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Hi, what frequency resolution do you want for your frequency counter? in other words: You have a 4 digit display. but "15" needs only two digits and "200" needs only 3 digits. Do you want it to show "0200" Hz or "200.0" Hz? **** Technically you need a signal gating with exact timing. 1.000 seconds for example. As long (...)
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hello, For 10 KHz I get 10000 and 10001 Hz fluctuating. it could be normal.. because measuring round value, so +- 1 digit => +-1 Hz and also temperature shift => Quartz FOSC shift for lower frequency , less than 2000Hz, i wrote a programe to generate a frequency at +- 0,05Hz of resolution, ( NOT the ACCURACY !) with a
A long time ago (in 1974 :-?) I've used such Nixie tubes (type Z560M, made in DDR), with a SN74142 from Texas (a decimal counter and high-voltage driver). The anode voltage was around +150v, without any current limiting resistor. It was a 6-digit (cascaded) frequency counter for max. 20 MHz but - using different SPI-like interfaces - you can
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You can always start by writing the 3-digit counter and verify that it is working. If it counts correctly from 000 to 999. Then write the UART communication part to receive text from another mcu. You can either test it with proteus sim using the "virtual terminal" to make sure that it is working properly by sending the command text to it to
If you show your schematic in PNG format, you'll probably get some help. Not everyone has Proteus 8 and many dont use Proteus at all. As for me, I am still using ver 7.8 SP2. Allen
PORTA=%11011111 This takes pin A5 low. digit zero common is on A0, so I would expect:PORTA=%11111110 (I assume that your BASIC compiler accepts binary numbers with bit 0 last, but I am not familiar with that compiler) You are probably over-driving the PIC outputs. Properly designed circuits have current limiting
Hello there, I have a FPGA board which has 4 seven segment elements having all the elements connected in parallel ie. element 'a' of all four units are in parallel and so on. I wanted to display four distinct characters in the four units viz 'F.P.g.A.'. Is there any way to do so. I tried the following way: Described a process A which is
Just use a mechanical counter that is triggered like a relay. Or get something like this :- Frank
I ended up doing the same thing for my homebrew 6-digit frequency counter. A lot of soldering. Innumerable wires. The two counter IC's can each drive a 3 digit display. But my local Radio Shack only had 2 digit displays. I purchased three of them. Then I had to slice through copper traces on the middle (...)
1. What type of unit get for counting is potential free or any other 2. How u set Preset count value 3. What bout power supply 4. Is any relay or Buzzer output after Count complete 5. Is project use for commercial level or Project level 6. What type Enclosure u plan Answer this
Hi all , I needed a small 5 digit LCD but I couldn't find it . I bought a counter (like picture below) and opened it . I want to drive the LCD but I don't know how to do it . I attached the counter and it's internal board . the Via in internal board is connected to the LCD . please help me .
To start with, I am using 7-segment LED display common cathode. You need common anode display not common cathode. datasheet of 74LS47. and its connection
There's an Australian hobbyist magazine called "Silicon Chip" that ran such a project a few months back - have a look at: Item 6 in the table of contents is part 1 of their "2.5 GHz 12 digit frequency counter" using a PIC16F877 and 7 segment displays. Yes I
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
Hi every one and thanks for looking at my post ;-) ive got a Decade counter circuit which is ok ive added a start / stop and a reset button to the diagaram - but what i want to be able to do is the following 1) Add a 2nd set of 7 digit display's which i have done under livewire and they power up but i want them to show the high count ie if
Here is my recent project using is pretty simple and useful for Arduino beginners. 83767 Single digit Decimal counter using Arduino You cam find the schematic and code in my Electronics blog -
Use this for sensing pulse : Output from EasyPulse connect to 3-digit counter circuit with 89C51/C52. You can replace TCRT1000 with L-53P3C 5mm phototransistor or some other, and MCP6004 can be replaced with LM324D, for TX led I use red 5mm high bright 15000mcd, and all works fine. This circ
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? unsig
Hi Masters, I have written a code for 4 digit 7Seg display counter. There is some error in my code, when i simulate in Proteus 4th, 3rd and 2nd display is not showing Zero (0). Please help. Code: #include #define uchar unsigned char #define uint unsigned int sbit clear = P3^4; uchar code DSY_CODE= { 0xc0,0xf
can any one help me how to a mke a fractional counter with upto 2 places of decimal not only tradition value like .5 but also value eg 11.92 , 20.05,.???
I posted a 3-digit BCD counter code in this it's for a Spartan-3e kit, it might help you in coding. And try commenting your code as it helps others analyze it. Regards...
:) Hey! i'm doing a project in spartan 3e using fpga! i'm really trying to do a clock but i can't do it ...i don't know even how too start.. Then I guess some reading is in order.
I have 8 segment displays, left four of them would be representing voltage and right four would be displaying current. i have made a prototype board to check it. there are two values i.e. current and voltage but all displays are multiplexed togeather. now i want to interface a rotary encoder and when i push a button then a digit starts to blink and
I made a plastic shuffle board table few years ago. For my updating, this week been running 12v system LED's in the support structure and I want to add a point counter in a tree form. Yellow (5) on the bottom and blue/red (4 each). Scoring would go like this, yellow in five digit increments, blue/red would light up for 6,11,15,20 and stay lit til
i recently acquired an intermittently working LEADER LDC 824 frequency counter in a deal that is hard to resist (reads from 10hz to 520mhz) sometimes it works (reads frequency) after 20mins warmup, sometimes after an hour other times it wouldn't work even after 2hours warmup time. Also at times it works even when the set is cold then suddenly st
Hi, I'm a total newcomer to the world of electronics and in need of some advice. I have a Future Kit 936 4 digit digital counter. I have assembeled the kit no problem and all is fine with the 4 digit display. I need to change the display to a 2 digit as the display will be mounted away from the board and (...)
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 ^_^
Four-digit frequency counter (schematic: )
You can build it with only 2 x MC14553 + 1 x MC14543, look at inside the MC14553 datasheet.
Hi Friends. my project is digital clock with 7-segment(only hour and minutes) with atmega16 and it's timer1 compare mode. Please review my code and say to me if anything is wrong. when I simulate it, always show 0 in four 7-segments. I written this with CodeVisionAVR . #include #include #include #includ
here is picture of my LG remote with keys press 0 , 1 , to , 9 . 59941599495994859947599465994559944599435994259950[/
check out my website: All About VHDL Codes, PCB Designing and AVR heres my rtc project: All About VHDL Codes, PCB Designing and AVR: RTC on FPGA with manual set synthesizeble VHDL code.
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 (...)
Fvm, Nice to see reply from you. Can i use 74ls90 and 74HC4511 insted of 7490 counter and 7447 7 segment decoder? actually i am confused with the counter.. how i going to make sure that the counter count each time is equal to 1second? means when it count 1 = 1s, count 2 = 2s and so on..
can someone help me on how to make down counter on 7-segment? the counter must count from 99 to 00.. thanks :)
Hi, I have seen some posts about up and down counter but not what I was looking for. I don't know much about electronics, so i'm a truly beginner. I was looking for a schematic of a Up and Down counter with reset button and that could be presettable in the inside (with switches for example). The main idea is a gadget to use with a card g
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.
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
can somebody please give me the circuit diagram of 2 digit synchronous down counter using 74192. thanx
hi :D 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 original program Dim digit As Byte 'input variable for GETMASK subroutine Dim digit1 As Byte 'current (...)
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 (...)
connect your counter input to any of the external interupt 0(p3.2). #include.... int counter; . . . . void externalcount interrupt 0 { counter++; } void init() { ;enable external interupt } void main() { init() while(1) { ; convert the (...)
My teacher give me exercise Design 4 digit conuter by ic counter(digital IC): _up/down counter 0000-9999 _control up/down _we can setup initial cardinal number thank you P/s: i'm vietnamese, so i write english not well
My manufacturing company is selling the following equipment. Anyone interested or know a potential buyer? Leader LDC-822 digital counter 80MHz VFD S/N 5050039 Hameg HM208 Oscilloscope S/N 20838/86 Fluke 77 DMM 3200 Count Bar Graph S/N 41630271 Fluke 77 DMM 3200 Count Bar Graph S/N 57800094 Keithley 197 DMM 5.5 digit TRMS (...)
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
can any one help me plz on my project.. i need a ckt that count 0-24 and 24-0 plz help me..
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 Nandhu
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