The FRDMCD1020EVM Evaluation Board (EVB) features the CD1020, a 22-channel switch detection interface with a programmable wetting current.
With the vigorous development of national real estate construction and the increase in construction projects, the problem of dust pollution caused by construction has become increasingly serious. In order to effectively and quickly monitor the dust conditions at the construction site, we use a hardware platform to collect dust PM2 at the construction site. 5/pm10 content information, the dot matrix screen displays the content information on site, and transmits the pm particulate matter (PM10/PM2.5) content information to the China Mobile OneNet platform through the GPRS network, and the dust regulatory authorities can view the dust content information through the platform. And it can be viewed through the mobile phone, which greatly facilitates the monitoring and control of dust pollution.
The GD32F350 development board uses the latest ARM Cortex-M4 32-bit general-purpose microcontroller GD32F350RB launched by GigaDevice. This chip comes with a 2-way comparator and is very suitable for making a low-cost digital capacitance meter.
Mainly using GD32F350 to make a light source controller to provide stable light source control for machine vision cameras, adding an external trigger function that can be connected to an external 24V signal (photoelectric sensor or PLC input), and a 24V output signal to trigger the camera to take pictures. Due to the diversity of application scenarios here, it is necessary to add user process configuration to control how long and when the four light sources are turned on respectively. Due to the life of the light source and the general glare of the light source, a parameter power-off retention function is added. In addition, it is also extended WIFI function. Live application scenarios are also tested in the video.
This design only implements the establishment of the basic framework, such as protocols, business processing, task processing, upper and lower computer interaction data, etc., and abstracts interfaces one by one, and calculates the solar altitude angle and azimuth angle at this time through SPA. Simply use the obtained azimuth angle, altitude angle, etc. to convert the PWM duty cycle to control the corresponding rotation of the servo. There is actually a lot that needs to be done.
Two outputs: 1: 0-30V/4A 2: 5V/1.5A (fixed output) Voltage resolution 0.458mV, current resolution 0.076mA Voltage step 0.0073V, the actual 0.1V step adjustment reset circuit is Both 51 and AVR are compatible. You can't solder all four original components. You can solder the reset circuit according to which chip you use!
As China's title of "Infrastructure Maniac" becomes widely known, more and more workers are engaged in dangerous jobs, such as high altitude, underground, tunnels, and engineering vehicles. In order to ensure the safety of these construction workers and ensure timely rescue in the event of an accident, I designed this safety black box for engineering personnel. This equipment can collect the heart rate of construction workers, the temperature and humidity of the surrounding environment, identify the state of movement, and determine whether a fall or collision accident has occurred. It is transmitted to the remote monitoring center through the network. Once the monitoring personnel find an abnormality, they can immediately organize rescue.
With the in-depth research of ultrasonic levitation technology by domestic and foreign scholars, ultrasonic levitation devices have developed from expensive horns and other equipment to structures composed of general-purpose commercial ultrasonic transducers. Combined with 3D model printing technology, any scientific researcher and Electronics enthusiasts can use these components to make ultrasonic levitation devices to facilitate related acoustic research. This technology was published in AIP Publishing by Asier Marzo et al. Based on its model, this design changes the main control MCU, uses the timer inside the MCU to generate accurate PWM waves, and improves the software so that the ultrasonic device can move the suspension stably during the axial suspension movement. Small objects in multiple nodes.
This power reference design provides up to 20 V/60 W over USB Type-C from a universal AC input range of 85 to 265 VAC for charger applications. The UCC24636 synchronous rectifier driver allows this design to provide 91% average efficiency. A daughter card provides the PD port control over the USB Type-C output connector. The required companion daughter card for this reference design is PMP11455. This design is USB-IF certified as a captive-cable power brick.
This is an incremental rotary encoder that uses non-contact magnetic sensing to detect rotational speed and direction. Two Hall effect sensors measure the 66-pole ring magnet and output two orthogonal signals. This automotive-grade solution is a low-cost, high-reliability alternative to conventional mechanical contact encoders due to its use of solid-state detection, which is immune to physical wear, dirt, corrosion and RF noise.
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