Some symbols for KiCad 5 converted as a test. As bitmap from clipboard:
After printing to PDF and changing line width with Inkscape:
SVG images are disabed in this forum, so PDF instead:
0-050098-11.edited.pdf (19.8 KB)
I believe Qspice is designed for calculations. That’s why R-LDR symbols without a control pin are puzzling. In LTspice I have a symbol of such a device with three pins. On the third pin I apply a voltage equal to the illumination of the light-sensitive pad.
Thanks for your work.
It is necessary to add more elements. For example: photodiode, IGBT transistor, Optocoupler.
Bordodynov.
Yes, the LDR is just included for its distinctive looks (compared to other standards) and not for its functionality (it’s just a regular R; the photo diode uses subckts from Analog so I didn’t include it yet). The idea is to provide some over-specified (retro style) symbols that can be easily modified (by removing or hiding unnecessary parts like envelopes or indicators) or composed from several symbols.
If get around, I’ll eventually also convert my more standard IEC/IEEE style symbols for LTspice/KiCad5 to QSPICE (they use 1.0 font size and fit better with the Builtin Symbols, but LTspice uses 160 dpi while KiCad5/QSPICE use 1000 dpi and KiCad has more features like filled polygons or UTF-8, so there is some adapting and working-around necessary.).
BTW, I recently came across this databook. Any of your integrated circuits?
Yeah. Five KP1533s. I’ve been doing reverse engineering. I reproduced the schematic and topology of the chips from the photo. It wasn’t a literal copy. I used a completely different topology for the output transistors. I was glad that I applied a more optimal emitter - narrower. But six months later, a new chip arrived with the A suffix and it had a narrower emitter on the output transistors than my transistors. It seems that the designers of microcircuits experimentally selected the size. I did so with determining the optimum area of the Schottky diode. Still, we have a different technological process of chip manufacturing.
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For reference, here are my symbols that were designed for LTspice (the SVG files show how the symbols were supposed to look like):
I wish QSPICE and LTspice supported the exporting of a schematic in SVG file format.
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Adapted IEEE variant of builtin inductor symbol:
«symbol L
«type: L»
«description: Inductor»
«shorted pins: false»
«line (0,200) (0,180) 0 0 0x1000000 -1 -1»
«line (0,-200) (0,-180) 0 0 0x1000000 -1 -1»
«arc3p (0,-180) (-62,-50) (0,-100) 0 0 0x1000000 -1 -1»
«arc3p (-62,-50) (-62,50) (0,0) 0 0 0x1000000 -1 -1»
«arc3p (-62,50) (0,180) (0,100) 0 0 0x1000000 -1 -1»
«text (100,150) 1 7 0 0x1000000 -1 -1 "L"»
«text (100,-150) 1 7 0 0x1000000 -1 -1 "<val>"»
«pin (0,200) (0,0) 1 0 0 0x0 -1 "1"»
«pin (0,-200) (0,0) 1 0 0 0x0 -1 "2"»
»
Conventional orthographic projection of helix:
«symbol L
«type: L»
«description: Inductor»
«shorted pins: false»
«line (0,200) (0,180) 0 0 0x1000000 -1 -1»
«line (0,-200) (0,-180) 0 0 0x1000000 -1 -1»
«arc (-140,-183) (80,-31) (0,-180) (-30,-31) 0 0 0 0x1000000 -1 -1»
«arc (-80,-31) (20,-76) (-30,-31) (-30,-76) 0 0 0 0x1000000 -1 -1»
«arc (-140,76) (80,-76) (-30,-76) (-30,76) 0 0 0 0x1000000 -1 -1»
«arc (-80,31) (20,76) (-30,76) (-30,31) 0 0 0 0x1000000 -1 -1»
«arc (-140,183) (80,31) (-30,31) (0,180) 0 0 0 0x1000000 -1 -1»
«text (100,150) 1 7 0 0x1000000 -1 -1 "L"»
«text (100,-150) 1 7 0 0x1000000 -1 -1 "<val>"»
«pin (0,200) (0,0) 1 0 0 0x0 -1 "1"»
«pin (0,-200) (0,0) 1 0 0 0x0 -1 "2"»
»
Same equation, different coefficient (k).