A Combinational Switch

I made a switch which can be easily combined and assembled. The main board is connected to the ground, and each of the other board is connected to different LEDs. You can enlighten different LEDs by inserting the corresponding board to the mainboard. In this way, you can control which LED to light up or just connect them in parallel so that all LEDS get enlightened.

Schematic diagram:





Yellow LED lights up
Green LED lights up







Yellow & green all light up!
Yellow & green all light up!

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