Projects:
| Last upd:
| Status: |
Adding an I/Q output to the Elecraft KX2
A mini writeup of an ill-conceived little project, adding a homemade option board to the Elecraft KX2 transceiver.
| 2017-02-13 | New - added 2017-02-13 |
Power and SWR Meter - Rev II An update to the original Power and SWR Meter project.
- TFT Graphics and Touch display
- or alternately, a 20x4 LCD, like previous project
| 2020-06-21 | Revision 1.03 of the TFT version. Maintenance update to accommodate changes in the ADC library.
Revision 1.02 of the TFT version. Bugfix, ADC had a kink around 1.67V. Added power level floor settings up to 10 mW
Revision 1.01 of the TFT version. A minor adjustment to keep it compatible with rev 1.36 of Teensyduino (updated ADC library)
Detailed instructions added for compilation of source code. Also added some info and pictures describing a slightly improved version of the Tandem Match Coupler and AD8307 bridge.
Revision 1.00 of the TFT version. Floor function added for the displayed power level, user settable at 1mW, 0.01mW, 1uW or no floor.
Revision 0.99 of the TFT version. Bugfix of Reverse Calibration feature.
Revision 0.98 of the TFT version. Added features
Revision 0.98 of the LCD version. Encoder bugfix
Revision 0.96 of the TFT version. Minor cleanup
Revision 0.97 of the LCD version. Minor cleanup
Revision 0.96 of the LCD version. Fixes a pin assignment discrepancy for the Enact switch.
2016-09-05 Firmware version 0.95 uploaded, some minor improvements.
Project added 2016-06-12 |
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Machine recognition of hand-sent morse code
Two easy to build microcontroller projects.
| 2016-03-20 | New - added 2016-03-20 |
To automatically tune a Magnetic Loop Antenna
| 2020-06-21
| Latest updates:
Firmware version 4.10.
- Maintenance update to accommodate changes in HardwareSerial and ADC library.
Firmware version 4.09.
- Bugfix for DRV8825 / A4988 stepper motor driver option. Had glitches when switching between full and fractional step modes.
New "BOM and Building Instructions" added for Rev3 / Rev4 printed circuit boards, which utilize the DRV8825 or A4988 Stepper Drivers
Firmware version 4.08.
- Update to stay compatible with latest version of Arduino/Teensyduino.
- Added two transceivers, Yaesu FT920 and Kenwood TS870 (neither has been tested yet)
Firmware version 4.05:
- Added SWR Alarm output signal on pin/pad 33.
- Backlash Compensation Select function changed to Backlash Compensation Adjust with an user (Menu) adjustable range of 0-400 steps
- Bugfix: Some displays garbled when using the precompiled hex files with version 4.04
- Bugfix: Endstop Option 2 had bugged logic around handling of upper endstop signal
Firmware version 4.04:- Pushbutton function rewritten, now no false readings.
- Kenwood TS2000 "TX;" issue addressed.
- Improvement for endstop features 2 and 3.
- Switch-in/switch-out capacitor feature improvement.
Updated "Operation Instructions and Notes".
Updated "BOM and Building Instructions" , adding a detailed description of the Dual Antenna Changeover feature.
Firmware version 4.03. Main additions:
- Pushbutton debounce improvement
- Added USB commands for remote tune
- Screensaver disable feature added
- Further LCD handling improvements
- USB commands made case insensitive and ';' added as USB command terminator.
Firmware version 4.01 Improved handling of certain OLED displays.
Firmware version 4.00. Main additions:
- Triple Antenna change-over feature
- Transceiver Profiles and tune power level management
- Yaesu FT-1000 Mk-V, Kenwood TS-440/450
Firmware version 3.07. Added Yaesu FT-990, minor bug fixes.
Firmware version 3.06. Further Kenwood / Flex bug fixes.
Firmware version 3.05. Kenwood / Flex bug fixes.
Firmware version 3.04. ICOM bug fixes.
Firmware version 3.03 - capability to handle 3 additional transceivers added
Project added 2014-04-30
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Power and SWR Meter with dual bargraphs, using 2x AD8307
microwatts to kilowatts, accurate SWR at 1mW.
( see also updated project: Power and SWR Meter - Rev II ) | 2016-05-27
| A new version (rewrite) of the firmware, using the Arduino environment. Arduino sketch, v. 0.90.
Firmware v.0.75, yet another bug fix. Thanks ON6ZG
Firmware v.0.74, another bug fix, courtesy of M0KGV.
Firmware v.0.73, bug fix.
Firmware version 0.71, firmware bug cleanup.
Firmware version 0.70:
12 bit ADC option added.
Some tweaks of USB commands
New and more stable USB-Serial stack
Major rewrite of description.
Project added 2013-09-29 |
Magnetic transmitting loop antenna excercises
Two magnetic transmitting loop antenna projects:
- 0.5 x 0.5m loop using a manual stepper motor controller for tuning
- 1 x 1m loop and an automatic microcontroller based stepper motor controller
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2014-04-30
2013-07-15 |
Automatic Controller and firmware now outdated.
See the more recent project:
To automatically tune a Magnetic Loop Antenna
Rough description of two magloop projects, including a manual and a fully automatic controller for tuning of magnetic loop transmitting antennas.
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A very simple to build, menu driven RF Power Meter, based on the AD8307 log amp
(This project is also described in QEX Magazine, May/June 2013 Edition)
nanowatts to kilowatts, dBm, volts over 50 ohm –
1, 2.5 or 5 second peak envelope power –
average power and amplitude modulation index –
in-line (using a power tap) or terminated metering
|
2014-02-13 |
New firmware uploaded.
V 1.08, modifications/Improvements to USB
serial handling, in sync with the project:
Power and SWR Meter with bargraphs
v 1.07, minor update, better average measurements.
v 1.06 Added USB (virtual serial) commands
Project added 2012-06-27 |
AD8317 based Intelligent Attenuator/Power Meter for 0.2 to 500 MHz
A multipurpose RF lab instrument:
- RF power meter, 0.2 to 500MHz, input power -50 to +30dBm, 0.1dB resolution.
- Step Attenuator, 0 - 151.5dB in 0.5dB steps.
- "Intelligent Attenuator" or "Signal Level Generator" function, automatically adjusting to a preset output power.
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2012-04-13 |
Bugfixes and new features
(Bargraph Power Display)
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SDR Widget
A group project to develop the ideal sound card/controller for an SDR
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2011-04-17 |
A full fledged sound card with superior performance, and Mobo style SDR control functions. HiFi Audio playback variants also developed. Development continues
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Comparison of “conventional”, “DDC based” and “soundcard based” receivers
A rambling mini thesis on SDR performance
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2010-07-28 | |
Mobo 4.3 Application Programming Interface (API)
Here is the Mobo 4.3 Firmware API, as well as the complete AT90USB162 / ATmega32U2 sourcecode for download (see bottom of page).
The MoboControl GUI is available for download at the bottom of this page.
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2017-01-21
2011-04-02 |
Uploaded a new version 1.08 of the firmware source code. The new version can be compiled using Atmel Studio 7.
API and repository for the Mobo 4.3 firmware
Now including the new version 1.07
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Mobo 4.3 Project - The continuing Saga of the SR 6.3 kit - Now becoming a deluxe HF Transceiver
This section includes description of a firmware development project, using the AT90USB162 microcontroller to provide Si570, and TRX control (automatic BPF + LPF switching, PA bias, SWR measurement and protect, etc...)
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2011-04-02 |
Stable.
References to Firmware version 1.07 added |
Softrock 6.3 Project - An all band HF Transceiver, based on the Softrock RXTX v6.3 kit
Including the following home brew projects:
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2011-01-16 |
Stable since 2009-09.
Latest update:
Added a picture from Alex, RN6LW, showing his very nice SDR transceiver, including the ATmega168 controller |
A 4m tall, bottomfed, electrically fullsize halfwave vertical dipole for 20m (tuneable to other bands)
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2009-03-31 |
Stable |