Popular recipes tagged "demo" but not "amiga"

Simple Text Mode Digital Oscilloscope Graphics DEMO. (Python)

2014-01-21T19:07:49-08:00

Python recipe 578812 by Barry Walker (apple, demo, graphics, linux, macbook_pro).

This is a DEMO to switch a *NIX terminal from text to _graphics_ mode on the fly.

The graphics characters are limited to lowercase 'a' through 'z' and this DEMO just prints a small subset to see what a fun, kids level, 8 channel Logic-Analyser/Digital-Oscilloscope might look like.

This may not work in every *NIX style terminal but does work on default terminals using bash on OSX 10.7.5, PCLinuxOS 2009 and Debian Linux 6.0.x.

Tested on Python 2.5.x to 3.3.2 on the above platforms... (It might work on earlier versions of Python but untested.)

Enjoy finding simple solutions to often very difficult problems...

Bazza...

A DEMO to show how to write text into the Python terminal Title Bar... (Python)

2013-09-17T17:55:53-07:00

Python recipe 578662 by Barry Walker (apple, bar, cygwin, demo, linux, macbook_pro, title, title_bar).

This DEMO is show how to write some text of your choice into the Title Bar of the Python terminal window.

Firstly it imports "time" just for this demo so that a simple time delay can be generated. Next the Python terminal window is written to for the 5 seconds of delay; see code. And finally the Title Bar is restored to normal...

A snapshot image can be seen here:-

http://wisecracker.host22.com/public/Title_Bar.jpg

Bazza...

Design by contract on python vanilla (Python)

2013-11-05T20:50:30-08:00

Python recipe 578767 by Alan Cristhian Ruiz (demo, design_pattern, productivity). Revision 2.

The code below is an example that shows that we can do design by contract in python without any non-standard module.

DEMO - Generate A Crude 1KHz Sinewave Using A BASH Script. (Bash)

2013-03-01T19:41:47-08:00

Bash recipe 578477 by Barry Walker (audio, bash, demo, generator, linux, shell, sinewave, sound).

A very simple crude sinewave generator using a BASH script inside a Linux Terminal.

The file required is generated inside the code and requires /dev/audio to work.

Ensure you have this device, if not the download oss-compat from your OS's repository...

It lasts for about 8 seconds before exiting and saves a 65536 byte file to your working directory/drawer/folder as sinewave.raw.

Use an oscilloscope to check the waveform generated...

It is entirely Public Domain and you may do with it as you please...

Enjoy finding simple solutions to often very difficult problems... ;o)

Bazza, G0LCU...

DEMO Kids Level Python RF Attenuator... (Python)

2013-02-09T10:21:39-08:00

Python recipe 578451 by Barry Walker (apple, attenuator, audio, demo, linux, macbook_pro, rf, sound, windows).

This code is a DEMO RF Attenuator for SW listeners.

(The code is to show how to generate the same waveform in each channel but in antiphase, as bridge output. The RF Attenuator is just a byproduct...)

The circuit has an insertion loss of about 10dB at full gain but that doesn't matter as it IS an attenuator after all.

It is another learning tool for kids to build and code for themselves.

The only common user I/O on desktops, netbooks, laptops and current MacBooks is/are the Audio Mic and Ear sockets...

This goes for "mobiles" too...

The circuit inside the code is so easy a 10 year old could have a working unit inisde 2 hours to experiment with...

PyAudio IS needed for this to work and although originally designed around a MacBook Pro 13 inch OSX 10.7.5 and Python 2.6.7 has shown itself to be near platform independent...

Read the code for much more information...

Enjoy finding simple solutions to often very difficult problems... ;o)

Bazza, G0LCU...

A DEMO To Show How To Expand A Standard Python Terminal On The Fly... (Python)

2012-12-17T12:47:14-08:00

Python recipe 578383 by Barry Walker (apple, campimeter, demo, linux, macbook_pro, size, terminal, window).

This code shows how to open up a default Terminal running Python to tha maximum allowed on the _desktop_. I decided on writing code to do a crude emulation of a Campimeter. Anyone who has worn spectacles for a long time has had this test done at the optician's. Originally written for a Macbook Pro, OSX 10.7.5 but also tested on Debian Linux 6.0.x. READ the code for more information!!! This code WILL alter the size of the Terminal window AND changes the colours too, although it is very easy to return back to the default state it is NOT included in the code... I EXPECT professionals to know how to doo that.

Before running Python inside the Terminal ensure the Terminal window is at the uppermost left hand corner of your desktop...

I needed the maximised Python Terminal for something else but this was the easiest way to demonstrate ho to do it through Python...

Written so that kids can understand what is going on...

Enjoy finding simple solutions to often very difficult problems... ;o)

Bazza, G0LCU...

A Shell, Binary To Hexadecimal To Decimal Demo... (Bash)

2013-01-11T18:31:03-08:00

Bash recipe 578413 by Barry Walker (apple, bash, binary, decimal, demo, hexadecimal, linux, macbook_pro, shell, terminal).

This little DEMO may be common knowledge to the big guns but not to amateurs like myself, so......

This is an Apple Macbbok Shell/Terminal DEMO shell script to show how to:-

1) Create a binary file... 2) Save it to your DEFAULT /directory/drwawer/folder/... 3) Display a hexadecimal dump of said binary file to prove that it is binary... 4) Select a single BYTE of that file and save it as an ASCII text decimal _number_, also to your DEFAULT /directory/drawer/folder/... 5) Read this ASCII text decimal number back in again... 6) Add this string representation to a number... 7) Stop...

It was intended purely for OSX 10.7.5 and above using the default terminal and shell...

It does work on many Linux flavours and shells/terminals also however.

Written so the anyone can understand what is going on.

The two files generated and saved in this DEMO to your DEFAULT /directory/drawer/folder/ are:-

BinaryString.dat BinaryString.txt

This WILL lead to something very unusual in the not too distant future...

This is Public Domain and you may do with it as you wish...

Enjoy finding simple solutions to often very difficult problems...

Bazza, G0LCU...

A DEMO 6 Bit At A Glance Colouerd Bargraph Generator. (Bash)

2013-01-16T12:26:55-08:00

Bash recipe 578391 by Barry Walker (analogue, anim, apple, bargraph, bash, beep, color, colour, demo, display, generator, linux, macbook_pro). Revision 2.

This code generates a horizontal coloured real time bargraph generator anim for a Macbook Pro 13 inch, OSX 10.7.5, using the default standard Terminal only.

It is UNTESTED on Linux variants but I would like any successful Linux tryers to make a comment in the comments section and tags will be added accordingly otherwise I will assume it does NOT work on other UNIX like variants.

It is a derivative of my 7 bit bargraph generator for Python on this site elsewhere.

The Terminal colours WILL be changed on running but it is simple to return it back to its original state.

Read the code for more information.

Enjoy, (and a Happy New Year)...

Bazza, G0LCU...

Platform Independent White Noise Generator... (Python)

2012-11-25T10:10:45-08:00

Python recipe 578350 by Barry Walker (apple, audio, demo, generator, linux, macbook_pro, noise, program, pyaudio, signal, sound, source, windows).

This code is a derivative of the Pure Sinewave Generator and produces a continuous noise out of the speakers or headphone sockets.

It is for the hobbyist to be able to generate a pseudo-random noise signal for testing with.

It is issued as Public Domian and you may do with it as you please.

It is very easy to convert to Python 3.x.x but as OSX only has 2.7.x and lower ATM then these are what are used...

An installation of pyaudio IS needed for this to work; see the code for more information.

It is near platform independent but sadly the AMIGA is not included, but hey, I have already shown how generate sound for Classic AMIGAs.

Enjoy finding simple solutions to often very difficult problems...

Bazza, G0LCU...

Platform Independent 1KHz Pure Audio Sinewave Generator... (Python)

2012-10-23T12:53:37-07:00

Python recipe 578301 by Barry Walker (apple, audio, demo, generator, linux, macbook_pro, program, pyaudio, signal, sinewave, sound, source, windows). Revision 2.

IKHz_SW_OSX.py

A mono _pure_ sinewave generator using standard text mode Python 2.6.7 to at least 2.7.3.

This DEMO kids level 1KHz generator is mainly for a MacBook Pro, (13 inch in my case), OSX 10.7.5 and above. See below...

It is another simple piece of testgear for the young amateur electronics enthusiast and uses pyaudio fully installed for it to work.

PyAudio can be obtained from here:- http://people.csail.mit.edu/hubert/pyaudio/

This was primarily for a MacBook Pro, but works on at least 2 Linux flavours and Windows Vista 32 bit...

The sinewave generated is near excellent...

Enjoy finding simple solutions to often very difficult problems... Bazza, G0LCU...

For MacBook_Pro-Heads Only. Simple LF Audio Oscilloscope Using Standard Text Mode Python. (Python)

2012-10-07T14:15:55-07:00

Python recipe 578282 by Barry Walker (anim, apple, audio, demo, display, macbook_pro, oscilloscope, pyaudio, scope, sound).

For MacBook_Pro-Heads Only. Simple LF Audio Oscilloscope Using Standard Text Mode Python.

SimpleScope_OSX.py

Do you remember this upload from myself on 26-06-2011...

http://code.activestate.com/recipes/577771-simple-lf-audio-oscilloscope-using-standard-text-m/?in=user-4177147

Well here is an August 2012 vintage MacBook Pro 13 inch version of it for OSX 10.7.5...

This is proof of concept code for a kids level project I am doing for a MacBook Pro, 13 inch, OSX 10.7.5. A DEMO to show how to display a waveform using standard text mode Python. "pyaudio" must be installed for this to work. Levels are set using the standard audio mixers, (System Preferences -> Sound).

Just whistle a signal of say 300Hz to 3KHz, (normal voice spectrum), using say, the internal mic, and watch a waveform appear inside the X-Y graticule.

Read the code for more information.

This code is GPL2, but, the hardware information is Public Domain.

(I am looking into including Windows and Linux variants too using pyaudio to access the sound system.)

Enjoy finding simple solutions to often very difficult problems.

Bazza, G0LCU...

Flash_N_Fade Using Standard Text Mode Python For Linux And Windows... (Python)

2012-07-15T18:38:43-07:00

Python recipe 578216 by Barry Walker (audio, demo, fade, flash, linux, sound, windows).

This DEMO shows how to fade text in shades of grey and also flash with inverse_flash along with simultaneous differing frequency beeps.

There are 2 code snippets that WILL need to be separated before use. One is a Linux version and the other a Windows 32 bit version. There is an AMIGA version but that is for much later.

There are NO notes inside the code so you will have to see the code as to how it works. It is SOOO simple that notes are/were unnecessary...

Bazza, G0LCU...

Metronome For Beginner Musicians... (Python)

2012-05-18T19:30:04-07:00

Python recipe 578139 by Barry Walker (audio, demo, linux, metronome, music_accessory, sound). Revision 2.

This DEMO code is a simple metronome for the Linux platform. It is for newcomers to playing musical instruments as a timing unit for practicing with.

It is issued as Public Domain and you may do with it as you please...

The device /dev/dsp IS required for this to work. If your machine lacks this then install oss-compat from you distro's repository.

It exploits a flaw in the default /dev/dsp device inside linux...

The part of the code the uses Ctrl-C to exit a loop has a flaw. This is not a bug. I will let the big guns explain what is happening if they want to in the comments section.

Enjoy finding simple solutions to often very difficult pronblems...

Bazza, G0LCU...

Markov Encryption Demonstration 2 (Python)

2012-03-14T17:39:17-07:00

Python recipe 578076 by Stephen Chappell (demo, demonstration, encode, encoding, encrypt, encryption).

This program is meant to act as an example of how to use ME with data that needs to be obfuscated. The functionality provided via the GUI demonstrates both the ability to encrypt and decrypt all text that the UTF-8 encoding can handle. Explanations come later.

Pure Fun For Text Mode Python... (Python)

2012-04-02T21:30:18-07:00

Python recipe 578079 by Barry Walker (apple, demo, display, linux, macbook_pro). Revision 2.

Printing to the screen with a difference. ;oD

Works on almost any version of Python running in a terminal inside Linux.

Markov Encryption Demonstration 1 (Python)

2012-03-16T18:59:06-07:00

Python recipe 578062 by Stephen Chappell (demo, demonstration, encode, encoding, encrypt, encryption).

This is a simple GUI program that shows Markov Encryption at work. It is built to be interactive and has all needed code embedded within itself. This version of ME library is not very efficient and represents an early attempt at developing and easily testing the code. Certain limits are built into the program, and the code is not meant to be robust at this stage. This program is a proof-of-concept design meant to ensure that the work being done was viable for future use and that the encryption process could be carried out both ways, both in encoding plaintext and decoding ciphertext.

Amplitude Modulation - Tremolo, Was:- An Audio/Sound Snippet For Linux... ;o) (Python)

2012-01-21T14:18:28-08:00

Python recipe 578013 by Barry Walker (amplitude, audio, demo, linux, mod, modulation, sound, tremolo). Revision 2.

This IS for the big guns as well as the amatuer...

I am always being told that too many comments inside any code is bad and that professional coders are clever enough to work out what a program does without comments...

So here goes! This snippet of code hits /dev/dsp in Linux and has no comments as to what it does. Make sure that /dev/dsp is available in your Linux install - if not then install oss.compat from your repository.

It needs Python 2.6 minimum, but may well work on a much earlier version

Don't run the code first but have a go at working out what it does and see if you are correct... ;o)

You can email me if you think you are/were correct:- wisecracker_at_tesco.net

Bear in mind I don't think this has ever been done before by hitting the /dev/dsp __directly__.

NOTE:- NO imports are required at all!!!

It runs for about 7 seconds before exiting...

Another BIG PLUS for Linux.

(I have a feeling poeple on here might like this, possibly even vote it up. ;)

Answer now at the bottom of this page...

Enjoy...

Bazza, G0LCU...

Morse Code (Python)

2012-01-12T23:45:12-08:00

Python recipe 578012 by Stephen Chappell (demo, demonstration, example, experiment, morse, morse_code, program, sound). Revision 3.

After seeing another recipe recently that helps people with Morse Code, I was inspired to clean up the following code just a bit to make it worthy for the rest of the world. After being executed, it waits for lines of text to be entered, compiles each one in turn into timing codes, and plays them back with a simple execution

Simple Morse Code Practice Oscillator. (Python)

2012-01-09T22:49:05-08:00

Python recipe 578010 by Barry Walker (audio, code, demo, linux, morse, morse_code, morse_practice_oscillator, sound). Revision 2.

This is not for the big guns, but for the Amateur coder AND radio enthusiast.

It is a DEMO Morse Code Practice Oscillator that will allow the user to practice sending Morse code using the "o" and "p" keys as a PSEUDO-paddle key. It is set to around 8 WPM, (Words Per Minute). The code allows "O" and "P" to be used at around 12 WPM, when "Caps Lock" is turned on. Read the code for more informtion.

It is for at least standard text mode Python 2.5.2 to 2.7.2 using PCLinuxOS 2009 and Debian 6.0.0. It may well work at a much earlier version. I do have a version for Python 3.x.x but that will be uploaded elsewhere.

It is written in such a way that youngsters can understand what is going on.

Enjoy finding simple solutions to often very difficult problems... ;o)

Bazza, G0LCU...

Simple Morse Code Generator And Tutor. (Python)

2012-01-09T22:51:12-08:00

Python recipe 578009 by Barry Walker (audio, code, demo, generator, linux, morse, morse_code, sound). Revision 2.

This is not for the big guns, but for the Amateur coder AND radio enthusiast.

It is a DEMO Morse Code Generator and tutor that will generate the tones required for the original standard letters A to Z and numbers 0 to 9. Puctuation is NOT included but hey it is SOOOO simple to modify the code that I will let you, (the ones interested), do that for yourselves... ;o) Read the code for more informaton.

As it stands it _sends_ at around 8 WPM, (Words Per Minute).

It is written in such a way that youngsters can understand what is going on.

Enjoy finding simple solutions to often very difficult problems... ;o)

Bazza, G0LCU...