[Color Silkscreen Printing] Photosensitive Pen Holder "From the Abyss"

The photosensitive box
is a very simple and interesting circuit, suitable for beginners.
The photosensitive circuit turns off the LED when the ambient light is strong and turns on when the ambient light is weak. The photoresistor R2 has low resistance in strong light and high resistance in weak light, thus creating a voltage divider on the base of the transistor, thereby controlling the transistor's on/off state. R1 is best tested at 24kHz brightness; you can replace it with a more suitable resistor for voltage division.
 
The circuit feasibility has been tested and the effect is good.
 
The entire circuit is on the bottom PCB (the silkscreen is Mitty from the Abyss).
 
The bottom circuit connects adjacent PCBs through windowed soldering
, which not only connects the circuit but also strengthens the stability of the box.
 
Windowed connections are made at the board edges, and the five boards are connected together with solder,
making it more robust and aesthetically pleasing. At the same time, the circuit is guided to the four side boards, realizing multi-board connection and allowing the sides to light up as well. Front
 
view (this picture is of Nanachi from the anime 'Made in Abyss').
 
 
Inside the box (still Nanachi) (ღ♡‿♡ღ).
 
Side view (the silkscreen is of Mitty's jar from the Abyss).
 
 
 
I filled it with stuff
 
and had my junior take a picture and
 
 
video on Bilibili. [Brothers, the JLCPCB color silkscreen is as pretty as my junior! Ｏ(≧▽≦)Ｏ] I assembled a photosensitive pen holder from 5 PCBs! - Bilibili】
 Bilibili link (You can see my junior here (｡>∀): https://b23.tv/xlcmSK3