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| Spice me up this Schmitt trigger |
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| Zero999:
You're right about LTSpice. You'll find this kind of issue is very common with Windows software. Have you tried the other piece of software which also uses the .asc extension? I wish programs would look at the file contents before deciding what to do, rather than relying on extensions. Regarding the circuit: is there any reason why you didn't opt for an IC? The LM311 can drive 50mA, which is enough for a small relay. |
| soldar:
--- Quote from: Zero999 on January 14, 2019, 12:35:44 pm ---Have you tried the other piece of software which also uses the .asc extension? --- End quote --- Just double clicking on the .asc file results in PGP giving an error saying it is not a valid file. I have to say that I am finding learning LTSpice quite frustrating. I think it could be much more intuitive but I guess I got my money's worth :) --- Quote from: Zero999 on January 14, 2019, 12:35:44 pm --- I wish programs would look at the file contents before deciding what to do, rather than relying on extensions. --- End quote --- I believe Linux has no concept of file name extensions but relying on extensions has some benefits. One is that the same exact file can be treated differently if you change the extension. You can have two copies of the same file and they will be opened with different programs. Or they can be opened with the same program but treated differently. PowerPoint will open .PPT in edit mode and .PPS in presentation mode. And with name extensions the OS does not need to look into the file contents which could be encrypted or otherwise unusable to the OS. A file is a file. If I take a pure ascii text file the OS has no idea what that might be because it has no header. I see the header of an LTSpice file has no specific header for OS use. It starts "Version 4 Sheet 1" and that could be anything. I believe even Linux is beginning to use extensions and associate them with programs. --- Quote from: Zero999 on January 14, 2019, 12:35:44 pm --- Regarding the circuit: is there any reason why you didn't opt for an IC? The LM311 can drive 50mA, which is enough for a small relay. --- End quote --- Well, probably just had a ton of generic transistors lying around. I seem to faintly remember building the "complementary" version with two PNP's and one NPN because that way the variable resistor which provided the input would be tied to GND rather than the 12 V rail. |
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