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In electronic, electric, instrumentation and automatic control equipment, it is often necessary to detect and determine the phase sequence of the three-phase AC power supply and whether there is ...[Details]
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Wiring instructions: //Left encoder PD3 INT1 PB0 PCINT0 //Right encoder PD2 INT0 PC3 PCINT11 /*************************************************************** * Function library description: diffe...[Details]
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1. MCU internal resources STC89C52: 8K FLASH, 512 bytes RAM, 32 IO ports, 3 timers, 1 UART, 8 interrupt sources (1) Flash (hard disk) - program storage space - erase and write 100,000 times, data wil...[Details]
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introduction
At present, LED large-screen display systems are divided into two categories according to the data transmission mode: one is synchronous real-time display; the other is asynchrono...[Details]
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Smart technology brings tangible value to individuals, businesses and society, including the experience value of insight into end-user needs, the economic value of breaking through industry standards...[Details]
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First, let's make the first light flash: start: SETB P0.0; (1) turns off the light LCALL DELAY; (2) is a delay, calling the delay subroutine instruction CLR P0.0; (3) turns on the light...[Details]
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The measurement principle of liquid flowmeter is Faraday's law of electromagnetic induction. The main components of the sensor are: measuring tube, electrode, excitation coil, iron core and yoke housi...[Details]
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The following program is an AVR external interrupt operation program.
It consists of a test program , a function and a header file .
/* *******************************************
* File ...[Details]
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//Serial timing
#include reg51.h
sbit ad9850_fq_up =P1^1; //Connect to the fq_up pin of ad9850
sbit ad9850_bit_data = P1^2; //Connect to D7 pin of ad9850
sbit ad9850_w_clk =P1^3; //Connect to the w...[Details]
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Pediatrics has always been the focus of Yitu Medical. In September 2017, Leifeng.com participated in the cooperation ceremony between Yitu Medical and the Children's Hospital Affiliated to Zhejiang U...[Details]
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Three-phase 380V motors are widely used. In some cases where there is only a single-phase power supply, three-phase motors can be converted into two-phase motors through some methods. However, ther...[Details]
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Since the detection method is only suitable for devices with small amounts of data, the serial port interrupt reception or transmission method should be used when a large amount of data needs to be se...[Details]
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For white LEDs
with a forward voltage of 3.5 to 4.2V (at 20mA),
a boost converter is usually required. A charge pump (such as MAX682 to MAX684) can be used together with MAX1916 to form
...[Details]
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Preface Fingerprint recognition , as the simplest form of biometric identification, has always been the first choice for identity recognition and authorization. In China, it can even be traced ba...[Details]
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On November 12, Allegro MicroSystems, a supplier of power and sensing solutions for motion control and energy-saving systems, announced the launch of new inductive position sensors and a series of ...[Details]
FPGA/CPLD
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