Simple Arduino AD9850 DDS VFO for 20m, CW
LZ2WSG, KN34PC
Idea by UY1IF

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5.05.2017, v3: dds_vfo_ad9850_20m_cw_03.zip

Frequency: 14.000-14.250 MHz
Step: 100/10 Hz

Default Frequency: 14.060 MHz
Default Step: 10 Hz

LED Indicator: 
ON: step 100 Hz 
OFF: step 10 Hz

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2.12.2017, v5: dds_vfo_ad9850_20m_cw_05_oled_091.zip

Frequency: 14.000-14.250 MHz
Step: 10/100 Hz

Default Frequency: 14.060 MHz
Default Step: 10 Hz

OLED 0.91" display
step 10 HZ is displayed as 14.060.00
step 100 HZ is displayed as 14.060,00

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20.12.2017, v6: dds_vfo_ad9850_20m_cw_06_oled_091_s_meter.zip

Frequency: 14.000-14.250 MHz
Step: 10/100 Hz

Default Frequency: 14.060 MHz
Default Step: 10 Hz

OLED 0.91" display
step 10 HZ is displayed as 14.060.00
step 100 HZ is displayed as 14.060,00

S-meter: 13 characters for S = 1,2,3,4,5,6,7,8,9,+10,+20,+30,+40
Input Voltage: (0-5,0)V or (0-1,1)V

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20.12.2017, v7: dds_vfo_ad9850_20m_cw_07_oled_091_s_meter_rx_tx.zip
Frequency: 14.000-14.250 MHz
Step: 10/100 Hz

Default Frequency: 14.060 MHz
Default Step: 10 Hz

OLED 0.91" display

S-meter: 9 characters for S = 1,3,5,7,8,9,+10,+20,+30
Input Voltage: (0-5,0)V or (0-1,1)V

RX/TX indicator
10/100 Hz Indicator

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21.12.2017, v8: dds_vfo_ad9850_20m_cw_08_oled_091_s_meter_rx_tx.zip
Frequency: 14.000-14.250 MHz
Step: 50/250 Hz

Default Frequency: 14.060 MHz
Default Step: 50 Hz

OLED 0.91" display

S-meter: 9 characters for S = 1,3,5,7,8,9,+10,+20,+30
Input Voltage: (0-5,0)V or (0-1,1)V

RX/TX indicator
50/250 Hz Indicator