Website for the wiring

In the schematics circled orange and purple I see a transistor to what I think is connected to a black wire and black and red wires connected to each other. Are these junction points where I have to somehow connect the wires?

I'm a bit confused because with only two endpoints on the wires they all seem to connect together to fit into one pin on the arduino board and I don't see how I might be able to do that

enter image description here

  • \$\begingroup\$ It all comes downto the software... in a more compliant eCAD tool such junctions would indication an electrical connection and they would be very clear... this tool? who knows. \$\endgroup\$
    – user16222
    Sep 7, 2019 at 22:29
  • \$\begingroup\$ I also used a similar program as you did (DIY Layout Creator). Some people called it (in a negative way) a 'sketch' (not to be confused with Arduino sketches). However, when I tried to solder everything it was a mess (also because of my bad soldering technique and because wires are 'harder' to solder than components). I spent a few days to learn KiCad and now I'm 'used' to that 'notation' I would never go back. Also, all experienced people can read schematics and PCB layouts and it helps preventing the problem you have. \$\endgroup\$ Sep 7, 2019 at 22:59
  • \$\begingroup\$ That looks like a Fritzing ‘wiring diagram’, where they try to show package pin configuration and wiring on the same sheet. Kind of a hybrid between a schematic and a PCB layout. Is it possible to switch to a schematic view instead of a wiring diagram? \$\endgroup\$
    – MarkU
    Sep 7, 2019 at 23:03
  • \$\begingroup\$ Oh yeah I believe you're right, they used Fritzing and unfortunately I don't believe I can find the schematic view (deviceplus.com/how-tos/…) \$\endgroup\$ Sep 7, 2019 at 23:47
  • \$\begingroup\$ that is not a schematic .... it is a wiring diagram .... it is not a representation of the actual wire routing ... it is only a representation of what connects to what .... use a breadboard to connect multiple wires together ... you could build it same way as the picture, but you would have to solder and insulate the connections \$\endgroup\$
    – jsotola
    Sep 8, 2019 at 0:40

1 Answer 1


In normal schematic drafting, a T intersection implies a connection (junction.) Most CAD tools will also reinforce this by adding a dot to make this clear.

With this tool that looks like MS-Paint? No idea.


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