Jurassic Park 4K Wallpapers Top Free Jurassic Park 4K Backgrounds Night Light Engineering Kit with Circuit Diagram (No Soldering Required). The Night Light kit uses a photocell to turn on and off the LEDs. This kit teaches students the principles behind photocell technology. This is the breadboard version of the 3200NTLTKIT Night Light Kit no soldering required! The breadboard replaces the PCB (printed circuit board). Note: Step by step instructions are not included use the included parts list to identify the components and assemble according to the included circuit diagram. Jumper wire not included (breadboard accepts 21 to 26 AWG wire).