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1. ULN2003 chip introduction
ULN2003 is a high voltage, high current Darlington array, consisting of seven silicon NPN Darlington tubes. The features of this circuit are as follows:
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All for the pursuit of ultimate engine response. Remember the super rare SLS AMG Electric Drive in 2014? It was a pure electric AMG model with 750 horsepower and 1000N·m torque. We can regard it as...[Details]
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In modern society, the use of new energy has become a green and convenient energy source. Among them, solar energy is an ideal alternative energy source with abundant resources, wide distribution and...[Details]
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1. Serial communication software simulates STM32 to send 26 English letters through serial port USART1 (configuration register) /*********************************************************************...[Details]
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The main content introduces the detailed usage of AVR microcontroller IO The relationship between the AVR microcontroller register DDRx PORTx PINx and the corresponding IO port (x represents a ...[Details]
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8. DMA Direct Memory Access (DMA) is used to provide high-speed data transfer between peripherals and memory, and between memory and memory. Data can be transferred through DMA without any CPU...[Details]
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Sending signals between processes Here we use the kill command to transmit signals between processes. For example, killing a process is also done by sending signals between processes: #kill -9 pid ...[Details]
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An adjustable resistor is a resistor whose resistance value can be adjusted within a certain range. It can be divided into two types: fine-tuning resistors and potentiometers. The potentiometer consis...[Details]
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Several situations of abnormal interrupt return: Important basic knowledge: R15 (PC) always points to the instruction being "fetched", not to the instruction being "executed" Instructions being exe...[Details]
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If the delay function is used to detect the key press, it will consume the memory of the microcontroller, which is not very good, so we have the following method: unsigned char cnt1 = 0XFF; cnt1 = ...[Details]
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Channel 0 is connected to the microcontroller power supply, and channel 1 is connected to the ground.
Source program: 3 files in total:
LCD1602display.h #ifndef _LCD1602DISPLAY_H_ #define ...[Details]
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The LTC3219 is an inductorless, low noise, high efficiency LED driver that provides nine independently configurable current sources for the main, sub and RGB display/display devices, and can perfor...[Details]
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1. Input voltage: 110VAC/DC or 220VAC/DC or 380VAC three-phase ±20%; or 85~264VAC full range
2. Input frequency: 47~63Hz
3. Output stability: 0.5% typ...[Details]
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introduction
With the vigorous promotion and application of electronic motor protectors, customers are more familiar with the application of this new type of electronic protection device. At t...[Details]
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Thermistors are a type of sensitive components, which are divided into positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC) according to their t...[Details]