Wireless charger 3.0 with empty fingertip design

Please Note!

This model is not compatible with the Bambu Wireless Charger Kit mystery box, purchasers of the mystery box should proceed to this version, this version and the mystery box version are parallel and independent releases. The black circuit board included in this version’s components is only available for purchase from me (to limit commercial use, understanding is appreciated), other components can be purchased online, although some parts require soldering with a soldering iron, naturally you can also purchase the component pack from me that includes all non-printed parts, in which all parts that require soldering have already been soldered, eliminating the need for a soldering iron to complete assembly.

Purchase Link: https://gf.bilibili.com/item/detail/1103737047

Bill of Materials Link: Empty Finger Wireless Charger v3.0 Bill of Materials 

Project Overview:

The Empty Finger Wireless Charger initially stemmed from a video I posted on Bilibili, as a Command & Conquer enthusiast, I am deeply fond of the unit designs in the game, and conceived the idea of 3D printing them as desk accessories, thus creating this Empty Finger Wireless Charger. Following its release, many users expressed considerable appreciation, and over this period I have produced a substantial number of units, with users providing much valuable feedback; consequently, this project has undergone continuous refinement. I even collaborated with Bambu to release a mystery box version, and the main version has now been updated to version 3.0. Not only have I reverted to the original phone-placement activation for the lights and radar, but several new functionalities have been incorporated:

1. Enhanced Audio: Sound effects now accompany power-on, charging initiation, cessation, and mode switching, all sourced from the original game’s audio assets.

2. Black Hawk Addition: Many users expressed a desire for a display-only version, leading to the inclusion of a Black Hawk aircraft.

3. Mode Enhancements: Acknowledging user feedback regarding the removal of phone-placement activation in version 2.0, this version restores this functionality and introduces expanded operational modes, currently totaling four: Standard, Focus, Sleep, and Performance. Power cycling resets the device to Standard mode. Mode switching is facilitated via a button, accompanied by auditory and visual cues.

1. Standard Mode: In this mode, charging initiation (placing the phone) and cessation (removing the phone) generate auditory signals, with the radar rotating and lights flashing. Mode switching is likewise signaled audibly, as is foreign object detection. Ideal for everyday use.
2. Focus Mode: Suited for work or public settings, this mode silences audio output, and the radar rotates only briefly upon charging initiation before deactivating. Lights continue to flash normally.
3. Sleep Mode: Designed for bedside use, this mode disables all movement, sound, and lighting (excluding the internal circuit board lights), retaining only the charging function to minimize sleep disruption. Foreign object detection remains active.
4. Performance Mode: Activated by pressing and holding the button for one second, this mode cycles through all available sounds and visual effects for approximately one minute before reverting to the previous mode. Perfect for demonstrations or personal enjoyment.

4. Metal Foreign Object Detection: Upon detecting metal objects on the charging surface or improper phone placement leading to excessive current, the device enters a protective alert mode: 1. Charging stops; 2. A power-off audio signal emits; 3. The RGB lights illuminate a constant red; 4. The radar and tower lights execute an SOS signal pattern. This mode reverts to the previous state once the foreign object is removed.

5. Refined TPU Motor Bracket: Further refinement of the motor bracket to optimize noise control.

6. Simplified Assembly: Streamlined assembly procedures and component design enhancements. Symmetrical parts are now interchangeable, the radar can be assembled and then glued without needing to be held steady as in the initial version. The screw count has been reduced from 60 to 40. This is achieved by using multi-color printing to combine multiple parts. The multi-color printing is primarily limited to specific layer changes without significantly increasing print time. Users without multi-color printers can achieve the same result via manual filament changes, as demonstrated in the accompanying diagram:

Layer color change tutorial video link

Wiring Diagram:

Assembly Instructions (Video version in Bilibili video P3):