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Oregon Coast Repeater Group |
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The following design files are made available to keep your soldering iron and workbench seat
from growing cold.
Miscellaneous Functions |
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The following links and files contain information for miscellaneous functions. |
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Watchdog Power Cycler |
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The WDPC - Watchdog Power Cycler is an activity monitor for remote sites. Upon the loss of a heartbeat signal, the WDPC will produce a power down/power up cycle and wait for the remote equipment to reboot and then again start looking for the "I'm Alive" heartbeat signal. If the signal is again not present the power cycle will be repeated until the "I'm Alive" heartbeat returns. |
| WDPC.zip |
Design files for the Watchdog Power Cycler. Includes schematics, micro-controller firmware source code, firmware hex image file, and implemenation photos and mechanical details. |
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Packet Radio Telemetry |
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The following links and files contain information for packet radio telemetry. |
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KPC Telemetry |
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Sending remote site telemetry data using the KPC TNC. |
| KPC_Telemetry.zip |
Design files for a KPC TNC Telemetry Adapter and Monitored Voltage Signal Attenuator. Includes schematics, PCB layout, and implemenation photos. |
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Radios |
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The following links and files contain upgrades/fixes for various radios. |
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Yaesu FT-301D Replacement Display Yaesu FT-301D Replacement Display Document |
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The Yaesu FT-301D transceiver's digital readout display used TIL-306 and TIL-308 LED display devices that have long gone obsolete. Those display devices ran hotter than blazes and frequently failed due to a lack of cooling. This paper and accompanying files (see below) contain the documentation and implementation for a new, directly plug in compatible, digital display for the Yaesu FT-301D transceiver. |
| FT301D_Replacement_Display.zip |
Design files for the FT-301D replacement digital display. Includes schematics, PCB layout files, Gerber files, micro-controller firmware source and hex image files, along with schematic and PCB layout CAD libraries. |
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Radio Accessories |
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The following links and files contain design and construction information for various radio accessories. |
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DigiVFO/DigiBrain Upgrade DigiVFO/DigiBrain Upgrade Document |
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An upgrade for the DigiVFO/DigiBrain. This Direct Digital Synthesis VFO was initially described in the May 1995 and March 1996 QST magazine. This upgrade adds features and useful capabilities to the original design. The upgraded unit can easily be user set for compatibility with many different radios and/or used on the workbench as a signal generator. |
| DigiVFO_DigiBrain_Upgrade.zip |
Design files for the DigiVFO/DigiBrain upgrade. Includes schematics, micro-controller firmware source code, firmware hex image file, and implemenation photos and mechanical details. |
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| DigiVFO_DigiBrain_Firmware_20110630.zip |
The latest firmware update for the "upgraded" DigiVFO/DigiBrain. This firmware source code features compiler switches to set "up" or "down" rotation of the step sequencing and the use of either the original Varitronics MDL-16265K-LV or the newer Lumex LCM-S01602DSF/A display (Digi-Key P/N 67-1758-ND) which uses the Samsung S6A0069 controller and also has an LED backlight. Also included are some improvements related to updating of the display when doing "mode changes" from VFO to Signal Generator and visa-versa. |
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Dual Radio Sound Port Interface |
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A dual radio interface to a PC sound port. |
| RASPY.zip |
Design files for the RASPY - Radio and Sound Port Yoke. Includes schematics and implemenation photos and mechanical details. |
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CW Voltmeter |
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The CWVM is a low voltage CW voltmeter for the visually impaired/blind, and, is actually useful for sighted individuals wanting to hear a voltage reading instead of having to look at a display. The CW voltmeter operates from a +7VDC to +25VDC power source (9V battery or even the actual voltage source being monitored) and measures voltage levels from 0.00VDC to +25.50VDC. Pushing and holding the power button results in a Morse code voltage report similar to: "13.80V" followed by a two second delay. The report repeats, with a new A/D sample each time, as long as the button is pushed. Morse code sending speed is potentiometer adjustable from 5WPM to 45WPM. |
| CWVM.zip |
Design files for the CWVM - CW Voltmeter. Includes schematics, PCB layout, firmware source and hex image files, and implemenation photos. |
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Repeater Audio Graphic Equalizer |
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A Repeater Audio Graphic Equalizer small enough to put inside almost any radio. This circuit provides individually adjustable audio levels in three different audio frequency bands to improve the readability of a radio's transmitted audio. |
| RAGE.zip |
Design files for the RAGE - Repeater Audio Graphic Equalizer. Includes schematics, PCB layout, and implemenation photos. |
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Test Equipment |
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The following links and files contain information for test equipment you can build. |
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Impedance Meter - USB |
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A surface mount implementation of Alfredo Accattatis' Visual Analyzer ZRLC Meter. This is one of the "coolest" pieces of test equipment that you could ever build. This relatively simple USB Sound Card Instrument is amazingly accurate and provides a wealth of information for those capacitors, inductors, resistors and other odds and ends in your parts bin or junk box. It will help you design and build accurate working circuits! The Visual Analyzer software is free and is available from Alfredo Accattatis' excellent website: Visual Analyzer Software |
| VA_Zmeter_REV_A02.zip |
Design files for a surface mount implementation of the popular Visual Analyzer ZRLC Meter. Includes schematics, PCB layout and implemenation photos and details. |
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Oscilloscope - USB |
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A surface mount implementation of the Visual Analyzer Oscilloscope/Spectrum Analyzer/Signal Generator. This is an audio frequency range piece of test equipment. While it only covers the audio frequency range (up to 48KHz; 96KHz sample rate), this instrument provides a wealth of information about the quality of audio signals. Along with being a dual channel oscilloscope, it also provides a dual channel spectrum analyzer and dual signal generators that are capable of producing a wide range of signals from sine waves, square waves, triangular waves, pulses, even custom waveforms, etc. Here is another screen shot of the Visual Analyzer in action. The Visual Analyzer software is free and available from Alfredo Accattatis' excellent website: Visual Analyzer Software |
| VA_Oscope_Rev_A01.zip |
Design files for a surface mount implementation of the popular Visual Analyzer Oscilloscope/Spectrum Analyzer/Signal Generator. Includes schematics, PCB layout and implemenation photos and details. |
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Workbench - Techniques and Methods |
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OCRG has been using circuit board fabrication products from "Pulsar" to produce many of our system unique circuit boards. These circuit boards range from simple one-sided attenuator boards for our A/D conversion telemetry to two layer fine pitch SMT boards with dual CPUs for processing our weather station data. Pulsar's website contains excellent information on fabricating PCBs using The "DirectEtch" Technique with their complete PCB "Fab-in-a-Box" products. | |
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Technology and techniques for making printed circuit boards using a laser printer toner transfer methodology. |
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