this is a good site to visit:
(driving 7-segment + keypad ++++)
Hobby Circuits and Small Projects Problems :: 20.08.2005 23:58 :: IanP :: Replies: 4 :: Views: 1488
ok , u can use bistables to do it ,its very simple , look at the pics , it uses 4 jk bistables to get ur number into 4 digit , then u can use any transcoder to get it working on a 7 segment.
i'm joining here also the 74ls192 (an up down counter ) datasheet .
if u need anything else just tell me and i'll try to make complete schematics for u (wh
Hobby Circuits and Small Projects Problems :: 05.06.2006 18:20 :: hassenman :: Replies: 8 :: Views: 2279
i m designing a simple five digit counter which has the input sensor .the sensor is proximity sensor with either pnp or npn type output.
the range is from 10 v to 30 v for pnp or -10 to -30volts for npn.
now i have to feed this to 8051 .how to do this please help.
will be waiting for response
Microcontrollers :: 13.05.2006 02:53 :: vicky29 :: Replies: 2 :: Views: 1569
hi evrey one;
i need some Vhdl Files about 7 Segment counter(4 digit). and Moris Mano Cpu's Design in vhdl. also any other kind of ALU's are wellcom.
tnx to all
Electronic Elementary Questions :: 02.07.2006 17:56 :: rs_408 :: Replies: 5 :: Views: 1324
Plz download the examples of RTL hardware for counter....(2 digit)...
Plz reply me if got any questions..
entity doubledigit is
Port(CLK : in std_logic;
rst : in std_logic;
LEDS1,LEDS0 : out (...)
PLD, SPLD, GAL, CPLD, FPGA Design :: 26.07.2006 11:39 :: choonlle :: Replies: 3 :: Views: 1393
Complete schematic without
Hobby Circuits and Small Projects Problems :: 31.10.2006 20:37 :: budhy :: Replies: 10 :: Views: 9350
A 11 digit counter will work.
Output should be high continously for a period less then 11 and then low for the rest of the cycle.
If outout is high for 2 clocks then it should be low for 9 clocks.
ASIC Design Methodologies and Tools (Digital) :: 07.03.2007 03:40 :: ankit12345 :: Replies: 5 :: Views: 1720
"i think even now 20GHz is too high for frequency counters..."
I do not agree. Nowadays there is very cheap logic available with toggle rates well beyond 20GHz, so counters with input range >20GHz and resolution of 1Hz are easily possible...
RF, Microwave, Antennas and Optics :: 27.08.2007 15:03 :: rfmw :: Replies: 6 :: Views: 860
Hello, first question is where to get PROTEUS library with model of PIC16F819 /818 ?
next, i have programmed my PIC16F819 chip, and connected 7 segment display to it like that:
RB1 - a
RB2 - b
RB3 - c
RB4 - d
RB5 - e
RB6 - f
RB7 - g
VSS connected to Gnd terminal of 7seg as needed.
all connections are OK, programming was successfu
Microcontrollers :: 05.09.2007 07:02 :: BlackOps :: Replies: 2 :: Views: 3451
Taka a look at the 74C92X-seires ..
"4-digit counters with Multiplexed 7-Segment Output Drivers"
Analog Circuit Design :: 02.10.2007 09:40 :: IanP :: Replies: 2 :: Views: 1014
See the datasheet.
Hobby Circuits and Small Projects Problems :: 30.04.2008 16:46 :: mister_rf :: Replies: 11 :: Views: 2287
i need example code counter 2 digit switch up-down 0-99
by 16f877a file.pbp
Microcontrollers :: 03.12.2008 01:09 :: ao_007 :: Replies: 0 :: Views: 1103
Hello to all,
I?m newbie in VHDL programming on FPGA. I need help from all of you out there. Right now I try to write a code for 2-digit BCD down counter, LCD display message and synchronization between both of them.
For 2-digit BCD down counter, here?s my code
PLD, SPLD, GAL, CPLD, FPGA Design :: 08.12.2008 18:52 :: Kekkaishi :: Replies: 1 :: Views: 2322
hi! can someone help me... i want to display the heart beat on 7 segment display using PIC 16F877..the counter will reset every 60 seconds. and if the counts exceed for example 80, the alam will on... each 7segment display from 0 to 9
my question are:
1)I hv problem on how to display 3 digits..unit -->tens-->hundreds ( my display part)
Microcontrollers :: 11.01.2009 02:00 :: ieda :: Replies: 0 :: Views: 729
use 4029 ic it is a decade counter and internal 7 segment driver
to its input clock connect a 555 which is generating a output waveform of 1 sec
you will get the seconds displayed in a simple circuit without using a microcontroller
Electronic Elementary Questions :: 21.04.2009 01:43 :: sau_sol :: Replies: 10 :: Views: 14937
any one know how to write 4 digit 7 segment led display with multiplexing approach for pic18f2480 plz guide me
Electronic Elementary Questions :: 04.08.2009 05:24 :: Anandarj :: Replies: 7 :: Views: 5882
i need to do a 2 digit bcd counter testbench verilog ,here i attached the verilog but i dunno correct a not
Where is the attachment
PLD, SPLD, GAL, CPLD, FPGA Design :: 30.08.2009 22:29 :: nandhu015 :: Replies: 3 :: Views: 1225
can any one help me plz on my project..
i need a ckt that count 0-24 and 24-0
plz help me..
Electronic Elementary Questions :: 28.09.2009 21:06 :: zwer_dy_55 :: Replies: 4 :: Views: 4209
I'm trying to build a circuit to count the number of steps when I go on a run. I need to know the best way to trigger the action of taking a step. The 4 digit counter is no probl em but a switch in the shoes doesn't sound like a good idea.
What are some of the other methods to trigger this. I thought about a cds in the shoe but the doesn't soun
Hobby Circuits and Small Projects Problems :: 23.10.2009 00:41 :: hako90210 :: Replies: 2 :: Views: 1346
My teacher give me exercise
Design 4 digit conuter by ic counter(digital IC):
_up/down counter 0000-9999
_we can setup initial cardinal number
P/s: i'm vietnamese, so i write english not well
Analog Circuit Design :: 01.03.2010 00:02 :: cuocdoi :: Replies: 2 :: Views: 721
You can use 4 LSB port pins connected to a 74LS247
Then for the multiplexing you can use two port pins connected to a 1-4 demultiplexer and one pin for the blinking LEDs for a total of 7 pins.
PORTB0 //To 74LS247 LSB
PORTB1 //To 74LS247
PORTB2 //To 74LS247
PORTB3 //To 74LS247 MSB
PORTB4 //To 1-4 demultiplexer
Microcontrollers :: 12.03.2010 23:33 :: daviddlc :: Replies: 13 :: Views: 7454
you can create a 2 digit BCD counter by using two 4 bit counters and some logic gates.The main idea is that when the count in the first(LSB) counter reaches the value "1001"( 9 in decimal) it is reset to zero and the second(MSB) counter is incremented by '1'.
I am not sure about why you need a 4:1 MUX for (...)
PLD, SPLD, GAL, CPLD, FPGA Design :: 16.05.2010 03:29 :: vipinlal :: Replies: 2 :: Views: 1612
read this article, it may help you to design the counter
Microcontrollers :: 17.08.2010 09:35 :: bassa :: Replies: 2 :: Views: 541
Hello everyone, I made a counter with 3 sectional of the schematic in attachments.On schematic is another pic, and I use the 16f76, 4MHz oscilator.Display with common cathode.
In the Basic, I got the written code and tried to adjust it to end,but i do not now how and i ask for help!
The counter is conceived to work like this: When the timer turns
Microcontrollers :: 03.10.2010 03:15 :: sendms :: Replies: 0 :: Views: 1387
This may be what you have in mind. . Just expand to 4 devices. It's easier to cascade 74LS191 since it has RIPPLE CARRY OUT and DISPLAY BLANKING features.
Analog Circuit Design :: 10.10.2010 19:18 :: KJ6EAD :: Replies: 2 :: Views: 2189
a 8051 or a Pic microcontroller will solve ur problem.Use a 2 dimensional arrray for the purpose.
Electronic Elementary Questions :: 13.10.2010 11:19 :: rahul.6sept :: Replies: 3 :: Views: 1818
this might help you
START: MOV DPTR,#TABLE ;Set the first address segment code table
MOV R0,#00H ;R0 keep count
MOV P2,#00H ;digital Display initialization
S1: INC R0 ;Plus 1 count
CJNE R0,#100,S2 ;Determine whether the maximum count
S2: JB P3.7,$ ;Wait for button
Microcontrollers :: 06.02.2011 10:27 :: santoshaxl :: Replies: 1 :: Views: 2831
can someone help me on how to make down counter on 7-segment?
the counter must count from 99 to 00..
Electronic Elementary Questions :: 29.01.2011 10:35 :: ghie_october :: Replies: 2 :: Views: 1329
Hi everyone I was told to design a counter that will counter the rotation of a car engine in one second. An 8051 microcontroller is to act as the counter. signals from a function generator will act as the signal from the car engine. the results is to be displayed on a 4 digit seven segment. I have finished my hardware but I (...)
ASIC Design Methodologies and Tools (Digital) :: 25.02.2011 15:44 :: coolz14 :: Replies: 0 :: Views: 484
what is the least count of frequency meter used in microwave experiments
Electronic Elementary Questions :: 18.04.2011 04:20 :: googleions :: Replies: 2 :: Views: 521
hi i need to display received string on serial port of 89c52 to display it on seven segment. how can i perform the received data string to 7 segment
i am receiving 10 char string and want display them on 10 different 7 segment.
Microcontrollers :: 19.11.2011 06:37 :: ud23 :: Replies: 10 :: Views: 613
This frequency counter is around about 20 years old. The original version(i guess) was made with PIC16C54 printed in an electronics magazine as a constructional project. I have that issue. It appeared on internet with modifications and improvements.
Frequency counter,PIC 16F84,Weeder Techno
Show your DIY :: 14.12.2011 03:48 :: ALERTLINKS :: Replies: 13 :: Views: 2475
Four-digit frequency counter
Hobby Circuits and Small Projects Problems :: 30.01.2012 15:59 :: alexan_e :: Replies: 1 :: Views: 2513
As i told before, I'm doing a 4 digit digital stopwatch project. It consist of a 555 timer, four 4026 and 4 7-segment display. Everything works fine, but the counter starts the count only on earthing the ground.
Is it due to any grounding problem of my circuit or is there any other solution for it.
Hobby Circuits and Small Projects Problems :: 06.02.2012 05:46 :: avirajose :: Replies: 5 :: Views: 1003
hello to everyone,,,
i have a problem in designing the pcb layout of a 2 digit 7segment display counter using 74LS47 and 74LS192 IC's,,,,,,
can anyone help in designing it's pcb layout,,,,,,,
thank you very much ^_^
Hobby Circuits and Small Projects Problems :: 11.02.2012 11:40 :: useless018 :: Replies: 8 :: Views: 3479