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Net Creation Bug?
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julianf20 2 years ago
I am relatively new to EasyEDA, but I do feel comfortable with it by now. I am running into an issue when placing a wire in the schematic editor. It seems that EasyEDA is creating a net that connects way too many components together, components that shouldn't be connected. For example, two ends the same resistor are connected in this net, shorting the resistor. Unrelated parts of the circuit are connected in the net. I have tried deleting the wires and rewiring, deleting and replacing the components, even replacing the wire with a net flag, but every time it groups the same components together in an incorrect net. I have shared the project so you can take a look. The net that is causing problems is "C3_1". You will see that the wire is connecting way too many things. Since I am still a relative beginner with this software, I am not sure that it is a bug or I am just doing something incorrectly. Please feel free to take a look. Thank you. Edit: I cannot actually share the project, oshwlab keeps telling me that I have not edited the project for at least a half hour to share the project even though I have ![Screen Shot 2022-03-09 at 12.09.13 AM.png](//image.easyeda.com/pullimage/mx6LQw3CUd0Ryw8er78FqDGEg85dYBsRcVrZgp4E.png)
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andyfierman 2 years ago
You could try adding me to your Team. :) You can also get around that by doing: ![image.png](//image.easyeda.com/pullimage/RsM82DETqjWEZ3p2AzhNRoKucxYASULJbZ79e6FH.png) then uploading the zip to some shared space
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andyfierman 2 years ago
BTW: if you want to convert a sawtooth to a triangle wave using a full wave recitifier, there are several far better ways to do it that avoid the diode drops that your circuit: ![image.png](//image.easyeda.com/pullimage/59KjPhKR3OcpOcCWLoxry6UwvvixeCayrNonlWRQ.png) Here's one: [https://easyeda\.com/andyfierman/Precision\_sawtooth\_to\_triangle\_wave\_converter\-eb9567312a3b431f9ce8062f170fe97f](https://easyeda.com/andyfierman/Precision_sawtooth_to_triangle_wave_converter-eb9567312a3b431f9ce8062f170fe97f)<br> <br> and another one here: [https://easyeda\.com/example/Origami\_a\_collection\_of\_guitar\_effects\_\-JFa4mEWe8](https://easyeda.com/example/Origami_a_collection_of_guitar_effects_-JFa4mEWe8) (sorry but I've not updated this project to run properly since the move from Ngspice to LTspice)
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julianf20 2 years ago
@andyfierman Ok I have added you to the project. Thank you for taking a look. And yes I know there are probably better ways to convert saw to triangle but this one uses very few components, and components that I already have on hand but I appreciate the tip on that!
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andyfierman 2 years ago
@julianf20, Please change the Category of this topic to Schematic Capture as the issue causing this is not a Bug. The problem is caused because you have copied and pasted U7.2 into U7.3 and U7.4 instead of placing the sub-parts from the library. The pin numbers of U7.2, U7.3 and U7.4 are therefore the same and so pin 5 of each symbol is connected to C3_1. Delete U7.3 and U7.4 and replace them from the sub-parts of the library symbol that you got U7.1 and U7.2 from and it'll sort itself out. If you're building synth circuits, you might like to play with this: [https://oshwlab.com/andyfierman/v2164-vca-simulation-demo](https://oshwlab.com/andyfierman/v2164-vca-simulation-demo)<br> <br> which uses: ![image.png](//image.easyeda.com/pullimage/ZILU5JqkquxOk4XgH4Z6IA4R0wxRYeDTmBRnWRSv.png) and this datasheet and apps note: [https://www.soundsemiconductor.com/downloads/ssi2164datasheet.pdf](https://www.soundsemiconductor.com/downloads/ssi2164datasheet.pdf) [https://www.soundsemiconductor.com/downloads/AN701.pdf](https://www.soundsemiconductor.com/downloads/AN701.pdf)<br> <br> which I used to help simulate and design these: [https://www.facebook.com/photo/?fbid=4731164186913396&set=p.4731164186913396](https://www.facebook.com/photo/?fbid=4731164186913396&set=p.4731164186913396)<br> <br> amongst other things... :)
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julianf20 2 years ago
Ah ok I did not know you couldn't copy and paste certain components like that. I will add them all individually from the library. Thank you for the help!
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andyfierman 2 years ago
"...I did not know you couldn't copy and paste certain components like that." There's nothing stopping you doing that but if you think about it: you want to place 4 devices each from a quad packaged device. Therefore - apart from the shared supply pins - each device must have uniquely numbered pins. Copying and pasting does not auto increment the pins so you have to place each sub-part separately from the library of that device. Alternatively you could copy and paste just one instance and then use the "i" shortcut key to edit the pin numbers to match each device instance.but that is not recommended as it is a longer and error prone manual task.
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