Here you will find information about our antenna tuning device. It is made to be able to adjust a V-Star antenna for frequencies from 1MHz-32MHz. Schematics Galery Description For antenna tuning we experimented with all kinds of publications so far in literature and Internet websites. We tried symmetrical tuning devices for an antenna with a symmetrical… Continue Reading
Here you will find how we make our PCB at home for prototyping and experimenting. We are using photo etching with the Positive 20. Gallery Continue Reading
Here you will find information about our home made PIC16 programmer. We had used it to do all of of the programming in the earlier years. Now days we are using PICkit3 Gallery Continue Reading
Here you will find source code and schematic for controlling LCD based on Hitachi HD44780U with Microchip PIC16 microcontrollers using only 3 I/O ports. To achieve that we use 8-Bit Serial-Input/Parallel-Output Shift Register 74HC164. The I/O ports used for controlling are: Clock Data LCD Enable The Clock and Data ports can be shared with other peripheral devices. The code is designed… Continue Reading
Here we have put the diagrams of our devices for measuring frequency, inductance and capacitance. Options Frequency meter v3.1 (2003 – 2007) 1Hz – 1000MHz Frequency meter with functions v2.4 (2004 – 2005) F1: 1Hz – 1000MHz F2: 1Hz – 50MHz F3: 1Hz – 50MHz Frequency and LC meter v1.2 (2005 – 2008) 1Hz –… Continue Reading
Here are pictures of LCD panel in different modes of transceiver with commands description. The functions that we support are easy switching between the main frequencies, tuning of generators, setup of memory channels. Base Functions Shows RX/TX receive or transmit, base frequency, LSB/USB/CW and step (1Hz, 10Hz, 50Hz, 100Hz, 1kHz, 10kHz, 100KHz) Mode for tune,… Continue Reading
Here you will find schematics for our homemade new SSB/CW transceiver. Synthesizer is based on DDS AD9832 from AnalogDevices and controlled with microcontroller PIC16F877 from Microchip. Schematics Continue Reading
In the period 2004-2005 we constructed our new transceiver where its frequency synthesizer is based on DDS AD9832 from AnalogDevices, and a PIC16F877 processor from Microchip for controlling. Sound Quality Sample Galery Description This new project turned out to be much more successful than our old transceiver. The final result was a SSB/CW radio with… Continue Reading
In 2000-2001 we constructed our first transceiver with a frequency synthesizer that is controlled by PIC16F84/88 microprocessor from Microchip. The VCO is based on integral schemes HEF4750V and HEF4751V from Philips. Gallery Description Originally we used a microcontroller to control a VCO synthesizer. There were a lot of challenges with writing the program and testing the… Continue Reading
