I use pwm to read the sine wave table, but the output is just the duty cycle changing, not the sine wave. Is there something missing? Can an expert give me some advice? Thanks!...
[align=left][color=rgb(0, 0, 0)][backcolor=rgb(255, 255, 255)][font=微软雅黑][size=14px][size=4]As the title says, cortex-A8 platform, kernel version: linux 2.6.37[/size][/size][/font][/backcolor][/color]...
Share it with everyone:[if gte mso 9]>Normal07.8 磅02falsefalsefalseMicrosoftInternetExplorer4Before talking about accuracy, we must first talk about resolution. Recently, there have been hot posts dis...
Which type of pressure sensor should I choose? The weighing range I want is 0 to 2000 grams or 3000 grams. I hope you can give me some advice! I hope it is a voltage output type sensor so that I can d...
I need to put 100 sets of digital tubes (6 per set) in each grid with a spacing of 40CM. The data displayed is the number of things in the grid. I saw someone else's work. Each set of digital tubes is...
1. Suppose a data area is defined as follows: Suppose a data area is defined as follows: ORG 0100H NEME DB 'TOM', 20 DB 'ROSE', 25 DB 'KATE', 22 For the following groups of instructions, if they are l...
Traditional broadcasting systems generally need to be operated manually at a fixed time, and can only realize one-way broadcasting with few functions. Traditional bell ringing equipment has a singl...[Details]
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]
1. Circuit composition
The whole circuit consists of two parts:
1. Power saving control circuit
As shown in the figure below. Including delay circuit and drive circuit.
(1) Delay ci...[Details]
1. Introduction
With the growth of parking demand, the scale of parking lots is becoming larger and larger. A lot of research has been done on intelligent parking lots in China, but most of th...[Details]
Converged processors meet scalability requirements
In current embedded system design, solutions based on MCU, DSP, FPGA and ASIC account for more than 90% of the market share. These solutions ...[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]
1. What is temperature?
Heat is a type of molecular motion. The hotter an object is, the faster its molecules move. Absolute zero is defined as the temperature at which all molecular motion ...[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]
Among the many members of the single-chip microcomputer family, the MCS-51 series of single-chip microcomputers has occupied the main market of industrial measurement and control and automation eng...[Details]
From the previous section, we have learned that the timer/counter in the microcontroller can have multiple uses, so how can I make them work for the purpose I need? This requires setting the timer/...[Details]
Capacitors
are basic components in various electronic devices and are widely used for bypassing, coupling,
filtering
, tuning, etc. in electronic circuits. However, to use capacitors,...[Details]
0 Introduction
High-precision current source can provide high-precision current supply for precision instruments, and is suitable for automatic measurement tasks of various resistors in semico...[Details]
The serial interface real-time clock chip DS1302 launched by Dallas Company in the United States can trickle charge the backup battery of the clock chip. Due to the main features of the chip such a...[Details]
1. Proposal of
reconfigurable
measurement and control system
The measurement and control system generally refers to a system based on
computers
to realize data acquisition a...[Details]
At present, a large number of cooling tower fans, speed fans and special fans are in use in petroleum, chemical, pharmaceutical, metallurgical and other enterprises. Some fans have no monitoring in...[Details]