Analysis of a Flyback LED Power Supply Controller Circuit with PFC1. AC input mains voltage sampling divider resistor for PFC control; 2. AC input mains current sampling resistor for PFC control; 3. R...
stm32 LED, ADC driver code is as follows: if(LED_Flag==1) { PM25_LED0=1; //Light up the LED delay_us(320); PM25_LED0=0; //Turn off and wait for the next measurement LED_Flag=0; //Flag returns to 0 } i...
How can I control my filter driver to load only as a filter driver for USB mass storage devices? I saw that bushound's filter driver is loaded as a USB class lower filter. Now I only want to filter su...
The input voltage of LM2576 is 12V. When the total power consumption of my LCD backlight reaches 800MA, the inductor makes a terrible buzzing sound. I have tried the inductor connected to LM2576 from ...
Why do you need points to download? I know that I will offend many people after posting this, but I still can't help it. Unless the document you download is your own work, why do you need points to do...
I have just learned ucos-ii recently and want to port ucos-ii to mpc8247. I wonder if anyone has done related experiments and can provide a rough step-by-step guide. Thank you!...
1. Introduction
RFID (radio frequency identification) is a non-contact automatic identification technology that emerged in the 1990s. It uses the characteristics of radio frequency signal prop...[Details]
Microchip's PIC18F46J50 is a low-power, high-performance 8-bit USB microcontroller (MCU) using nanoWatt XLP technology. The current in deep sleep mode can be as low as 13nA, the operating voltage i...[Details]
Do you often have to add brake fluid to your car's brakes? The fact that you need to pump out the brake fluid to make sure there is no gas in the brake fluid line may not be done by the car owner h...[Details]
Analog engineers have traditionally struggled with complexity when designing power supplies that required multiple outputs, dynamic load sharing, hot-swap, or extensive fault-handling capabilities....[Details]
System design is a complex process. It is not enough to just use ICs. There are many details to consider. This article uses a high-fidelity music playback system as an example to introduce how to s...[Details]
The reason for the light decay of white LEDs: the decline of phosphor performance
So far, the rapid decline of the luminous performance of white light LEDs, especially low-power white light LE...[Details]
For a long time, due to the limitation of hardware conditions, the display devices of traditional small handheld devices such as PDA are usually monochrome LCD, and the user interface is very simpl...[Details]
Two simple circuits are implemented to drive two LEDs from a battery powered microprocessor.
This design is based on a circuit that uses three resistors and a microprocessor I/O pin as an input h...[Details]
Electronic systems are located at different points on the automotive power bus and therefore often need to operate under very stringent power requirements. These include load dump, cold crank, very lo...[Details]
In the previous series, we have listed some basic knowledge of C language in Tables 1 to 3. We hope that beginners can strengthen their memory of the above tables and gradually learn to use them wh...[Details]
Editor's note: In order to help technicians or engineers who have knowledge of PIC microcontroller assembly language quickly master the method of using C language to program PIC microcontrollers, t...[Details]
Microcalorimetry
is used to determine energy relationships. Microcalorimetry techniques are often required when performing calorimetric experiments with small sample sizes or slow heating rat...[Details]
1. Introduction
Testing the temperature of steel billets before rolling is an important measure to ensure the quality of steel. Traditional manual testing is difficult to ensure product qu...[Details]
General LED lighting has a current limiting resistor in the driving circuit, and the power consumed by the resistor has nothing to do with the LED light emission. In order to improve efficiency, a...[Details]
In recent years, with the rapid development of the information industry, dot matrix LED display screens have been widely used in various advertising and information display systems such as the fina...[Details]