The personal website of Scott W Harden

Blog Post Categories

Amateur Radio

2021-03-27 WSPR Code Generatorblazoramateur radioqrss
2020-12-14 Seven Years of QRSS Plusqrssamateur radio
2020-10-03 The New Age of QRSSqrssamateur radio
2016-09-05 VHF Frequency Counter with PC Interfaceamateur radiocircuitpythonold
2011-08-14 High School Students' High Altitude Balloon #2amateur radio
2011-08-14 High Altitude Balloon Transmitter Prototypeamateur radiocircuitold
2011-08-06 Ridiculously Simple AVR AM Radio Transmitteramateur radiocircuitold
2011-08-05 I before E except after Hellschreibermicrocontrollercircuitoldamateur radio
2011-07-11 Frequency Counter Hacked to add USB Functionalityamateur radioqrsscircuitmicrocontrollerold
2011-06-05 Permeability Tuned Oscillator (PTO) Working Nicelycircuitamateur radioold
2011-06-02 Screwy Oscillator Ideacircuitamateur radioold
2011-03-17 QRSS and WSPR Presentation for GARSamateur radioqrss
2011-03-14 $10 Frequency Counter Finished!amateur radiocircuitmicrocontrollerold
2011-03-05 AJ4VD Portable - Spring Break QTHamateur radio
2011-02-20 RF Workshop Launchedcircuitamateur radioold
2011-02-12 Wideband Receiver Works!amateur radiocircuitmicrocontrollerold
2011-02-09 Minimal Radio Project Continues...circuitamateur radioold
2011-02-03 Prototype Radio Receiver Improving Dailyamateur radioold
2011-01-28 Home-Brew Transceiver Taking Shape!circuitmicrocontrolleroldamateur radio
2011-01-16 First Homebrew QSO Ever!amateur radiocircuitold
2011-01-10 40m Junkbox QRP Transmitterqrssamateur radiocircuitold
2009-01-09 RF Circuitry Linkscircuitamateur radio
2010-11-29 My Simple Balcony Antennaamateur radio
2010-11-14 Improved MEPT Enclosureqrssamateur radiocircuit
2010-11-11 Deciphering QR Code from Radio Spectrogramqrssamateur radio
2010-07-14 High Altitude Balloon Transmitterqrssamateur radioold
2010-06-10 QRSS Receiver Works... Barelyamateur radioqrss
2010-06-09 Minimalist Radio Receiverqrssamateur radioold
2010-06-07 New Transmitter, New Spots!qrssamateur radio
2010-06-03 Soup Can MEPTqrssamateur radiocircuitold
2010-05-28 Measuring QRP Radio Output Power with an Oscilloscopeamateur radiocircuitold
2010-05-26 Pushing and Pullingcircuitamateur radioold
2010-03-10 How to Destroy a Radio Operatoramateur radio
2010-02-07 Simple DIY Stealth Apartment Antenna for HFamateur radioold
2010-02-02 Convert Text to CW Morse Code with Linuxamateur radiopythonold
2010-01-30 More Antenna Tinkeringamateur radio
2010-01-01 QRSS and Life in Dental Schoolqrssamateur radio
2009-12-10 HF CW on the Cheapamateur radiocircuitold
2009-06-29 Field Day 2009amateur radio
2009-06-18 pySquelch - Frequency Activity Reports via Pythonamateur radiopythonold
2009-04-30 A Foot in the QRSS Doorqrssmicrocontrolleramateur radioold
2009-04-22 Puxing 777 Radio Headset Schematicamateur radiocircuitold
2009-04-15 Scott is now Licensed! (KJ4LDF)amateur radioqrss
2009-04-01 Post-Defense Day 1oldmicrocontrolleramateur radio
2009-02-07 Cheaply Create Double-Sided QSL Cards in 1 Dayamateur radio

Blazor

2021-03-27 WSPR Code Generatorblazoramateur radioqrss
2021-01-12 Google Charts in Blazorblazorcsharp
2021-01-09 Mystify your Browser with Blazorblazorcsharp
2021-01-08 Boids in your Browser with Blazorblazorcsharp
2021-01-07 Draw Animated Graphics in the Browser with Blazor WebAssemblyblazorcsharp
2021-01-06 Create a new .NET 5 Blazor Projectblazorcsharp
2020-12-29 Display Build Details in Client-Size Blazor Appscsharpblazor

Circuit

2020-10-11 Exploring the Membrane Test with a Voltage-Clamped Neuron Modelsciencecircuit
2020-09-27 ECG Simulator CircuitcircuitdiyECG
2020-09-27 Using MOD Files in LTSpicecircuit
2019-08-03 USB Frequency Countercircuit
2019-07-31 Upgraded Amplifierqrsscircuit
2019-07-26 SMT QRSS Designqrsscircuit
2019-07-21 New QRSS Keyerqrsscircuit
2017-12-19 IoT Festivus Polecircuitmicrocontroller
2017-09-09 Hurricane Hack - DIY LED Candlecircuit
2017-09-02 PS4 Controller Hack - Adding Auto-Runcircuit
2017-08-20 Microcontroller Action Potential Generatorsciencecircuitmicrocontrollerpython
2017-08-12 Action Potential Generator Circuitsciencecircuitmicrocontrollerpython
2017-08-02 TTL Triggered Stimulus Generatorcircuitmicrocontroller
2017-06-28 Controlling Speakers with RADARcircuit
2017-04-29 Precision Pressure Meter Projectmicrocontrollercircuit
2017-02-04 Logging I2C Data with Bus Pirate and Pythonmicrocontrollercircuit
2017-02-02 1 Rotary Encoder, 3 Pins, 6 Inputsmicrocontrollercircuit
2016-09-19 Hacking a Cheap Ammeter / Voltmeter to Provide a Bluetooth PC Interfacecircuit
2016-09-09 Adding ADC to Microcontrollers without ADCcircuitold
2016-09-05 VHF Frequency Counter with PC Interfaceamateur radiocircuitpythonold
2016-08-31 ICS501 Simple Frequency Multipliercircuitold
2016-08-20 Breadboard Line Driver Modulecircuitold
2016-08-08 DIY ECG with 1 op-ampdiyECGpythoncircuit
2016-07-28 Opto-Isolated Laser Controller Buildmicrocontrollercircuitold
2016-07-14 Controlling Bus Pirate with Pythonmicrocontrollercircuitold
2014-02-27 Directly Driving 7-Segment Display with AVR IO Pinscircuitold
2013-06-22 Crystal Oven Testingcircuitold
2013-06-22 Adding USB to a Cheap Frequency Counter (Again)circuit
2012-12-18 My DIY Bench Power Supplycircuit
2012-12-06 Single Wavelength Pulse OximetercircuitdiyECGold
2012-06-14 Multichannel USB Analog Sensor with ATMega48microcontrollercircuitold
2011-08-14 High Altitude Balloon Transmitter Prototypeamateur radiocircuitold
2011-08-06 Ridiculously Simple AVR AM Radio Transmitteramateur radiocircuitold
2011-08-05 I before E except after Hellschreibermicrocontrollercircuitoldamateur radio
2011-07-31 PC/microcontroller “wireless” data transfer (part 2)circuitmicrocontrollerold
2011-07-26 PC/microcontroller "wireless" data transfer (part 1)circuitmicrocontrollerold
2011-07-24 Frequency Counter Gen2microcontrollercircuitold
2011-07-16 DIY State Machinemicrocontrollercircuitold
2011-07-11 Frequency Counter Hacked to add USB Functionalityamateur radioqrsscircuitmicrocontrollerold
2011-07-09 Sound Card Microcontroller/PC Communicationmicrocontrollercircuitold
2011-06-19 Using Timers and Counters to Clock Secondscircuitmicrocontrollerold
2011-06-05 Permeability Tuned Oscillator (PTO) Working Nicelycircuitamateur radioold
2011-06-02 Screwy Oscillator Ideacircuitamateur radioold
2011-03-14 $10 Frequency Counter Finished!amateur radiocircuitmicrocontrollerold
2011-02-20 RF Workshop Launchedcircuitamateur radioold
2011-02-12 Wideband Receiver Works!amateur radiocircuitmicrocontrollerold
2011-02-09 Minimal Radio Project Continues...circuitamateur radioold
2011-02-04 Frequency Counter Working!microcontrollercircuitold
2011-01-28 Home-Brew Transceiver Taking Shape!circuitmicrocontrolleroldamateur radio
2011-01-16 First Homebrew QSO Ever!amateur radiocircuitold
2011-01-10 40m Junkbox QRP Transmitterqrssamateur radiocircuitold
2009-01-09 RF Circuitry Linkscircuitamateur radio
2010-12-28 Full-Auto Rapidfire Mouse Modificationcircuitmicrocontrollerold
2010-11-28 Crystal Oven Experimentscircuitmicrocontrollerold
2010-11-24 Serial Port Multi-Channel Temperature Measurementcircuitmicrocontrollerpythonold
2010-11-14 Improved MEPT Enclosureqrssamateur radiocircuit
2010-08-27 Hacking Together a Crystal Oven Part 2circuitqrssoldmicrocontroller
2010-08-26 Minimalist Crystal Ovencircuitqrssoldmicrocontroller
2010-08-24 Lost Project Revisited on HackADaycircuitold
2010-06-06 QRSS DNAmicrocontrollercircuitqrssold
2010-06-03 Soup Can MEPTqrssamateur radiocircuitold
2010-05-28 Measuring QRP Radio Output Power with an Oscilloscopeamateur radiocircuitold
2010-05-26 Pushing and Pullingcircuitamateur radioold
2010-05-17 Minimal QRSS Transmittercircuitqrssold
2010-04-03 Microcontroller Clocking a Transmitter?qrsscircuit
2009-12-10 HF CW on the Cheapamateur radiocircuitold
2009-06-04 Prime Prototype Constructioncircuitmicrocontroller
2009-05-27 A Prime Ideaoldcircuit
2009-05-14 Simple Case AVR/PC Serial Communication via MAX232microcontrollercircuitold
2009-04-22 Puxing 777 Radio Headset Schematicamateur radiocircuitold

Csharp

2021-10-17 NDepend Status Badgescsharpmaui
2021-10-16 Status Badges with Maui.Graphicscsharpmaui
2021-10-16 MeasureString() with Maui.Graphicscsharpmaui
2021-10-12 Rename Image Files by Capture Date with C#csharp
2021-10-09 Managing Secrets in .NET Console Appscsharp
2021-09-10 Drawing with Maui.Graphicscsharpmaui
2021-08-01 Draw with Maui.Graphics and Skia in a C# Console Applicationcsharpmaui
2021-07-03 C# Microphone Level Monitorcsharp
2021-06-08 Working with 16-bit Images in CSharpcsharp
2021-06-03 Representing Images in Memorycsharp
2021-01-31 Reflection and XML Documentation in C#csharp
2021-01-12 Google Charts in Blazorblazorcsharp
2021-01-09 Mystify your Browser with Blazorblazorcsharp
2021-01-08 Boids in your Browser with Blazorblazorcsharp
2021-01-07 Draw Animated Graphics in the Browser with Blazor WebAssemblyblazorcsharp
2021-01-06 Create a new .NET 5 Blazor Projectblazorcsharp
2020-12-29 Display Build Details in Client-Size Blazor Appscsharpblazor
2019-03-15 Sound Card ECG with AD8232diyECGcsharp
2018-06-03 Bit-Bang FTDI USB-to-Serial Converters to Drive SPI Devicescsharpmicrocontroller

DiyECG

2020-09-27 ECG Simulator CircuitcircuitdiyECG
2019-03-15 Sound Card ECG with AD8232diyECGcsharp
2016-08-08 DIY ECG with 1 op-ampdiyECGpythoncircuit
2013-04-14 Simple DIY ECG + Pulse Oximeter (version 2)diyECGmicrocontrollerold
2012-12-06 Single Wavelength Pulse OximetercircuitdiyECGold
2009-08-14 DIY ECG Machine On The CheapdiyECGold
2009-08-09 Improving ECG ReliabilitydiyECG
2009-02-02 Homemade ECG Machine: Improving DailydiyECG
2009-01-21 Signal Filtering with PythondiyECGpythonold
2009-01-20 DIY ECG ImprovementsdiyECG
2009-01-20 DIY ECG Detected an Irregular HeartbeatdiyECGold
2009-01-16 DIY ECG ProgressdiyECG
2009-01-15 DIY ECG Trial 1diyECGpythonold
2009-01-15 Circuits vs. SoftwarediyECGoldpython
2009-01-14 ECG Success!diyECG
2009-01-14 DIY ECG Attempt 1: FailurediyECG
2009-01-13 DIY ECG?diyECG

Maui

2021-10-17 NDepend Status Badgescsharpmaui
2021-10-16 Status Badges with Maui.Graphicscsharpmaui
2021-10-16 MeasureString() with Maui.Graphicscsharpmaui
2021-09-10 Drawing with Maui.Graphicscsharpmaui
2021-08-01 Draw with Maui.Graphics and Skia in a C# Console Applicationcsharpmaui

Med

2019-04-13 Bone Marrow Transplant Complete!med
2019-03-27 Transplant Daymed
2019-03-26 Last Day of Chemotherapymed
2019-03-15 Proceeding with a Bone Marrow Transplantmed
2019-01-02 Stem Cell Collection Daymed
2018-09-13 Scott Has a New Lookmed
2018-08-29 First Round of Chemotherapymed
2018-08-24 Port Placed Todaymed
2018-08-16 PET CT Reveals Progressionmed
2018-06-06 A Change in Symptomsmed
2012-04-16 First Diagnosismed

Microcontroller

2018-06-03 Bit-Bang FTDI USB-to-Serial Converters to Drive SPI Devicescsharpmicrocontroller
2017-12-19 IoT Festivus Polecircuitmicrocontroller
2017-08-20 Microcontroller Action Potential Generatorsciencecircuitmicrocontrollerpython
2017-08-12 Action Potential Generator Circuitsciencecircuitmicrocontrollerpython
2017-08-02 TTL Triggered Stimulus Generatorcircuitmicrocontroller
2017-04-29 Precision Pressure Meter Projectmicrocontrollercircuit
2017-02-04 Logging I2C Data with Bus Pirate and Pythonmicrocontrollercircuit
2017-02-02 1 Rotary Encoder, 3 Pins, 6 Inputsmicrocontrollercircuit
2016-07-28 Opto-Isolated Laser Controller Buildmicrocontrollercircuitold
2016-07-14 Controlling Bus Pirate with Pythonmicrocontrollercircuitold
2013-06-10 Precision Temperature Measurementmicrocontrollerold
2013-05-19 Wireless Microcontroller / PC Interface for $3.21microcontrolleroldpython
2013-05-07 AVR Programming in 64-bit Windows 7microcontrollerold
2013-04-14 Simple DIY ECG + Pulse Oximeter (version 2)diyECGmicrocontrollerold
2013-01-06 AVR Programming in Linuxmicrocontrollerold
2012-08-18 Geek Spin - ATTiny44 Project Prototypemicrocontrollerold
2012-06-24 Introduction to PIC Programming for AVR usersmicrocontrollerold
2012-06-14 Multichannel USB Analog Sensor with ATMega48microcontrollercircuitold
2011-08-05 I before E except after Hellschreibermicrocontrollercircuitoldamateur radio
2011-07-31 PC/microcontroller “wireless” data transfer (part 2)circuitmicrocontrollerold
2011-07-26 PC/microcontroller "wireless" data transfer (part 1)circuitmicrocontrollerold
2011-07-24 Frequency Counter Gen2microcontrollercircuitold
2011-07-16 DIY State Machinemicrocontrollercircuitold
2011-07-11 Frequency Counter Hacked to add USB Functionalityamateur radioqrsscircuitmicrocontrollerold
2011-07-09 Sound Card Microcontroller/PC Communicationmicrocontrollercircuitold
2011-06-19 Using Timers and Counters to Clock Secondscircuitmicrocontrollerold
2011-03-14 $10 Frequency Counter Finished!amateur radiocircuitmicrocontrollerold
2011-02-12 Wideband Receiver Works!amateur radiocircuitmicrocontrollerold
2011-02-04 Frequency Counter Working!microcontrollercircuitold
2011-01-28 Home-Brew Transceiver Taking Shape!circuitmicrocontrolleroldamateur radio
2010-12-28 Full-Auto Rapidfire Mouse Modificationcircuitmicrocontrollerold
2010-11-28 Crystal Oven Experimentscircuitmicrocontrollerold
2010-11-24 Serial Port Multi-Channel Temperature Measurementcircuitmicrocontrollerpythonold
2010-09-07 Simple method to send data from ANY microcontroller to a serial portmicrocontrollerold
2010-08-27 Hacking Together a Crystal Oven Part 2circuitqrssoldmicrocontroller
2010-08-26 Minimalist Crystal Ovencircuitqrssoldmicrocontroller
2010-06-06 QRSS DNAmicrocontrollercircuitqrssold
2009-07-06 Microcontroller-Powered Prime Number Generatormicrocontroller
2009-07-01 Summer's End is Nearingmicrocontroller
2009-06-04 Prime Prototype Constructioncircuitmicrocontroller
2009-05-30 Prime Number Generator Prototypemicrocontrollerold
2009-05-19 Audio and Video on an ATMega88 Microcontrollermicrocontroller
2009-05-14 Simple Case AVR/PC Serial Communication via MAX232microcontrollercircuitold
2009-04-30 A Foot in the QRSS Doorqrssmicrocontrolleramateur radioold
2009-04-01 Post-Defense Day 1oldmicrocontrolleramateur radio

Old

2016-09-09 Adding ADC to Microcontrollers without ADCcircuitold
2016-09-05 VHF Frequency Counter with PC Interfaceamateur radiocircuitpythonold
2016-08-31 ICS501 Simple Frequency Multipliercircuitold
2016-08-24 TENMA Multimeter Serial Hackpythonold
2016-08-20 Breadboard Line Driver Modulecircuitold
2016-07-31 Python Real-time Audio Frequency Monitorpythonold
2016-07-31 Live Data in PyQt4 with PlotWidgetpythonold
2016-07-30 Live Data in PyQt4 with MatplotlibWidgetpythonold
2016-07-28 Opto-Isolated Laser Controller Buildmicrocontrollercircuitold
2016-07-19 Realtime Audio Visualization in Pythonpythonold
2016-07-14 Controlling Bus Pirate with Pythonmicrocontrollercircuitold
2015-12-23 Festivus Pole Video Gameold
2014-04-19 Epoch Timestamp Hashingpythonold
2014-02-27 Directly Driving 7-Segment Display with AVR IO Pinscircuitold
2013-06-23 Calculate QRSS Transmission Time with Pythonqrsspythonold
2013-06-22 Crystal Oven Testingcircuitold
2013-06-10 Precision Temperature Measurementmicrocontrollerold
2013-06-03 Realtime image pixelmap from Numpy array data in Qtpythonold
2013-05-19 Wireless Microcontroller / PC Interface for $3.21microcontrolleroldpython
2013-05-09 Realtime FFT Audio Visualization with Pythonpythonold
2013-05-08 Realtime Data Plotting in Pythonpythonold
2013-05-07 AVR Programming in 64-bit Windows 7microcontrollerold
2013-04-17 Tenma 72-7750 Multimeter for RF Engineeringold
2013-04-15 Fixing Slow Matplotlib in Python(x,y)pythonold
2013-04-14 Simple DIY ECG + Pulse Oximeter (version 2)diyECGmicrocontrollerold
2013-01-06 AVR Programming in Linuxmicrocontrollerold
2012-12-06 Single Wavelength Pulse OximetercircuitdiyECGold
2012-08-18 Geek Spin - ATTiny44 Project Prototypemicrocontrollerold
2012-06-24 Introduction to PIC Programming for AVR usersmicrocontrollerold
2012-06-14 Multichannel USB Analog Sensor with ATMega48microcontrollercircuitold
2011-08-14 High Altitude Balloon Transmitter Prototypeamateur radiocircuitold
2011-08-06 Ridiculously Simple AVR AM Radio Transmitteramateur radiocircuitold
2011-08-05 I before E except after Hellschreibermicrocontrollercircuitoldamateur radio
2011-07-31 PC/microcontroller “wireless” data transfer (part 2)circuitmicrocontrollerold
2011-07-26 PC/microcontroller "wireless" data transfer (part 1)circuitmicrocontrollerold
2011-07-24 Frequency Counter Gen2microcontrollercircuitold
2011-07-16 DIY State Machinemicrocontrollercircuitold
2011-07-11 Frequency Counter Hacked to add USB Functionalityamateur radioqrsscircuitmicrocontrollerold
2011-07-09 Sound Card Microcontroller/PC Communicationmicrocontrollercircuitold
2011-07-08 Create Mono and Stereo Wave Files with Pythonpythonold
2011-06-19 Using Timers and Counters to Clock Secondscircuitmicrocontrollerold
2011-06-05 Permeability Tuned Oscillator (PTO) Working Nicelycircuitamateur radioold
2011-06-02 Screwy Oscillator Ideacircuitamateur radioold
2011-03-14 $10 Frequency Counter Finished!amateur radiocircuitmicrocontrollerold
2011-02-20 RF Workshop Launchedcircuitamateur radioold
2011-02-12 Wideband Receiver Works!amateur radiocircuitmicrocontrollerold
2011-02-09 Minimal Radio Project Continues...circuitamateur radioold
2011-02-04 Frequency Counter Working!microcontrollercircuitold
2011-02-03 Prototype Radio Receiver Improving Dailyamateur radioold
2011-01-28 Home-Brew Transceiver Taking Shape!circuitmicrocontrolleroldamateur radio
2011-01-16 First Homebrew QSO Ever!amateur radiocircuitold
2011-01-10 40m Junkbox QRP Transmitterqrssamateur radiocircuitold
2010-12-28 Full-Auto Rapidfire Mouse Modificationcircuitmicrocontrollerold
2010-11-28 Crystal Oven Experimentscircuitmicrocontrollerold
2010-11-24 Serial Port Multi-Channel Temperature Measurementcircuitmicrocontrollerpythonold
2010-09-09 Quantifying University Network Frustrationspythonold
2010-09-07 Simple method to send data from ANY microcontroller to a serial portmicrocontrollerold
2010-09-04 VD Labsqrssold
2010-08-27 Hacking Together a Crystal Oven Part 2circuitqrssoldmicrocontroller
2010-08-26 Minimalist Crystal Ovencircuitqrssoldmicrocontroller
2010-08-24 Lost Project Revisited on HackADaycircuitold
2010-08-15 Tooth as a Radio Receiver?old
2010-08-11 Prime Failure 1 Year in the Makingpythonold
2010-08-09 Converting Numbers to Morse Code with GCCpythonqrssold
2010-07-22 Idea: vdFSK modulationpythonqrssold
2010-07-14 High Altitude Balloon Transmitterqrssamateur radioold
2010-06-28 Getting GTK, Glade, and Python to Work in Windowspythonold
2010-06-24 Fast TK Pixelmap generation from 2D Numpy Arrays in Pythonpythonold
2010-06-24 Detrending Data in Python with Numpypythonold
2010-06-23 Insights Into FFTs, Imaginary Numbers, and Accurate Spectrographsqrsspythonold
2010-06-20 Smoothing Window Data Averaging in Python - Moving Triangle Tecniquepythonold
2010-06-19 Simple Python Spectrograph with PyGamepythonold
2010-06-15 Simple-Case PyGame Examplepythonold
2010-06-09 Minimalist Radio Receiverqrssamateur radioold
2010-06-07 QRSS VD Image Assemblerqrssoldpython
2010-06-06 QRSS DNAmicrocontrollercircuitqrssold
2010-06-03 Soup Can MEPTqrssamateur radiocircuitold
2010-05-28 Measuring QRP Radio Output Power with an Oscilloscopeamateur radiocircuitold
2010-05-27 AJ4VD Gator Spotted in MAqrssold
2010-05-26 Pushing and Pullingcircuitamateur radioold
2010-05-22 Debut of the AJ4VD QRSS Gatorqrssold
2010-05-19 Debut of the AJ4VD QRSS Fishpythonqrssold
2010-05-17 Minimal QRSS Transmittercircuitqrssold
2010-05-10 Generate LUTs with Pythonpythonold
2010-03-09 Overseas QRP Transmissionqrsspythonold
2010-03-07 Dynamic Logo Generation with Pythonpythonold
2010-03-05 Smoothly Scroll an Image Across a Window with Tkinter vs. PyGamepythonold
2010-03-05 Realtime FFT Graph of Audio WAV File or Microphone Input with Python, Scipy, and WCKgraphpythonold
2010-03-05 Animated Realtime Spectrograph with Scrolling Waterfall Display in Pythonpythonold
2010-03-03 Display large Images with Scrollbars with Python, Tk, and PILpythonold
2010-02-07 Simple DIY Stealth Apartment Antenna for HFamateur radioold
2010-02-02 Convert Text to CW Morse Code with Linuxamateur radiopythonold
2009-12-10 HF CW on the Cheapamateur radiocircuitold
2009-08-14 DIY ECG Machine On The CheapdiyECGold
2009-08-04 Generate Apache-Style HTTP Access Logs via SQL and PHPold
2009-07-26 PySquelch: A Python-Based Frequency Audio Activity Monitorpythonold
2009-06-19 Reading PCM Audio with Pythonpythonold
2009-06-18 pySquelch - Frequency Activity Reports via Pythonamateur radiopythonold
2009-05-30 Prime Number Generator Prototypemicrocontrollerold
2009-05-27 A Prime Ideaoldcircuit
2009-05-20 Graphing Computer Usagepythonold
2009-05-15 Removing Textile Markup From Wordpress Entriesold
2009-05-14 Simple Case AVR/PC Serial Communication via MAX232microcontrollercircuitold
2009-04-30 A Foot in the QRSS Doorqrssmicrocontrolleramateur radioold
2009-04-22 Puxing 777 Radio Headset Schematicamateur radiocircuitold
2009-04-09 Custom HDD LEDsold
2009-04-01 Post-Defense Day 1oldmicrocontrolleramateur radio
2009-01-29 Analyzing my Writings with Pythonpythonold
2009-01-21 Signal Filtering with PythondiyECGpythonold
2009-01-20 DIY ECG Detected an Irregular HeartbeatdiyECGold
2009-01-15 DIY ECG Trial 1diyECGpythonold
2009-01-15 Circuits vs. SoftwarediyECGoldpython
2008-11-24 Compress and Store Files in Pythonpythonold
2008-11-17 Linear Data Smoothing in Pythonoldpython
2005-08-12 Custom MiniDisc Labels with Photoshopold

Php

2021-01-28 Get URL of a Directory with PHPphp
2020-09-13 Leaving WordPressphp

Python

2021-05-16 Deploy a Website with Python and FTPSpython
2021-05-15 Managing Credentials with Pythonpython
2020-09-24 Exponential Fit with Pythonpython
2020-09-23 Signal Filtering in Pythonpython
2017-08-20 Microcontroller Action Potential Generatorsciencecircuitmicrocontrollerpython
2017-08-12 Action Potential Generator Circuitsciencecircuitmicrocontrollerpython
2016-09-05 VHF Frequency Counter with PC Interfaceamateur radiocircuitpythonold
2016-08-24 TENMA Multimeter Serial Hackpythonold
2016-08-08 DIY ECG with 1 op-ampdiyECGpythoncircuit
2016-07-31 Python Real-time Audio Frequency Monitorpythonold
2016-07-31 Live Data in PyQt4 with PlotWidgetpythonold
2016-07-30 Live Data in PyQt4 with MatplotlibWidgetpythonold
2016-07-19 Realtime Audio Visualization in Pythonpythonold
2014-04-19 Epoch Timestamp Hashingpythonold
2013-06-23 Calculate QRSS Transmission Time with Pythonqrsspythonold
2013-06-03 Realtime image pixelmap from Numpy array data in Qtpythonold
2013-05-19 Wireless Microcontroller / PC Interface for $3.21microcontrolleroldpython
2013-05-09 Realtime FFT Audio Visualization with Pythonpythonold
2013-05-08 Realtime Data Plotting in Pythonpythonold
2013-04-15 Fixing Slow Matplotlib in Python(x,y)pythonold
2011-07-08 Create Mono and Stereo Wave Files with Pythonpythonold
2010-11-24 Serial Port Multi-Channel Temperature Measurementcircuitmicrocontrollerpythonold
2010-09-09 Quantifying University Network Frustrationspythonold
2010-08-11 Prime Failure 1 Year in the Makingpythonold
2010-08-09 Converting Numbers to Morse Code with GCCpythonqrssold
2010-07-22 Idea: vdFSK modulationpythonqrssold
2010-06-28 Getting GTK, Glade, and Python to Work in Windowspythonold
2010-06-24 Fast TK Pixelmap generation from 2D Numpy Arrays in Pythonpythonold
2010-06-24 Detrending Data in Python with Numpypythonold
2010-06-23 Insights Into FFTs, Imaginary Numbers, and Accurate Spectrographsqrsspythonold
2010-06-20 Smoothing Window Data Averaging in Python - Moving Triangle Tecniquepythonold
2010-06-19 Simple Python Spectrograph with PyGamepythonold
2010-06-15 Simple-Case PyGame Examplepythonold
2010-06-07 QRSS VD Image Assemblerqrssoldpython
2010-05-19 Debut of the AJ4VD QRSS Fishpythonqrssold
2010-05-10 Generate LUTs with Pythonpythonold
2010-03-09 Overseas QRP Transmissionqrsspythonold
2010-03-07 Dynamic Logo Generation with Pythonpythonold
2010-03-05 Smoothly Scroll an Image Across a Window with Tkinter vs. PyGamepythonold
2010-03-05 Realtime FFT Graph of Audio WAV File or Microphone Input with Python, Scipy, and WCKgraphpythonold
2010-03-05 Animated Realtime Spectrograph with Scrolling Waterfall Display in Pythonpythonold
2010-03-03 Display large Images with Scrollbars with Python, Tk, and PILpythonold
2010-02-02 Convert Text to CW Morse Code with Linuxamateur radiopythonold
2009-07-26 PySquelch: A Python-Based Frequency Audio Activity Monitorpythonold
2009-06-19 Reading PCM Audio with Pythonpythonold
2009-06-18 pySquelch - Frequency Activity Reports via Pythonamateur radiopythonold
2009-05-20 Graphing Computer Usagepythonold
2009-01-29 Analyzing my Writings with Pythonpythonold
2009-01-21 Signal Filtering with PythondiyECGpythonold
2009-01-15 DIY ECG Trial 1diyECGpythonold
2009-01-15 Circuits vs. SoftwarediyECGoldpython
2008-11-24 Compress and Store Files in Pythonpythonold
2008-11-17 Linear Data Smoothing in Pythonoldpython

Qrss

2021-03-27 WSPR Code Generatorblazoramateur radioqrss
2020-12-14 Seven Years of QRSS Plusqrssamateur radio
2020-10-03 The New Age of QRSSqrssamateur radio
2019-07-31 Upgraded Amplifierqrsscircuit
2019-07-29 SMT QRSS Spotsqrss
2019-07-26 SMT QRSS Designqrsscircuit
2019-07-21 New QRSS Keyerqrsscircuit
2019-07-20 QRSS Stitch and Stackqrss
2019-07-20 Started Transmitting Lettersqrss
2019-07-18 OOK and FSKqrss
2019-07-14 Amplifier Improvementsqrss
2019-07-13 QRSS Spotsqrss
2013-06-23 Calculate QRSS Transmission Time with Pythonqrsspythonold
2011-07-11 Frequency Counter Hacked to add USB Functionalityamateur radioqrsscircuitmicrocontrollerold
2011-03-17 QRSS and WSPR Presentation for GARSamateur radioqrss
2011-03-14 6 Day QRSS Stitchqrss
2011-01-10 40m Junkbox QRP Transmitterqrssamateur radiocircuitold
2010-11-14 Improved MEPT Enclosureqrssamateur radiocircuit
2010-11-11 Deciphering QR Code from Radio Spectrogramqrssamateur radio
2010-09-04 VD Labsqrssold
2010-08-27 Hacking Together a Crystal Oven Part 2circuitqrssoldmicrocontroller
2010-08-26 Minimalist Crystal Ovencircuitqrssoldmicrocontroller
2010-08-09 Converting Numbers to Morse Code with GCCpythonqrssold
2010-07-22 Idea: vdFSK modulationpythonqrssold
2010-07-14 High Altitude Balloon Transmitterqrssamateur radioold
2010-07-12 Coder's Blockqrss
2010-06-23 Insights Into FFTs, Imaginary Numbers, and Accurate Spectrographsqrsspythonold
2010-06-12 MEPT Insulation Improves Stabilityqrss
2010-06-10 QRSS Receiver Works... Barelyamateur radioqrss
2010-06-09 Minimalist Radio Receiverqrssamateur radioold
2010-06-07 QRSS VD Image Assemblerqrssoldpython
2010-06-07 New Transmitter, New Spots!qrssamateur radio
2010-06-06 QRSS DNAmicrocontrollercircuitqrssold
2010-06-03 Soup Can MEPTqrssamateur radiocircuitold
2010-05-28 AJ4VD Gator Spotted in Essex, Englandqrss
2010-05-27 AJ4VD Gator Spotted in MAqrssold
2010-05-27 AJ4VD Gator Chomps its way into Belgium!qrss
2010-05-24 Solar Powered QRSS Transmitterqrss
2010-05-22 First QRSS Spot!qrss
2010-05-22 Debut of the AJ4VD QRSS Gatorqrssold
2010-05-19 Debut of the AJ4VD QRSS Fishpythonqrssold
2010-05-17 Minimal QRSS Transmittercircuitqrssold
2010-04-03 Microcontroller Clocking a Transmitter?qrsscircuit
2010-03-16 W4DFU Gator Seen in Canadaqrss
2010-03-12 QRSS VD version 1.04 Releasedqrss
2010-03-09 Overseas QRP Transmissionqrsspythonold
2010-03-06 Spring Break Software Projectqrss
2010-01-01 QRSS and Life in Dental Schoolqrssamateur radio
2009-04-30 A Foot in the QRSS Doorqrssmicrocontrolleramateur radioold
2009-04-15 Scott is now Licensed! (KJ4LDF)amateur radioqrss

Science

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