Can anyone suggest a sketch for a simple switch tuned vfo using the Si5351 clock generator. In this case I don't need an lcd or rotary encoder.
A possible approach might be to modify one of the example sketches.
Don
Hi,
Have you googled Si5351 clock generator arduino
Can you please tell us your electronics, programming, arduino, hardware experience?
Thanks... Tom... 
I have completed an number of Arduino projects related to Amateur Radio so I am familiar with uploading and modifying existing sketches by some trial and error but my expertise does not extend to writing sketches from scratch.
Whilst I was working I was a service engineer, repairing electronic equipment but not involved with design.
I have seen a number of sketches but they are for vfos with rotary encoder and lcds or just fixed tuned for one frequency per clock. I would like to use just one clock and switch manually between say half a dozen preset frequencies.
Although I enjoy modern electronics i prefer valves but they and their associated components are getting expensive.
Don m5aky
m5aky:
Although I enjoy modern electronics i prefer valves but they and their associated components are getting expensive.
Must live in a cold climate! 
Hi,
m5aky:
I have seen a number of sketches but they are for vfos with rotary encoder and lcds or just fixed tuned for one frequency per clock. I would like to use just one clock and switch manually between say half a dozen preset frequencies.
What do you mean by clock, the code should have where variables are transferred to the 5351 to make it generate an output.
You just need to have your code transfer from a list of frequencies you have in your controller the respective data to make the 5351 output.
You aren't trying to get the 5351 to generate more than one frequency at a time?
Have you got the device to experiment with?
If so have you tried some code?
Tom....