How do i make a small 49MHz Transmitter and Receiver for two little motors? schematic if any one has it and if the one that is already in the first post please tell me
I assume you are going for a synchronous binary counter. In that case a flip flop is complemented when all the bits in the lower significant positions are equal to 1.
As i remember seeing the circuit setup you are missing an AND gate in the beginning, which is setup just like the others. The count enable is connected to the j and k pins of the first flip flop but it should also be connected to an AND gate who's other input is Q of the first flop.
But it looks broken and nothing changes... I google 3-4 bit counters, my circuit looks ok. Something is missing... but still coulnd't solve..
The output of the first AND gate should also be connected to the input of the second AND gate, just as the later gates. I forgot to mention that earlier
I just looked up the design in a book i have, and it shown exactly as your last correction of the circuit besides 1 small proplem which is that the output of the last AND gate is connected to the Q of flip-flop nr 2 in the schematic (see the dot where the output of the last AND gate crosses Q2).
So if all the connections are ok. The circuit should work in reality. If it doesnt work after correcting this then there might be a proplem with the simulation. Make sure all the connections in the simulation are complete, for example if you take a look at the Q output of flip flop 3. You'll see that the wire to the input of the second AND gate is connected to the pin in a manner that might not "complete the circuit". It's positioned so that it touches the Q pin but still is behind the "connection" dot.
I'm not familiar with the simulation so it might not matter, but this circuit should work after you fix the last proplem.
well, I been searching many resources, it seems my circuit is true, I even tried with 3 flip flops for 3 bit counter, it didn't work. I think something wrong about the program, thank you all for your help..
There is nothing wrong with your circuit. I replaced the hex display with four LEDs and it works just fine.
well I replaced with leds too, it didn't work. I set the frequency to 20, then tried 1, 5, 10 maybe 100. maybe it's about multimedia logic. which simulator are you using?
Solved finally. All I had to do is to add preset and clear lines to flip-flops. There it goes: works like a charm.
Your original diagram didn't have presets and clears on the J/K ff's. You changed the models which changed the rules.
you are right, ff's needed to be set, but I couldnt understand the sense, that's why I tried to make work the other one. Well, I still don't know but will try to learn, thanks for your help.
How about include an explanation on the Antergos Download page, or put a link teaching how to do it?
On 64-bit Windows 10, I'm using a Python virtualenv for a project, for which I'd like to serve CGI scripts.
Maybe I want/need to use some of the settings of mod_python... but I can't find a suitable binary installer for that. Or maybe I don't need mod_python. Here are more details of my problem:
- My scripts need to be deployed/deployable on both Win 10 and Ubuntu. No problem, I have all my scripts working just fine on both platforms.
- ...but the instance of Python I need to run is NOT in the Registry; it is the one that activates when I run the vitualenv command "workon".
1) I know there are script-based hacks to get virtualenvs to work... but those won't be portable to our Ubuntu installs. (And of course I HATE having to graft custom "fix me" code at the top of every CGI file.)
2) I can't just "correct" the Windows registry then use "ScriptInterpreterSource Registry" to point to the venv python instance... because that is not right for the REST of my Windows box.
Or it seems I need to use something like mod_python's "PythonInterpreter" directive... but I can't find a Windows binary build of mod_python for Py 2.7, Apache 2.4. Is mod_python still alive? And: would this fix my problem anyways?
I'm not very up on phthon, ok not at all but I don't see why it cannot use #! since perl scripts use it.
@gregg: Thanks for the input... but it doesn't address my problem. I CAN run Python CGI on Windows.... and I CAN run it on Ubuntu.
My application requires the SAME scripts to be deployed to Windows and Ubuntu. And a Python CGI can only have one "#!". The same Python script can't be BOTH:
I could get around Problem 1 if I used the she-bang notation in the CGI scripts tailored for Ubuntu, then used the Apache directive
in my Apache .conf file on Windows... because this means "ignore the she-bang, and use whatever Windows would run on the commandline for a *.py file."
but my project really needs the instance of Python from that project's Python "virtual environment". That is a SECOND copy of Python on my system, located in:
a) Can "ScriptInterpreterSource" be used in a way where it specifies the EXACT Python instance? (I don't think so... maybe someone here can tell me I'm wrong)
b) Maybe mod_python's "PythonInterpreter" directive will work... but is mod_python basically dead? (I can't find a binary build for Windows, Apache 2.4, and Python 2.7.... it doesn't look maintained.)
c) Maybe I can do this with mod_wsgi, and convert my CGI scripts to WSGI.... but that is more work than just one configuration setting since I have to touch every script. AND I can't find a binary build for mod_wsgi for Windows, Apache 2.4, and Python 2.7 either.