A MarketPlace of Ideas – Page 206 – Useful Thoughts and Actions Taken

Linux

Fix: Ubuntu Linux Boots to Memtest86 repeatedly

I was unable to complete the fix. I suspect it will return so I am storing my research links here.

How do you stop memtest turns out my hard drive was knocked out of grub somehow.
LinuxLive USB creator – I believe this is for work on a windows machine. Did not help
Fix system only boots into memtest after install Ubuntu 9.10(Karmic)
TROUBLESHOOTING: If system boots only into memtest… (Karmic Installation)
Thread: Can only boot to memtest
Thread: HOWTO: Purge and Reinstall Grub 2 from the Live CD
Boot-Repair
How to fix boot manager in ubuntu

By Fudgy McFarlen, 13 yearsMay 19, 2013 ago

QUCS Build Notes: With Qt4 Library Version

https://www.amarketplaceofideas.com/qucs-build-notes.htm

The general idea with GNU Build system is to

./configure
make
make install

Clean Restart: At this point I had a system issue and decided to reload linux

Package list

sudo apt-get install synaptic
sudo apt-get install  build-essential
sudo apt-get install  flex
sudo apt-get install bison
sudo apt-get install gperf
sudo apt-get install qt4-dev-tools
sudo apt-get install autoconf
sudo apt-get install libtool
sudo apt-get install libxml2-dev

Sequence

Got the latest snapshot of QUCS here

Compile instructions Linux (Ubuntu):
First make sure you have all packages installed:
build-essential flex bison qt4-dev-tools gperf

Install ADMS 2.3.0:
./configure --enable-maintainer-mode
make
sudo make install 
sudo ldconfig

Compile qucs:
cd qucs
./autogen.sh
make
sudo make install


Compile qucs-core:
cd qucs-core
./autogen.sh
make
sudo make install

QUCS 0.0.17 ran at this point

….. more

By Fudgy McFarlen, 13 yearsMay 11, 2013 ago

German

Video: Music: German: Die Arzte: Rebell

……Lyrics

By Fudgy McFarlen, 13 yearsMay 10, 2013 ago

German

Video: Music: Die Arzte: Perfekt

…. lyrics

By Fudgy McFarlen, 13 yearsMay 4, 2013 ago

Electronics

Radiation Sensor made with Arduino

http://www.cooking-hacks.com/index.php/documentation/tutorials/geiger-counter-arduino-radiation-sensor-board

By Fudgy McFarlen, 13 yearsMay 2, 2013 ago

QUCS Example Simulations

Here you can download some schematics to test with Qucs. (Qucs schematic files are plain text files!) All users of Qucs are invited to contribute to these examples. If you want to share a schematic or circuit model do not hesitate to do so.

Simulation examples

DC simulation	bridge.sch	two-dimensional DC sweep
	Mirrors_prj.tar.gz	collection of current mirror schematics using mos and bipolar
	charac.sch	output characteristics of a bipolar transistor
	diff1.sch	large-signal characteristic of a differential amplifier
	fgummel.sch	forward gummel characteristic of a bipolar transistor
	rgummel.sch	reverse gummel characteristic of a bipolar transistor
	preregulator.sch	simple series pre-regulator circuit
AC simulation	swr_meter.sch	circuit of an SWR meter
	gyrator.sch	a primitive gyrator circuit
	resonance.sch	shows voltage overshot of series resonance circuit
	stab.sch	simulates stability of feedback circuit
	active_bp.sch	a simple bandpass filter with OpAmp
	active_lp.sch	active 6th order Chebyshev low-pass filter
	bbv.sch	a BJT broadband amplifier circuit
	singleOPV.sch	subcircuit of an small, internally compensated MOS OpAmp
	gain.sch	simple example for "singleOPV.sch" (needs the circuit above to be run)
	notch.sch	a 50Hz notch filter realized with OpAmp gyrator
	selective_amp.sch	classic selective RF amplifier
	Amp4.zip	audio amplifier provided by John H. Ludwig
	MillerAmp_prj.zip	general purpose amplifier provided by John H. Ludwig
	bjt_noise.zip	simple flicker noise simulation for a BJT provided by Antonio
	1838MHz_PLL_prj.tar.gz	1838MHz PLL modelling including noise provided by M.J. Head
	groupdelay_ac.sch	group delay of a Butterworth filter using AC simulation
	qucs-radiometer-model.tgz	radiometer model provided by Andrea Zonca
Transient simulation	mixer.sch	a double-balanced mixer
	lf_osci.sch	an oscillator for low-frequencies
	rf_osci.sch	a Peltz oscillator
	colpitts.sch	a colpitts oscillator with JFET
	classic_osci.sch	a classic oscillator design
	multiplier.sch	a charge-pumped voltage multiplier
	active_mixer.sch	an active, single-balanced mixer
	gilbert.sch	a gilbert cell mixer
	sym_osci.sch	a symmetrical MOSFET oscillator
	schmitt.sch	a schmitt trigger circuit
	colpitts_base.sch	a colpitts oscillator in common-base circuit
	supply.sch	a conventional power supply
	chargepump.sch	a charge-pump circuit doubling the voltage
	lc_osc.sch	a symmetrical LC CMOS oscillator
	single_balanced.sch	single-balanced CMOS mixer
	Puls3b.sch	fast transient pulse generation
	sawtooth-1.sch	sawtooth generator using simple thyristor, thanks to Oswald
	sawtooth-2.sch	sawtooth generator using opamp integrator, thanks to Oswald
	sawtooth-3.sch	sawtooth generator using flip-flop
	sawtooth-discreet.sch	sawtooth generator using thyristor, thanks to Oswald
	time_resistor.sch	time-dependent variable resistor
	vfile_test_tran.tar.gz	test of file-based voltage source
	fullwaverectifier_1.sch	full-wave rectifier using a transformer and 2 diodes
	fullwaverectifier_2.sch	Gratz bridge rectifier: a full-wave rectifier using 4 diodes
	buckconverter.sch	buck converter (step-down DC-DC converter) circuit
	boostconverter.sch	boost converter (step-up DC-DC converter) circuit
	buckboost.sch	inverting buck/boost converter circuit
S-parameter simulation	elliptic_5th.sch	a 5th order low pass elliptic filter
	chebyshev1_5th.sch	a 5th order low pass Chebyshev type 1 filter
	fhr01fh.sch	small-signal model of a Fujitsu HEMT (including noise analysis)
	giacoletto.sch	modified Giacoletto equivalent circuit
	fet.sch	small-signal model of a high gain FET (subcircuit)
	fet_noise.sch	noise matching of the FET in fet.sch
	microstrip.sch	simple examples how to use microstrip components
	bpf_10Ghz.sch	a microstrip band pass filter created by Toyoyuki Ishikawa
	opamp_gyrator.sch	gyrator with operational amplifier
	wilkinson.sch	an ideal Wilkinson divider
	2StageAmplifier_prj.tar.gz	building a two-stage RF amplifier with stabilization, noise and power matching
	groupdelay_sp.sch	group delay of a Butterworth filter using S-parameter simulation
	SmithChartTest.sch	Smith chart example test with a band pass filter
Digital simulation	DigitalAdder_prj.tar.gz	four-bit adder using one-bit halfadders and fulladders
	flip_flops_models_tran_prj.zip	collection of flip-flop models usable for digital as well as transient simulation
	BCD_prj.tar.gz	four-bit synchronous BCD counter
Harmonic balance	diode_hb.sch	very simple diode setup for demonstration purposes only

……more

By Fudgy McFarlen, 13 yearsMay 1, 2013 ago

Computing

PyCircuit – Does Symbolic Circuit Analysis

By Fudgy McFarlen, 13 yearsMay 1, 2013 ago

German

Video: Music: Die Arzte: Der Himmel ist Blau

….more

By Fudgy McFarlen, 13 yearsApril 30, 2013 ago

Software

Importing an existing C++ project into NetBeans IDE

Links: – These are not QT based projects.

Developing Existing Application With the NetBeans C/C++ Development Pack – The Squirrel Shell project
C/C++ Projects Quick Start Tutorial

NetBeans: New Project > C++ project with existing source

At this point I encountered this page: NetBeans with Qt3 I did the project import using the existing SpreadSheet project that I had previously successfully built using command line interface. It successfully built under NetBeans direction. It is important that I built successfully previously as Netbeans used all that was in place as was.