Intelligent desktop weather forecast system based on STM32

With voice recognition function, you can use voice to search for weather, as well as radio, temperature and humidity, calendar and other functions.

Schematic PCB

Lower cost, improved performance HDTV active reconstruction filters

In order to preserve the quality of HDTV and progressive DVD video, a bank of three (RGB/YPbPr), 5-pole reconstruction filters are used to set the 30MHz bandwidth and to provide the >40dB selectivity required by EIA770-3.

Electronic clock module schematic + PCB diagram (2012 version)

Electronic clock module schematic diagram + PCB diagram (2012 version), if you are interested, you can download it and take a look.

Schematic PCB

PTC IGBT driver reference design

OM13054: LPC-Link2

LPC-Link 2 is an extensible, stand-alone hardware debugger that can be configured to support a variety of development tools and IDEs using a variety of downloadable firmware. Additionally, it serves as an evaluation board in its own right for evaluating NXPLPC4370 triple-core MCU. Combined with the Embedded Artists add-on board, it can be used as an oscilloscope or logic analyzer!

Schematic PCB

Flexible fault protection

A flexible circuit is shown that limits current or removes power in response to a command from the user or other fault-indicating signal. It accommodates manual-reset (MR), over-temperature, and protection in hot-swap applications. Residing on either the backplane/host side or the removable-card/remote-device side of the backplane connectors, it guards against start-up faults when a card or board is inserted into a rack or host with the main power supply turned on.

Extending high-side current detector operating voltage to 1kV using optocouplers

This application note describes the use of a current-sense amplifier along with an optocoupler to extend the operating voltage range up to 1,000 volts for high-voltage applications. The circuit relies on the optocoupler's isolation barrier to separate the high-side and grounded side of the 1,000V system. Op amps are used to eliminate photodiode non-linearity and drift and provide an accurate output voltage proportional to the load on the 1kV supply.

NES-Game - Homemade handheld game console based on ESP32

Based on ESP32 and ATtiny861 to build a Nintendo NES game emulator handheld console with complete materials for making the project

Schematic PCB

Unattended automatic watering system

Grapevines use a lot of water and the soil dries out quickly, so they need to be watered twice a day. This project is about using an unmanned watering system to water flower pots.

Schematic PCB

MCIMX8M-EVK: i.MX 8M Applications Processor Evaluation Kit

MCIMX8M-EVK is an evaluation kit for i.MX 8MQuad, which provides high performance with high-speed interface and audio and video functions.

Schematic PCB

AlphaPose-real-time full-body multi-person pose estimation and tracking system

It is the first open source system to achieve 70+ mAP (75 mAP) on the COCO dataset and 80+ mAP (82.1 mAP) on the MPII dataset. To match poses corresponding to the same person in frames, an efficient online pose tracker called Pose Flow is also provided. It is the first open source online pose tracker to achieve 60+ mAP (66.5 mAP) and 50+ MOTA (58.3 MOTA) on the PoseTrack Challenge dataset. AlphaPose supports Linux and Windows.

Schematic PCB

Design of dual-tone doorbell circuit based on 555 timer

Design of dual-tone doorbell circuit based on 555 timer

Schematic PCB

Sugar glider health management system based on RSL10

The project uses RSL10 to build a sugar glider health monitoring system. With good exercise and diet, my little jelly (sugar glider) can grow up healthily.

Schematic PCB

High-precision LED electronic clock design based on STM8 (all design materials)

Based on STM8S003K3 microcontroller, it has alarm and chime functions and automatic light sensing function.

Schematic PCB

MAXREFDES38#: ECT/EPT current fault sensor

The MAXREFDES38# subsystem reference design is a 3-channel, high-accuracy, low-power analog front-end solution for EPT/ECT and smart-grid current fault-sensing applications. Hardware, firmware, design files, and lab measurements provide complete system information for rapid prototyping and development.

Schematic PCB

DIY retro game console MicroByte based on ESP32

The MicroByte is a tiny console capable of running games from the NES, GameBoy, GameBoy Color, Game Gear and Sega Master systems, with all components designed into this 78 x 17 x 40 mm package.

Schematic PCB

MIMXRT1170-EVK: i.MX RT1170 Evaluation Kit

Schematic PCB

Design and production based on lithium battery charger_with schematic diagram and PCB

Since my four-wheel drive robot is powered by a 16.5V lithium battery, and there is no charger for this battery on the market, I am very confused about charging it. In desperation, we designed a portable and simple lithium battery charger. Solve the trouble of charging. The charger can output an adjustable charging current of 100mA-1A. The input voltage is VIN>18V, and it can be charged with the 19V voltage on the laptop. Charging time is generally determined according to the size of the charging output current.

Schematic PCB

Satellite GPS path recorder based on STM32 (with complete source code)

Satellite GPS path recorder based on STM32 (complete source code attached).

Schematic PCB

Source program based on 51 microcontroller multifunctional smart desk lamp (with clock, posture correction, display temperature and brightness)

Function description: 1. After power on, the LED light lights up, which means that the current light is in automatic control mode; 2. You can switch back and forth between automatic and manual modes through button K5; 3. In manual mode, buttons K2, K3, and K4 correspond to A light brightness; (unavailable when k1 is pressed) 4. In automatic mode, it must first detect someone before automatically controlling the brightness, otherwise the desk lamp will go out. You can block the light of the photoresistor, or use a flashlight to illuminate the photoresistor to simulate changes in lighting, so that you can see that the brightness of the desk lamp will change as the light intensity in the environment changes. The effect is that the weaker the light, the brighter the desk lamp. . If the human body sensor cannot detect anyone for 1 minute, the desk lamp will automatically turn off. (The photoresistor is behind the USB lamp); 5. Whether it is automatic mode or manual mode, the brightness is divided into 10 levels, and 0-9 is displayed on the LCD; 6. Set date and time: Press K1 (setting ) key, the cursor will flash at the displayed year position, indicating that the year can be adjusted at this time. If you need to adjust the year, press K3 (plus) and K4 (minus) to adjust the year. Then press the K2 (move) key, and the cursor will flash when the month position is displayed. The month can be adjusted in the same way. Press the K2 key again to set the day, hour, minute, and second respectively. 7. When approaching the ultrasonic wave, the buzzer will alarm.

Schematic PCB