2812 uses a 30MHz crystal oscillator, 5 times the frequency, the clock should be 150M, but in fact the frequency multiplication does not work, the clock is still 30M, what is the possible reason? Also...
As shown in the figure below, if there is no resistor R3, then when the voltage at point A (i.e. Vin) is greater than (VT1+Vbe), the PNP will be turned on. If resistor R3 is added now, the voltage on ...
The input and output voltages of the first amplifier are the same. The voltage is not amplified, nor is it operated. What is its function? I don't understand the second amplifier at all. Why is an amp...
Welcome everyone to participate in the theme month event: [Quiz with Prizes] Every profession has its specialty, capacitors are my specialty! ( Those with the highest correct rate will receive a 4G su...
I want to do some math questions for the postgraduate entrance examination. Which postgraduate entrance examination tutor can explain the real questions in a detailed and easy-to-understand way?...
High efficiency and low standby power consumption are two major challenges in today's switching power supply design. Resonant topology or LLC topology is becoming increasingly popular because it ca...[Details]
Google's driverless technology is not only an eye-catching technology, but also a subversion of the car usage model.
Those who have watched anti-terrorism films and TV dramas must have been im...[Details]
With the development and widespread application of computer technology, especially in the field of industrial control, computer communication is particularly important. Although serial communication g...[Details]
Overview
As a remote network communication control method with advanced technology, high reliability, complete functions and reasonable cost, CAN-bus has been widely used in various automa...[Details]
Since the No. 4 blast furnace of Handan Iron and Steel was put into operation in 1993, its external equipment has been seriously aged, and the original PLC control system TDC3000 of the hot blast furn...[Details]
LED guardrail lights use fluorescent tubes or LEDs as light sources and continuous guardrails as carriers to form an approximately linear guardrail light strip. This article mainly introduces...[Details]
System Overview
The system consists of a signal preprocessing circuit, a single-chip computer AT89C2051, a systematic LED display module, a serial port data storage circuit and system software...[Details]
Among the uses of electrical energy, lighting accounts for a considerable proportion. Compared with the earlier ordinary incandescent lamps, the fluorescent lamps and energy-saving lamps we commonl...[Details]
One in five car failures are caused by batteries, a problem that will become more serious in the coming years as electric-by-wire, start/stop engine management and hybrid (electric/gas) vehicles be...[Details]
Movpower is a portable power bank. It can charge most mobile phones and digital products, such as digital cameras, PDAs, and mobile phones such as Apple, iPod, Blackberry, Motorola, Samsung, Nokia,...[Details]
DCDC means DC to DC (conversion of different DC power values). Anything that meets this definition can be called a DCDC converter. Specifically, it means converting the input DC into AC through a s...[Details]
The power consumption of a switching power supply includes fixed losses caused by parasitic resistances such as semiconductor switches, magnetic components, and wiring, as well as switching losses ...[Details]
This paper describes the design method of electronic multifunctional watt-hour meter, the key technology of hardware design and the software design process. Taking NEC's μPD78F0338 microcontroller ...[Details]
Preface
DS18B2 is generally used in conjunction with a single-chip microcomputer, and there are few reports on
the interface between
DSP
and DS18B20. Therefore, this article introdu...[Details]
introduction
Frequency characteristic tester
Also known as sweep frequency meter or frequency response analyzer, it uses a rectangular oscilloscope with internal scale as
a displ...[Details]