182 Threads found on edaboard.com: Counter Schematic 1
I need Pulse counter schematic, which count data from LED / LDR pulse.If you have please help.
Microcontrollers :: 14.06.2011 23:55 :: khossanr :: Replies: 1 :: Views: 566
i recomend a bit scope as a kit
it is able to count to 1 ghz uses a pic877
has some other features and you can export data to a pc from it
it has four channels of 100mhz bandwidth scope
a mv meter and a 1 ghz counter
all in one
cost about 280 euro to get the full kit
assembled in about a
Professional Hardware and Electronics Design :: 02.03.2002 09:49 :: THE BORG :: Replies: 10 :: Views: 5269
this is a nice circuit
i like it
i like it
but i for many years used a nixie tube counter
my internal refresh rate is set to the same flicker as the refrsh
i find nixie more responsive
and the thing all lcd weened guys seem to lack when they use one they love it
i used one made by R
Hobby Circuits and Small Projects Problems :: 22.12.2002 21:06 :: sick_man :: Replies: 15 :: Views: 10753
please everybody help me, i had build counter up/down using IC HCC40110B, and the circuit is running well, but if i push the stop button, the counter digit on 7-segment not stop fully, so that please help me to find this problem....
Hobby Circuits and Small Projects Problems :: 28.04.2008 03:14 :: bharitta :: Replies: 11 :: Views: 2260
hello every one can u help me out with preset counter circuitry plzz i need a preset counter schematic plzzz help
Hobby Circuits and Small Projects Problems :: 12.01.2009 10:41 :: munaim :: Replies: 1 :: Views: 1468
I need pls a service manual/or schematic for my newer Philips counter, PM6614.
Best thanks in advance.
Service Manuals, Requests, Repair Tips :: 27.06.2010 15:52 :: karesz :: Replies: 0 :: Views: 1190
The basic idea for any frequency counter is to set a timer, wait till the input on a pin change, calculate the time taken and find the inverse.
There are lots of schematics on the net, use google.
A very crude design can be found here :
Try searching for PIC frequency cou
Microcontrollers :: 30.06.2010 06:14 :: eXnol :: Replies: 1 :: Views: 769
we design a pulse counter circuit in pic16f877a.sensor is npn or pnp.also this sensor operating voltage i need perfect isolation circuit using opto coupler and driving circuit for pulse to the input of pic.anybody give me the circuit?
Power Electronics :: 14.10.2011 03:04 :: muthuk :: Replies: 0 :: Views: 1062
Hello, I need to make a frequency counter accurate to the Hz. I have made a quite accurate OCXO on 10.7mhz, but the frequency counter schematic I have found on the net uses a 4MHz crystal.
So I need a divider to divide down the 10.7mhz to 4mhz, since I do not know how to alter the code.
Analog IC Design and Layout :: 12.12.2012 19:30 :: neazoi :: Replies: 14 :: Views: 395
i want to make simple project.i want to make timer counter.
but only five minute.five minute later counter is stop.
when i press button counter is starting..
5 minute later, automatic alarm and i press button again and stop sound.
or automatic stop (1 minute sound)
yes how is making it?
i want schematic and pcb (...)
Hobby Circuits and Small Projects Problems :: 14.04.2003 18:42 :: SeTRoX :: Replies: 8 :: Views: 2025
can someone indicate me the link where to find the project of a simple frequency counter without MCU?
A simple project with at least 6 leds display
it is also all right a 10-50 Mhz
Hobby Circuits and Small Projects Problems :: 26.05.2003 07:41 :: leemarrow :: Replies: 4 :: Views: 3933
Have you heard of google? (o;
Returns lots of information when you search for "freqency counter schematic" like:
I assume you want to do it on a discrete basis?
Or you intend to use microcontroller/CPLD/FPGA?
And do not forget to also search in here!!!
Hobby Circuits and Small Projects Problems :: 26.07.2004 08:00 :: davorin :: Replies: 3 :: Views: 1335
I have built a timing circuit for running a clock. The digits in my clock are Nixie tube display and they require 170 volts to operate. I have built a power supply to provide both 9 volts for the timer and 170 dc for the Nixie tubes.
I am having trouble switching the 170 volts to the tubes. I have used a transister to drive a solid sta
Electronic Elementary Questions :: 27.08.2004 00:45 :: daisy744 :: Replies: 5 :: Views: 2264
Could this counter can be implemented?
This counter has three input, reset (clear),set(stop the counter),clock,
I want all these inputs can triggered the counter by rising edge.
How to implement this logic? Could someone kindly provide the VHDL code?
Thanks a lot
DDF with Synchronous Preset
PLD, SPLD, GAL, CPLD, FPGA Design :: 02.12.2004 07:09 :: Black Jack :: Replies: 3 :: Views: 998
Thanks of all.
I want to find such a book: with some common using logic circuit,such as counter,shift register. Although they are simple, but when I use the schematic entry
method ,I had to infer it from true table and then enter it..
So I want to find a refenrence book ...
Added after 6 minutes:
ASIC Design Methodologies and Tools (Digital) :: 20.01.2005 03:42 :: iamczx :: Replies: 7 :: Views: 781
Some interesting links for PIC based frequency counters up to 2.5GHz.
Professional Hardware and Electronics Design :: 04.03.2005 01:22 :: Borber :: Replies: 12 :: Views: 5659
I need Microcontroller base schematic miles counter for bike on LED 7 Segment Display.
Microcontrollers :: 04.02.2005 07:55 :: Sheeraz Khan :: Replies: 2 :: Views: 778
I'm trying to build a beats-per-minute counter.
I've got the microcontroller part all ready and done, however, I'm having trouble with the circuit which is supposed to generate a nice digital wave form (with a change from down to up on a beat). Here is what I did, and it works fine as long as there's a steady and simple beat :/
Analog Circuit Design :: 13.02.2005 12:02 :: eranrund :: Replies: 0 :: Views: 581
What is the difference between shift counter and binary counter ???
How will it make difference in the HDL code ?
See GOOGLE for "Johnson counter"
PLD, SPLD, GAL, CPLD, FPGA Design :: 06.04.2005 10:15 :: Black Jack :: Replies: 4 :: Views: 1151
I hvae design very simple 2 bit up counter by using Xilinx schematic. I am using Xilinx 7.1i and test bench o/p show correctly(0-1-2-3-0). But when I download to XC9572 cpld it show on 7-seg display as down counter (0-3-2-1). I attached my sch file for your ref.
What's wrong with my sch or any other setting for cpld.
PLD, SPLD, GAL, CPLD, FPGA Design :: 16.08.2005 04:38 :: MRFGUY :: Replies: 3 :: Views: 589
I tried to simulate MOD-16 asynchronous counter (see attached figure) using Pspice schematic (Orcad v10.0). Pls find the schematic and simulation files in the RAR file. When I run the simulation, I got the error as shown in the attached figure. Would anyone pls advise what's wrong with my schematic or settings? Thanks.
Software Problems, Hints and Reviews :: 03.10.2005 07:34 :: student2005 :: Replies: 1 :: Views: 948
hello , i plan to build a simple man machine counter using microcontroller, if someone who passes that machine, counter increases to one and soon, any idea how i must do first? or any related website?
Microcontrollers :: 05.10.2005 10:12 :: ilop :: Replies: 3 :: Views: 484
I use various Xilinx FPGAs, so I recommend the inexpensive Spartan-3 FPGA. Even the smallest one has over 1500 flip-flops, plenty to build a few programmable counters. 160 MHz is fine.
You can buy the Spartan 3 Starter Kit from either Xilinx or Digilent. Digilent offers kits with different-size FPGAs, but I think you have to download the develop
PLD, SPLD, GAL, CPLD, FPGA Design :: 05.11.2005 05:19 :: echo47 :: Replies: 2 :: Views: 956
I am working with a XC9572-pc44 CPLD using the free Webpack ISE7.1.1 For some unconown reason the simply implemented 8 bit binary counter ("hello world") won't do it's thing. Instead of having each bit deviding clock's frequency by 2, the frequency of each bit is clock/2. In addition the bits are jiggling in phase like:: 101010100101
PLD, SPLD, GAL, CPLD, FPGA Design :: 11.01.2006 16:00 :: shell_inspector :: Replies: 4 :: Views: 2769
This circuit is 0-99 up-down-reset counter. Circuit is perfect running.
Hobby Circuits and Small Projects Problems :: 01.05.2006 03:54 :: picagor :: Replies: 4 :: Views: 4370
U can use a presettable counter that counts for N number of times. Tharts the LSB of the counter providing the N pulses.
Analog Circuit Design :: 03.06.2006 11:01 :: gharuda :: Replies: 1 :: Views: 495
Dear folks, is there a simple way, or an EDA tool to convert the HDL, either verilog or VHDL to a gate level schematic?
e.g, we wrote a 6bit up-down-counter with preset function, what can we do to quickly map the HDL to a real schematic.
Analog Circuit Design :: 08.09.2006 04:21 :: neo :: Replies: 0 :: Views: 928
I want to build a 3-bit synch. Up/down counter using T Flip Flops
Hobby Circuits and Small Projects Problems :: 03.10.2006 05:52 :: fm_com_28 :: Replies: 4 :: Views: 7997
budhy, that looks like an up-only counter. He's looking for up-down.
A microcontroller would be a nice solution.
Hobby Circuits and Small Projects Problems :: 31.10.2006 21:43 :: echo47 :: Replies: 10 :: Views: 9277
I want to make a project on trafic light through microcontroller. The controller must work for four directions. There must be a counter and lcd which shows the remaining time for all other directions. If someone have a schematic diagram I'll modify according to my requirment.
your help will be appriciated.
Microcontrollers :: 15.11.2006 11:37 :: orak :: Replies: 4 :: Views: 4575
Simply said. You cannot make a frequency counter to UHF if you have not rather large experinces in radio technic.
It is not just a question of schematic.
Electronic Elementary Questions :: 06.02.2007 03:02 :: servicemann :: Replies: 4 :: Views: 1187
similar to up counter (using -ve trigerred flipflops);but connect Q to clk of following f.f
Analog IC Design and Layout :: 23.03.2007 12:06 :: IBO :: Replies: 4 :: Views: 4377
Well its quiet easy
firstly convert a JK FF CD4047 to toggle mode by shorting J K inputs to Vcc, D FF can be in toggle mode by shorting Q Bar output to D input. For a decade counter you will need 4 toggle FF JK or D.
LSB FF will be given direct clock. Second most LSB FF will have clock i,e AND of original clock & LSB clock. Next bit FF has
Hobby Circuits and Small Projects Problems :: 05.05.2007 12:55 :: bigaussie :: Replies: 11 :: Views: 1642
i biult a single character 5x7 LED display with a single CD4017 counter and it worked perfectly, but when i expanded the display to an 8 character 5x7 display(having 40 columns) and cascaced 5 counters there was a problem.the counters didnot count to the end they always stoped at a certain point.i made use of the cascadin
PC Programming and Interfacing :: 09.05.2007 23:41 :: fazan83 :: Replies: 1 :: Views: 3848
just use the motorola frequency divider(prescalar).....mc12028 or similar......
it divides the frequency by 64 ....then it is easy to measure....i do have a home built frequency counter.using pic microcontroller.if you need it msg me.
RF, Microwave, Antennas and Optics :: 29.07.2007 12:35 :: roykyn :: Replies: 2 :: Views: 850
Hi all, i'm new to this forum!
For many reasons (Which i'm not listing here...) i need to make a Geiger counter, but i've nearly no experience in this brand of electronics, so i'm asking to you some support.
I've already bought the Geiger tube: an LND 712
basically, i need a circuit to extract a di
Analog Circuit Design :: 16.08.2007 12:49 :: oslinux :: Replies: 5 :: Views: 1778
i got this freq counter from internet and i want to developed my own software. The schematic is attach and the url is
This f counter used pll ic from national (lmx2346) and capable to measure freq up to 2.5 Ghz. This ic used to divided freq input by 64 and programmed by spi interfa
Microcontrollers :: 08.10.2007 05:46 :: henryshb :: Replies: 0 :: Views: 486
I have downloaded a time trial version of Multisim simulation software as advised by forum members but it's blowing me over a bit. I can't seem to progress because the software 'Footprints' of many devices are unfamiliar to me. To save you downloading a large JPG picture image I've put a link to my Homepage showing part of my basic circuit c
Software Problems, Hints and Reviews :: 16.10.2007 10:12 :: johntee :: Replies: 0 :: Views: 898
how to make divide 60 counter
ASIC Design Methodologies and Tools (Digital) :: 21.10.2007 00:41 :: seemagoyal44 :: Replies: 12 :: Views: 3016
Back around ISE 5, Xilinx removed the TTL library for a good reason. Using TTL logic equivalents in FPGA or CPLD leads to poor performance and excessive area. I recommend abandoning your search, abandoning schematic entry, and use HDL instead.
Once upon a time, I tried copying a 1970's era video arcade game into an FPGA. It used about a hundred
PLD, SPLD, GAL, CPLD, FPGA Design :: 21.10.2007 21:46 :: echo47 :: Replies: 1 :: Views: 595
There you go:
schematics and C code for a PIC (16F877A) frequency counter operating up to about 50 MHz
Microcontrollers :: 23.01.2008 18:14 :: hugo :: Replies: 3 :: Views: 4755
yes i have stop the counter after one cycle of count that s it should not repeat the u hve idea?
PLD, SPLD, GAL, CPLD, FPGA Design :: 17.02.2008 23:12 :: lalu :: Replies: 6 :: Views: 841
i am trying to code the behavioral VHDL model of the VGA Horizontal counter, from the Enochs book. (as some people have adviced me to make simple things in behavioral model. And i will connect all elements in structural code in the Top source file). Please take a look at the picture of the schematic of Horizontal counter from the (...)
PLD, SPLD, GAL, CPLD, FPGA Design :: 03.03.2008 03:33 :: BlackOps :: Replies: 11 :: Views: 7513
i want to build a counter for my ecg(ekg) final project.
i want do it whit " AVR ".
please help me !
i have a analog output in my schematic.
how can i do this?
can i do this whit " oc1a & oc1b " pins ?
( sorry about my bad english )
Microcontrollers :: 03.01.2009 08:28 :: gharibe_12000 :: Replies: 3 :: Views: 1343
can anybody help me to have a schematic diagram for "4 channel frequency counter" This application for Opto detection thanks in advanced.
Service Manuals, Requests, Repair Tips :: 04.01.2009 08:25 :: asomo2000 :: Replies: 1 :: Views: 869
on good way to solve this is to use some digital device
--- when you power is down where from you are getting the power for the counter circuit. is there any battery i can tell you a circuit which will give you a pulse
when mains is out counting the duration of the pulse you can track the record of MAINSOUT Time
Analog Circuit Design :: 10.07.2009 00:07 :: saeed_pk :: Replies: 5 :: Views: 979
counter hours with cd4026, 999.59 hours
Added after 15 minutes:
sorry, forgot to put the scheme and is also a display of messages
Hobby Circuits and Small Projects Problems :: 18.07.2009 12:24 :: scmael :: Replies: 6 :: Views: 2443
Service Manuals, Requests, Repair Tips :: 30.08.2009 10:16 :: mapleft :: Replies: 3 :: Views: 1588
Whne DIP34 is in up pos, with each INT1 the counter should increment and with DIP34 in down pos with each INT1 press it should decrement. I'm completely new to asm code.
What is UP? What is down? Without a schematic it's really hard to see what you are trying to do. When the switch is down, is it connected to GND? Wh
Microcontrollers :: 02.10.2009 22:21 :: ctownsend :: Replies: 9 :: Views: 3845
I found tube from Geiger BOB33. To avoid thought it to the garbage, I decided to build tool for it.
Very useful was internet and some projects from the web. I didn’t make diagram so don’t look for it.
Principle of w
Show DIY :: 26.02.2010 06:52 :: gres :: Replies: 1 :: Views: 1371