Electrical – The circuit, especially 7 segment parts does not work at all


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I made a circuit of experiment 19 from Make : Electronics 2nd Edition. It's called "time transitor."

I made the first part of this circuit by referring the upper pictures, but when I connect the electricity, it does not work at all.

I want to figure out what's wrong with it.

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Best Answer

I see one thing that looks wrong.

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See the break in the blue line on the breadboard? That means that there is not a connection between that line and where you connected the ground. You have to jumper over it if you want it connected.