As the title says, I want to use 74HC165 to scan in 8 key signals, but when testing, I found that key 5 has no response when pressed. What is the reason? The reading procedure is as follows: CommandCo...
[i=s]This post was last edited by paulhyde on 2014-9-15 03:45[/i]If the input AC is 200~240V, 50Hz; now the output DC voltage needs to be ≤10V.
What should the schematic diagram look like? What chip s...
[p=26, null, left][color=#000000] [/color][/p][p=26, null, left][color=#000000]TMS320F28335 generates a multiplied clock signal CLKIN through an external clock signal, OSC and PLL. After CLKIN passes ...
[size=2]The EU has three directives related to medical devices, namely the MDD (Medical Electrical Devices) Directive, the IVD (In Vitro Diagnostic Devices) Directive, and the AIMM (Active Implantable...
[code]VOID
filterSendOriginatedBufferList(IN PMS_FILTERpFilter)/*Descriptions:This function is used to generate a net buffer list first,and then send it out!Arguments:pFilter - points to the filter mo...
introduction
Since the beginning of the 21st century, the world of information has changed rapidly. Maybe a high-tech product will be released today and a better similar product will be releas...[Details]
introduction
1 The significance of using RTOS on MSP430
It is understandable that it is meaningless to use RTOS on MSP430. Because the hardware resources of MSP430 are limited (for exampl...[Details]
A single-chip microcomputer is also called a single-chip microcontroller. It is not a chip that completes a certain logical function, but a computer system integrated into one chip. In general, a c...[Details]
introduction
my country has a vast territory and a large population. The scale of housing construction is huge, and the amount of residential construction is large and wide. It is still on t...[Details]
1. Overview
Will passive devices
produce nonlinear intermodulation distortion? The answer is yes! Although there is no systematic theoretical analysis, it has been found in engineerin...[Details]
AD8205 is
a single-supply high-performance differential
amplifier
launched by
Analog
Devices of the United States
. The typical single-supply voltage is 5V, and its common-mode volta...[Details]
As a simple and practical input device, buttons have been used in various microcontroller application systems and are ubiquitous. However, the buttons used in different practical occasions are also...[Details]
1 Introduction
There have been many studies on the detection and protection of power grid short circuit and line fault. The short circuit, overload and overvoltage protectors on the market have ...[Details]
Single-chip microcomputers are widely used because of their small size, powerful functions and low price. This article introduces the method of designing a micro electronic piano using the AT89C51 sin...[Details]
With the rapid development of the national economy, lifting and hoisting operations are used more and more frequently and widely in various fields of economic construction. China has continuously expl...[Details]
Distributed Wireless Communication System (DWCS) uses distributed antennas, distributed processing control, joint signal processing and other technologies to improve the system's spectrum efficie...[Details]
introduction
LEDs continue to gain popularity in automotive applications, thanks to their long lifespan and the flexibility they offer for body styling and interior design. Some may be surpris...[Details]
For battery-powered portable devices, in addition to breaking through the limitations of processing power, the performance of portable system power supplies also needs to be continuously improved. ...[Details]
a. Keep the battery clean, wipe off the spilled electrolyte, contaminated dirt and dust in time; keep the poles and terminal clamps clean and in good contact, and apply vaseline or butter to preven...[Details]
Don’t just look at the power when choosing a power supply
We know that a power supply with a low rated power can hardly meet the power supply needs of the system, which may cause frequent free...[Details]