LA6NCA

SI5351 OSCILLATOR

I have designed an oscillator that can be
used for radio amateur transmitters and receivers.



I have made a video where I use oscillator #3A

OSCILLATOR #3A,









OSCILLATOR #3B,



SOFTWARE: OSCILLATOR3_roed_ny.ino

Key input: D4
Analog input: A0












How to use.
Connect a DC voltage of 6-15 volts to pin 12V and GND.
The oscillator is activated by connecting pin D4 to GND.
D4 has a weak pull up resistor to 5V.
A0 is an analog input that appears as a bar on the screen during transmission.
The voltage range is 0-5 Volts.


OSCILLATOR #1, WITH OUTPUT AMPLIFIER





Small size, only 50x50mm




The three buttons are used to set the frequency.




The bottom of the upper card is Arduino Nano.




The lower circuit board. 5Volt regulator,
Key circuit and amplifier.

LA6NCA17a_E.pdf



Key connections.
To start the oscillator, pins 5 and 6 must be connected together.




Tx OUTPUT is J4 P4



OSCILLATOR #2, WITH KEYING RELAY

Phono jack is the morse key input.





LA6NCA17_E.pdf









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