OwenDuffy.net
VK1OD Theme page: Hardware
Modules
Other
Modules
Roger Beep
Roger Beep - tone waveform development
Roger Beep - SM8 installation notes
An experimental CPLD based PLL
Icom - 9350 Protocol Converter (ic9350)
12V DC distribution in car for radio applications - 2005
Peak amplifier for an RF wattmeter
Peak amplifier for Drake W4 directional wattmeter
Heater Delay Timer
EA 1978 Accu-keyer improvements
Coax Relay Driver
Passive DI box
Sound card microphone preamplifier
TuneMate for Icom transceivers
PIK - PIC Iambic Keyer
Radio Programming Interface
TNC Audio Break-Out-Box
Echolink interface unit
High Pass speaker filter for CTCSS suppression
GPIB to Centronics Protocol Converter
VK1CAE Experimental FlexDigi Node
Silicon Chip Automotive Ammeter (June 2002) - mods
An RF choke for a telephone line
Modem reset mod
Serious hazard of common 6 pin DC power connector on ham transceivers
Anderson Power Poles for 12VDC radio applications
Fitting a HAPN 4800 board to a Paccomm Tiny 2 Mk II
Flash TNC
VKPowermate II
AH4-AT300 Protocol Converter
*** coding in progress, but waiting on time ***
Heater Delay Timer
1kHz reference oscillator
137.7kHz oscillator
137.7kHz QRSS on one chip
440Hz (A4, A440) reference oscillator
MCU to load PLL configuration registers
N0XAS ID-O-Matic - VK1OD implementation
PllLdr application - AD9850
PllLdr application - AD9850/51 300Bd FSK
DTR / RTS interface unit
Simple Morse beacon keyer
Improving weak signal identification of FSK beacons
Thunderbolt GPS Disciplined Oscillator - VK1OD implementation
PllLdr application - BH1415F
Anatek ESR Meter - VK1OD implementation
QRP QRSS Beacon Transmitter
RF current sampler
Another simple Morse beacon keyer - basic, but accurate
Simple Morse beacon keyer - using ATB
AVR ATTiny programming adapter
Prolific PL-2303 problems
RS232 Morse keyer
Simple Morse beacon keyer - EEPROM data structure
PllLdr - EEPROM data structure
GPS PPS Utility (gpsppsu)
Fan controller for Manson EP-613 / Jaytech MP-3082 with fan
Hand wound power transformers
Another Morse beacon keyer - A/B RF switching
Morse beacon keyer for a cluster of transmitters
Thinking aloud on the VK3XDK 10GHz transverter receiver performance
Arduino thermometer - a tutorial
Generic heating / cooling controller
Power Amplifier Run On Timer (PAROT)
Peak amplifier for Bird 43 coupler directional wattmeter by F6DFZ
Arduino Real Time Clock - a tutorial
Arduino Magnetometer - a tutorial
WiFi relay controller (ESP8266, ESP32)
Other
QRP2000 Synthesiser
Portable generator sets and RCD protection for Amateur Radio field stations
PA0KLT Si570 Synthesiser - VK1OD implementation
A medium priced generator set from eBay
Jaycar MI5104 inverter
Synthesisers and external reference clocks
Manson EP-613 / Jaytech MP-3082 improvement
Lithium polymer batteries for ham radio applications
Compatibility of HRD/DM780 with Digi Portserver TS4
Button cells in digital calipers and the like
Mastech MS6514 review
Acrylic plinth for small card modules
AL80B cooling
FM900 - EPROM for 2m band in the Southern Highlands
Arduino stepper motor driver - a tutorial
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