MiniQ is a mini quadcopter that is open source from hardware design to control algorithm. The algorithm used for the Altitude Heading Reference System (AHRS) is the DCM complementary filter. The system calculates the height and controls the output PWM of the four motors 1600 times per second. It can be controlled remotely via Bluetooth (Bluetooth Serial Port Profile).
This work designs a smart water cup holder that can detect the use status of the water cup and remind users to drink water in time. By connecting to the Alibaba Cloud platform, automatic clock calibration is achieved. You can also set parameters for the water cup holder on the cloud terminal. The main work of this project is to design a beautiful interface that is pleasing to the eye. The other is to connect to Alibaba Cloud to realize cloud sharing and intelligent connection.
Freedom KL25Z is an ultra-low-cost development platform for Kinetis ® L series MCUs based on Arm ® Cortex ® -M0+ processor .
24V smart power switch expansion board for STM32 Nucleo, based on VPS2535H
This reference design features the DLP Pico™ 0.47-inch TRP Full HD 1080p display chipset and is implemented in the DLP LightCrafter Display 4710 G2 Evaluation Module (EVM), supporting use in accessory projectors, screenless displays, interactive displays, wearable devices including Full HD resolution is used in projection display applications such as head-mounted displays, signage, industrial and medical displays. The chipset used in this reference design consists of the DLP4710 (0.47 1080p) DMD, DLPC3439 display controller, and DLPA3005 PMIC/LED driver.
The development of the water level measurement voice alarm device is based on GigaDevice Innovation GD32E231C-START evaluation board. It can measure, display, give voice warnings, and report water levels to the cloud. Suitable for IoT monitoring of containers holding liquids such as rain counters and small water tanks.
STM32 Power shield and Nucleo expansion board (UM2243) for power consumption measurement
The overall idea of the project is to use the GD32E231 development board as the main control unit, use the LCD5110 display screen and two user buttons as the human-computer interaction module, use the infrared probe for monitoring, and use the AT24C02flash chip to save and record the triggering time of the monitoring alarm, so that Initial implementation of basic intelligent functions.
The i.MX RT1060 EVK is an evaluation kit for the i.MX RT1060 crossover processor, which uses NXP's advanced Arm Cortex-M7 core implementation.
Stepper motor driver expansion board for STM32 Nucleo, based on L6474
Designers need open-drain logic to run at 1.8V at the 1-Wire master IO. Most 1-Wire slave devices cannot run at 1.8V. This application note presents an RD (reference design) of a circuit that translates from a 1.8V 1-Wire master to a 5V
The board of this design is intended to sit between the fundamental and harmonic boards and monitor the SPI data running to the display. Onboard ECP5 will mirror the display and output a copy to a digital monitor.
The PTN5110 Type-C demo kit shows a fully functional USB PD connection between DFP and UFP. The motherboard and docking board can also be ordered separately.
LED brightness dimming changes the brightness by changing the LED's on-time. The longer the LED's on-time per unit time, the higher the brightness. In practical applications, it is controlled by changing the duty cycle. It can be seen from the light efficiency conversion characteristics of LED that when the same duty cycle is increased, the brightness increases more at low gray values than at high gray values. At the same time, at low gray values, every time the gray value changes by one In small units, the value of the light intensity increase rate D is relatively large. As the brightness increases, the light intensity increase rate D decreases, and the human eye's sensitivity to light changes also decreases. That is to say, the level jump is very obvious at low brightness. The brightness jump is particularly sensitive to human vision and cannot achieve a flexible effect of gradually brightening or dimming. The principle of smooth dimming is to improve the dimming effect of LED by changing the linearity of LED dimming curve.
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