A voice-activated light made using an offline voice IC. The voice chip can be programmed by the user.
The IoT-enabled ward call system uses a single circuit board that can function as both the caller and the called party, and users can select which call to make using a button.
The project uses the STC89C52 as the main control chip, the ESP8266 to implement IoT functions, and an LCD1602 screen to display data information. It also retains a voice broadcast interface and supports up to six customizable buttons.
This project is essentially a board relocation project and lacks universality.
SC8102 features:
● Built-in RDSON 11mΩ/27mΩ power MOSFET
● Maximum support for 5V 6A output
● Ultra-low quiescent current
● Programmable power limit
● Built-in DP/DM, supporting:
√ BC1.2 DCP mode
√ Voltage divider mode
√ 1.2V/1.2V mode
● Line loss compensation
● Selectable PFM/PWM operating modes
● Switching frequency adjustable from 80kHz to 600kHz
● Hiccup mode with automatic recovery
● Full protection against UVLO, OVP, OCP, and OTP
● Provides a 32-pin QFN 5x5 package;
protocol recognition is normal and can trigger fast charging on Xperia 5ii and Novate 7.
PDF_WT6636F+SC8102 Fast Charging Module.zip
Altium_WT6636F+SC8102 fast charging module.zip
PADS_WT6636F+SC8102 fast charging module.zip
BOM_WT6636F+SC8102 Fast Charging Module.xlsx
96487
Converting a mouse dry cell battery into a lithium battery_V1.0
Transformed circuit board from ultra-small mouse lithium battery, integrating charging, lithium battery protection, and step-down diode.
This mouse battery can be converted from a dry cell battery to a lithium battery, integrating charging and battery protection.
It features an ultra-compact size of only 11*31mm
, supports charging and over-discharge protection, and uses a diode-based step-down output to minimize standby current.
Wiring method:
Actual effect:
A red light illuminates during charging, and a green light illuminates
when fully charged. The lithium battery operates at 4.2V, with a fully charged output voltage of approximately 2.5V. It works perfectly with my Logitech mouse .
Due to the complex internal space of the mouse, it is recommended to disconnect the Type-C port and insert it into the mouse using a jumper wire
. When not used for mouse modification, it can also be used as a lithium battery charging module. To use this, remove the output diode and short-circuit the diode pads with a wire.
Note:
The project involved two boards, one single-sided and one three-panel. Since free prototyping did not allow for panelization, a panelization without V-cutting was used. It is recommended to choose a board thickness of 0.8mm for prototyping to facilitate cutting and insertion into the mouse.
Defect: This battery protection chip does not automatically activate after installing the battery. It needs to be activated by plugging in the charger after replacing the mouse battery. This is not a problem if the battery is soldered securely.
PDF_Mouse Dry Cell Battery to Lithium Battery Conversion_V1.0.zip
Altium_Mouse Dry Cell Battery to Lithium Battery Conversion_V1.0.zip
PADS_Mouse Dry Cell Battery to Lithium Battery Conversion_V1.0.zip
BOM_Mouse Dry Cell Battery to Lithium Battery Conversion_V1.0.xlsx
96488
WiFi Smart Switch
A switch
Based on the dimensions of commercially available E-Micro Unicom switches, ordinary WiFi switches made using a salvaged Tylc8 WiFi module from Lao Wang and the cheapest power module obtained free from LCSC Mall
likely do not meet safety regulations. Do not attempt to replicate them.
PDF_WiFi Smart Switch.zip
Altium WiFi Smart Switch.zip
PADS_WiFi Smart Switch.zip
96490
[Digital Electronics] Traffic Light Display Module
Traffic light circuit display module, including 6-channel LED display and 2 digital tubes.
Traffic light circuit display module, including 6-channel LED display and 2 digital tubes.
PDF_【Digital Electronics】Traffic Light Display Module.zip
Altium_【Digital Electronics】Traffic Light Display Module.zip
PADS_【Digital Electronics】Traffic Light Display Module.zip
BOM_【Digital Electronics】Traffic Light Display Module.xlsx
96491
electronic
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