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| Eagle is a electric circuit schematic and PCB layout editor (http://www.cadsoft.de/). | Eagle is an electric circuit schematic and PCB layout editor (http://www.cadsoft.de/). There is a free version for non-commercial use. Although its functionality is limited (board size is 100x80mm max, up to two layers, one schematic sheet), it is still useful for small projects. The free version is installed in /cvs/cds/caltech/apps/linux/eagle/ It generates high quality garber files, so that we can send them to PCB manufactures. However, the main reason I installed eagle on the controls machines is that eagle can be used as a graphical editor for LISO input files. LISO input files are ascii text files. Usually you have to edit it using a text editor. A circuit is described as a net list. However it is not a fun to make a net list and there is a good chance of making mistakes. Using eagle's schematic editor, you can draw a schematic of your circuit, specify input and output points you want to test, specify a node where you want to measure noise and so on. Then you can convert the schematic into a LISO input file using a user language program (ULP), `liso.ulp`. A preliminary version of `liso.ulp` was included in LISO distribution. I enhanced it to be practically useful. I also created an eagle component library for LISO (`liso.lbr`) to be used with `liso.ulp`. |
LISO and Eagle on 40m machines
LISO is a circuit simulation and optimization program written by Gerhard Heinzel. It is useful for predicting the behavior of a circuit, estimating the noise, analyzing the stability of op-amps, fitting the measurement with the model, optimizing resistance/capacitance values etc. LISO is installed in /cvs/cds/caltech/apps/linux/LISO/. The LISO maual is here.
`liso` command
The main command of LISO is fil. It expects you to run the command always in the LISO installation directory. Since it is inconvenient, I wrote a wrapper script called liso. It is in the command search path of controls account. The script works just like fil except that you can call it from anywhere. The script takes the same arguments/options as fil. What it does is to convert given paths to absolute paths (if necessary) and change directory to /cvs/cds/caltech/apps/linux/LISO/. Then it runs fil passing the arguments given to liso.
Eagle PCB CAD
Eagle is an electric circuit schematic and PCB layout editor (http://www.cadsoft.de/). There is a free version for non-commercial use. Although its functionality is limited (board size is 100x80mm max, up to two layers, one schematic sheet), it is still useful for small projects. The free version is installed in /cvs/cds/caltech/apps/linux/eagle/ It generates high quality garber files, so that we can send them to PCB manufactures. However, the main reason I installed eagle on the controls machines is that eagle can be used as a graphical editor for LISO input files.
LISO input files are ascii text files. Usually you have to edit it using a text editor. A circuit is described as a net list. However it is not a fun to make a net list and there is a good chance of making mistakes. Using eagle's schematic editor, you can draw a schematic of your circuit, specify input and output points you want to test, specify a node where you want to measure noise and so on. Then you can convert the schematic into a LISO input file using a user language program (ULP), liso.ulp. A preliminary version of liso.ulp was included in LISO distribution. I enhanced it to be practically useful. I also created an eagle component library for LISO (liso.lbr) to be used with liso.ulp.