Lonely Rock Glowing Bookmark Pendant Light DIY Peripheral Capacitor Switch

The overall design

mimics the effect of film reel, with immersion gold filling and solder mask openings on both sides. Another approach is slotting, but I didn't try that (actually, I ran out of color silkscreen printing coupons).
The silkscreen printing on both sides was drawn in Photoshop. The four images of "Lonely Rock" are from the internet; I couldn't find the artist's information, but I'd like to express my gratitude here. (This open-source project is non-profit; please contact me if there are any copyright infringements.) The first four

images show

the PCB with no obstruction and individual LEDs lit; the fifth image shows the PCB with obstruction (A4 paper) and all LEDs lit.

Implementation principle

: Touch buttons: A capacitive touch switch solution is used, with the touch IC being TTP223E-BA6.
LED on/off: An NMOS is used, with the gate connected to the touch IC's output, and the source and drain connected to the LED and GND.

Documentation

: Project with lighting: Version with components; it is recommended to carefully read the text description on the schematic before replicating.
Project without lighting: Version without components, for design reference only. Attached are PCB bookmarks - front.png and PCB bookmarks - back.png: These are replicas
of the original silkscreen images exported from Photoshop. Note that the PCB uses a color silkscreen printing process. When ordering, it is recommended to first select immersion gold and white solder mask, and then select color silkscreen printing. The price is 50 yuan for 5 pieces. Using a 50 yuan color silkscreen printing coupon will allow for free board making. The LEDs were purchased from the Taobao store Youxin Electronics, with the keyword "0805 LED high brightness". For aesthetic and economic reasons, the component packages are generally small, requiring some patience for beginners when soldering. Another recommended option for the lighting is ceramic filament; you can try it if you are interested.