Here is a first sketch of a one-layer Buffalo II/III compatible PCB for self etching:
I did not double check everything, there might be still some errors.
Maybe you could give me some feedback on routing, component placement or component size. I have not much experience in designing such bigger layouts.
A few comments:
First, I would like to thank Patrick, for making this circuit public and letting us use it in the non-comercial and amateurish way that we do things.
And on the layout:
- R1 and R2 are to be mounted on the backside of the PCB, like on the original SEN-PCBs, this way I could save a little space.
- R101/102 and C101/102 are the Vref Voltage divider.
- R103/104 and C103/104 are the DAC-output filter.
- Room for gate stoppers is included
- The voltage supply can be connected on the one end of the board, like with Legato/IVY. However, from there, isolated wires would have to be soldered under the board to the supply pins across the board (V1-V4). Alternatively the voltage supplies can be connected directly to their locations across the board.
- I did not include the 20k trimpot yet. I still have to squeeze it in somehow
Here is a dropbox link to the drawings in various formats. But I could not check the .dwg format yet. I don´t have Autocad here.
Regards
Florian
I did not double check everything, there might be still some errors.
Maybe you could give me some feedback on routing, component placement or component size. I have not much experience in designing such bigger layouts.
A few comments:
First, I would like to thank Patrick, for making this circuit public and letting us use it in the non-comercial and amateurish way that we do things.
And on the layout:
- R1 and R2 are to be mounted on the backside of the PCB, like on the original SEN-PCBs, this way I could save a little space.
- R101/102 and C101/102 are the Vref Voltage divider.
- R103/104 and C103/104 are the DAC-output filter.
- Room for gate stoppers is included
- The voltage supply can be connected on the one end of the board, like with Legato/IVY. However, from there, isolated wires would have to be soldered under the board to the supply pins across the board (V1-V4). Alternatively the voltage supplies can be connected directly to their locations across the board.
- I did not include the 20k trimpot yet. I still have to squeeze it in somehow
Here is a dropbox link to the drawings in various formats. But I could not check the .dwg format yet. I don´t have Autocad here.
Regards
Florian