1 firefly body 1 2 boxes of 1 3 PVC hard sheet 1 4 PCB circuit board 1 5 electric motor 2 6 battery compartment 1 7 double-sided tape 3 8 heat sink tube 2 9 blue light 1 10 Capacitor 1 11 Toggle switch 1 12 PNP transistor 2 13 NPN transistor 1 14 Photoresistor 2 15 100R 2 16 430R 2 17 3.3K 1 18 1.5K 1 19 Adjustable resistor 1 20 10K 2 21 LM358 1 Know common components Exercising hands-on welding ability Due to different batches, there may be differences in the appearance, color, and printing of the product, which does not affect its use Material: PCB colour: red Package Contents: 1 x KIT Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Distribution soldering iron and solder photosensitive Tail breathing light Provide detailed welding video tutorials and circuit schematic diagrams Foot vibration phototaxis