wiretap wrote on 2021-08-23, 19:55:

I don't think there is enough room. I mean it may be possible if you're super good at placement & routing and use 0402 size caps/resistors. But I didn't check any assembly services to see if they even have these components available. Some are pretty specialized.

But, anyone is free to give it a go, as the project files are all there and it is open source.

Maybe add an extra board on top, with an arduino, two push button or a rotary encoder, and maybe a tiny oled display 😉

though I took a look at the datasheet of the Si5351 and wonder what clock speed will be output at first powerup without any data in the NVM of the Si5351 ?

I get the impression that a configuration will have to be written, which can afterwards be altered using the I²C bus, though if set at 50MHz, it won't be usable in an old 386sx16, and since it's a OTP NVM...

I'm not sure what would be there initially. Probably null. What I would do is program it to the original oscillator specification for the motherboard, then just write values to its RAM to change frequencies afterwards. That could be done with a rotary knob or buttons and an arduino with a screen/LEDs. You would essentially be selecting scripts to run to program oscillator output #1.

It has been nearly 3 years since this thread began. I have a few questions:

Has anyone assembled the variable full can oscillator version? If so, how did it work out, especially at high frequencies, e.g. 80-110 MHz?

Looks like the gerbers are 2 layers. Would there be any benefit in adding an inner ground layer?

Was JLCPCB able to source the components and do the assembly?

Has anyone priced the components yet? I noticed that Adafruit sells the Si5351A for only $7.95. If the components from wiretap's full can model are all to the Si5351A, I was wondering if it would be cheaper to buy the Adafruit unit and transplant all the components onto wiretap's PCB.

PCB's are cheap, $4.50 for 30 pieces, or $2 for 5 pieces.

Thanks.