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[Color Silkscreen] Musical Greeting Card - Heaven Official's Blessing

Overview

This project uses two core chips:
1. TP4057 rechargeable lithium battery charging management chip
2. WT588F02B-8S voice chip
.
The color of the colored silkscreen is very accurate; as long as the image is accurate, the effect will be visible. Highly recommended!

Function Description:
This project is an upgrade to a regular music greeting card. The card is made using a color-screened PCB. The opening action pulls the cord, connecting GND to the trigger button, thus triggering music playback.
Problems encountered:
1. The pins of the TP4057 were not labeled. Generally, pin 1 is indicated by the bottom left corner of the text, which was confirmed.
2. The charging LED did not light up. Measuring the VBUS voltage revealed no voltage. Removing the TP4057 did not resolve the VBUS issue; a short circuit between VBUS and GND was found. The short circuit was ultimately confirmed to be at the location shown in the image, covered by melted plastic.

Interested parties are welcome to rework this project. Further improvements are needed.
This is my first time making an electronic gadget; please forgive the poor quality of the video!

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2026-03-26 19:27:20

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