|Home > Circuits > Computer > Computer Controlled Frequency Counter/Logic Probe|
|Richard van Wyk||151,249||12||29|
|This circuit is a stable frequency counter accurate to 5 significant digits. The range is 0 - 30MHz with an input sensitivity of greater then 100mV. The probe connects to the PC serial port. So by using the crystal oscillator already present on your PC serial card and software calibration, the Probes' external circuitry is kept to a minimum. Probe 9 can also be used as a logic probe/analyzer using included software (LPROBE92.EXE).|
Download Probe Software, Zipped, 19K
The three triggering modes are:
To Toggle between these use the UP / DOWN arrow keys. To quit from LPROBE press escape.
|Add A Comment|
|this is almost unusable above 1-2 MHZ unless built VERY ADEQUATELY! used IC's will not click in a stable matter and the results will heavily depend on the shape of the signal. and shield heavily the box. COMMENT: tell me about this software & why it is not working in window XP (Editor's notes: NT based OSs don't allow direct hardware access.) there is a small program, that releases the port control, Direct IO if i am remembering right!|
|I THINK is very useful, and I hope in the next mounth to make one. I will you send my opinnion. Thank you very much.|
|thanks a lot good topic|
|tell me about this software & why it is not working in window XP
(Editor's notes: NT based OSs don't allow direct hardware access.)
|Thank you very much, I will definitely make this, I will however re-write the computer code so we can use the NT based platforms.|
|sir i want to know the whole theory & description of this project. Also i want the circuit diagram, its input & output connections for this project.|
|have anyone a schematic or simple circuit diagram? or maybe you know internet shortcut about it?
(Editor's notes: Scroll up 6 inches.)
|where i can get a circuit diagram of it;s. Does it work? R9 and C3 is missing... I want to construckt it|
|this is good cicuit but tell something about softwere regarding this project.|
|This circuit is working please tell me how to bild this one can i use this circuit for mothr board repairing.|
|hi. i want to know about the working process of it's circuit. i want to know more about your project. from where should i get info. Theres any possibilities to make this schematic to be small.|
|could u plz send me all the details of this project as i am interested in making this project in my final year?|
|sir i want to know the theory,circuit diagram, working and full detail about this..plz...send to me all details|
|sir i want to know the theory,circuit diagram, working and full detail about this.|
|sir i want know about its complete theory,working and display at output.and ckt diagram|
|or if it is possible then plz send me some idia about the software that will be useful to me to dusplay data on screen of my computer......|
|dear sir i want to know about computer controlled frequency counter/logic probe with complete theory and where i can collect all the material so kindly inform me i am student of electronics engg so i want to make a project so kindly help me|
|Pls can you give me a simpler circuit diagram, i want to construct it.|
|hi i want to know working principle of this circuit|
|i want to know more about your project. from where should i get info|
|hi. i want to know about the working process of it's circuit.|
|"Editor's notes: Probably a mistake on my part then" - are you going to de-do the schematic then?
(Editor's notes: It's just an error in the parts list. Ignore it.)
|This is very good programe.I need circuit diagram of MICROPROCESSOR 8085|
|Where can I find this ready circuit?|
|Hmm... i wonder how winscope and other pc test software overcome the problem with XP! Perhaps a different approach? Pity... I would have liked to have this tool.|
|hi i just want to no about the computer thank u|
|perfect circuit.......... i've tried it.|
|fine. but its little complex because you didnt use ic|
|I can't seem to find R9 or C3 on the schematic, the parts list shows C3 & R9.
(Editor's notes: Probably a mistake on my part then.)
|All comments are being shown. Show Only Last 10 Comments.||Add A Comment|
If you would like to leave a comment, you can do so using the form below. Comments can be things like suggestions, successes or failures, improvements, similar circuits, error reports, an answer to a previous commenter's question, or anything in between. However if you would like to ask a question it is suggested that you use the forum instead. The forum provides a more robust environment for discussion.
Important: If you post a technical question here, there is no guarantee it will be answered. All technical questions should be posted to the forum. The owner of this site generally does not answer questions in comments.
All comments are subject to approval before they are displayed here, so your comment will not appear immediately. This is done mainly to prevent spam and other abuse. If you wish to remain anonymous, simply enter "anonymous" for your name and/or email.
Back To Circuits Page | Mail Me | Search