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Circuit Scribe: Draw Circuits Instantly

kickstarter.com

1–10 of 17 posts

Re: Circuit Scribe: Draw Circuits Instantly

#4
post #3

Neat, but seems like a novelty. As far as usage in teaching circuits, it wouldn't be very useful after the first class. The bulk of learning about circuits is math.

That's because it is a novelty. You're pretty much restricted to planar circuits with this approach and the resistance is pretty bad.

Re: Circuit Scribe: Draw Circuits Instantly

#7

... a conductivity of 50-100 milliohms per square per mil ... That's pretty bad. Cue the video of him measuring 50 Ohms for that small scribbled line...

Yeah, it will be fine for high impedance signal paths, which are by far the majority of traces, but not so much for power. I'm not sure what to use for the power traces and hope they come up with some solutions or suggestions. As an EE I know where it is appropriate and where it's not and would hope that design/layout software could make that mechanical just because it's easy to do.

I jumped on the project as soon as I saw it and will be thinking about a solution myself.

Re: Circuit Scribe: Draw Circuits Instantly

#9

... a conductivity of 50-100 milliohms per square per mil ... That's pretty bad. Cue the video of him measuring 50 Ohms for that small scribbled line...

Yeah, it will be fine for high impedance signal paths, which are by far the majority of traces, but not so much for power. I'm not sure what to use for the power traces and hope they come up with some solutions or suggestions. As an EE I know where it is appropriate and where it's not and would hope that design/layout software could make that mechanical just because it's easy to do. I jumped on the project as soon as…

drawing over a given trace several times depositing more material might do the trick.

Re: Circuit Scribe: Draw Circuits Instantly

#10

what happens when you put too much current through? Does the notebook go up in flames? Having seen many fellow classmates flip polarities to watch caps explode, i can see them lighting up their notebooks with this..

Hooking up 230 V to a 2 cm @ 100ohm/cm resistance trace would generate about 250W of heat (unless I'm miscalculating something), which is about the power rating of a beefy soldering iron, or an amnemic hair drier, and at that lenght, it should be enough to ignite the paper. However you have to consider that
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