aeonios
20-03-07, 18:17
Για όποιον θέλει να παίξει με τον PIC16F628A
http://www.hamradioindia.org/circuits/images/display01a.jpg
http://www.hamradioindia.org/circuits/dds.php
Range 0 to 70 MHz by 1 Hz step.
Freq setting in 1, 10, 100Hz, 1, 10, 100KHz, 1, 10 MHz by using a low cost mechanical encoder with a variable tuning rate.
2 rows X 16 character LCD display.
A 4 x 3 Keypad used for easy freq entry.
IF, CW, SSB offsets settings when used with Transceiver/ Receiver.
Software calibration to WWV or equivalent.
Two VFOs and split freq operation.
19 user memories, memories freq + mode (i.e. LSB/USB etc.)
All settings are held in EEPROM and are permanent (but user can change it any time).
4 Band selection and 4 Mode selection outputs.
When operating below IF frequency, clockwise rotation of rotary encoder decreases DDS out put frequency but increases the display frequency.
RIT operation.
και μια πιο απλή κατασκευή για 0-6 ΜΗΖ mini-dds
http://home.swipnet.se/~w-41522/minidds/bot_mini.jpg
http://home.swipnet.se/~w-41522/minidds/minidds.html
http://www.hamradioindia.org/circuits/images/display01a.jpg
http://www.hamradioindia.org/circuits/dds.php
Range 0 to 70 MHz by 1 Hz step.
Freq setting in 1, 10, 100Hz, 1, 10, 100KHz, 1, 10 MHz by using a low cost mechanical encoder with a variable tuning rate.
2 rows X 16 character LCD display.
A 4 x 3 Keypad used for easy freq entry.
IF, CW, SSB offsets settings when used with Transceiver/ Receiver.
Software calibration to WWV or equivalent.
Two VFOs and split freq operation.
19 user memories, memories freq + mode (i.e. LSB/USB etc.)
All settings are held in EEPROM and are permanent (but user can change it any time).
4 Band selection and 4 Mode selection outputs.
When operating below IF frequency, clockwise rotation of rotary encoder decreases DDS out put frequency but increases the display frequency.
RIT operation.
και μια πιο απλή κατασκευή για 0-6 ΜΗΖ mini-dds
http://home.swipnet.se/~w-41522/minidds/bot_mini.jpg
http://home.swipnet.se/~w-41522/minidds/minidds.html