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2

The second block in your schematic is clearly a inverter with Schmitt trigger input. Since the first block was presumably drawn by the same person, I think they are trying to point out that it does NOT exhibit hysteresis, in contrast to the second block. That's a guess, but I think makes sense. Usually one doesn't draw anything special to indicate a block ...


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It is a schmitt trigger. Here's what wiki says: - What you have in your hand drawn symbol is a comparator with internal hysteresis something like as enacted inside a MAX999.


4

One popular and effective technique for laying out small-to-medium harnesses is through the use of a physical template. Make one sample harness with bundles lashed together only at critical points, and test it for accuracy. Now build a platform a little larger than the harness and lay the "go-by" harness on top of it. At each breakout, drive nails or screw ...


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Solid Works seems to have a package that will allow you to take a CAD drawing and route your harness in 2D and/or 3D. It will also track wire lengths, colors, connectors, BOMs and other things. http://www.solidworks.com/sw/products/3d-cad/electrical-cable-harness-and-conduit-design.htm Although this is very pricey, especially if you are doing low volume or ...


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In the diagram in the original post The bar symbol is analog ground (in this case). The triangle stands for analog ground. The lollipop is the Vdd supply rail. However, this does not follow the normal schematic convention. That's why that notation is confusing, and we have to tilt our heads and guess from the context. Standard convention The ...


5

The bar symbols are analog ground and the triangle symbols are digital ground. They would be tied together somewhere (not shown), probably directly at one point but it's possible there would be something like a ferrite bead. The orientation of the bars is immaterial (as with the triangle grounds). This particular device has sensitive 2.4GHz RF circuits ...


2

They are ground connections. The triangle symbols are ground, as well. For good noise immunity different grounds are used for analogue and digital parts of the device (AVSS and DVSS).


2

(For me.) On the pcb there's the connector footprint and label. If there are some important pins I might add text. (+V, GND, sig) to help with testing/ trouble shooting. The schematic tells the story and I'll add in what's on the other end of the connector. (maybe it's a thermistor that is one leg of a Wheatsone bridge.) I figure I want anyone else who ...


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In general, place the connector symbol to schematic and connect it to appropriate nets - it does not have to be in the correct order, because later you can adjust it from layout editor with pinswap command. For clarity, 'dummy' symbol with no footprint can be placed to schematic, to indicate what will be connected to the wires.


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Kicad global connector is valid for whole schema project (all sheets), hierarchical port provides connector on hierarchical sheet. It makes significant difference if your hierarchical sheet is reused more times or you have own library of sheets. In this case you can connect hierarchical connector on project sheet where hierarchical sheet(s) is/are placed. ...


3

Those look like they were actually drawn with either a schematic stencil or very carefully by hand. "By hand" is something people used to do before software. With practice, the art can be learned, but that's time consuming and lame. Just make a schematic in Visio and then apply a sketch filter with Photoshop.


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If you want to evaluate the IC I would start by ordering their eval board first. This will save you the trouble of designing your own board to work with that particular IC. You can then tweak it to get the performance you are after. In the user guide it shows this circuit. Pg 36 here. Here you can see they used 100Ω and 1u for Rc and Cc respectively. You ...



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