Inexpensive function generator

The v1.0 PCBs are here!

You can purchase the v1.0 kit on the tindie page.

There is now a tindie kit available for purchase of the v0.4 prototype.
At the moment I only have the leftover parts from the prototypes, but I ordered more parts and new boards so I can have more kits in stock.

https://www.tindie.com/products/untemed/10-mhz-function-generator-diy-kit/

I've wrote a user manual on how to operate the device once in its original form Link.

I've finished doing various bug fixes, so now the files have been published.
The next step is to write s user manual.

I've found a few minor bugs with the firmware that need to be fixed.
Once that is done I'll do a minor PCB revision with only layout changes.
When I'll have everything completed and fixed I'll publish the project files.

I've completed the first version of the firmware with the basic functions and frequency sweep.
Unfortunatly only about 140b of program memory is left so there isn't much space to add more features without upgrading
the mcu.

I got the v0.4 pcb-s and soldered the parts and it works!
Everything now works as it should, all the voltages are matching as they should (previous version had some offsets).
Now the only thing left is to finish the firmware (and find two 100 ohm resistor somewhere).
Also the knobs are a bit large, so I'm looking for alternatives on ebay to replace them so the scale on the pcb is more visible.

I finished with the v0.3 and it works with a few minor bodges.
Now I'm about to order the v0.4 which should hopefully be the final version with the final modifications.

I finished routing the v0.3 PCB and ordered it.

Now it can also use the ATmega328 instead of just the 89C51.

I managed to add square waves to the output waveform types with a 74HC4053 without affecting the price too much.
Now I have to make a new PCB and test it out.
Link: Schematic