Although the basic design for general lighting applications is relatively simple, the design becomes very complex when additional features such as phase cut dimming and power factor correction are req...
I'm learning about RF recently, and I'm confused about something. I'd like to ask you to help me with some parameters of the receiver: RFin=-80dBm~-10dBm, f=900M~1600M, each channel is 50M, OFDM modul...
[size=5]1. The analog crossover is a circuit device in the speaker that separates the input analog audio signal into different parts such as treble, midrange, and bass, and then sends them to the corr...
[i=s]This post was last edited by dcexpert on 2015-1-26 00:45[/i] I have been troubled by the USB routines on SAM R21 for the past two days. After downloading the USB CDC and USB Keyboard routines in ...
I used the JTAG port to export a FLASH thing, a BIN file, and originally wanted to use viewbin, cvrtbin, dumprom to export the content. But now it says "No signature B000FF. Not a BIN file". This BIN ...
[i=s]This post was last edited by dontium on 2015-1-23 11:22[/i]When doing electronic design, you often encounter some noise jumping up and down, like a square wave repeating in a cycle. This is jump ...
Emergency hand-held lamps powered by 6V maintenance-free batteries are widely used in rural areas. The charger used is a transformer step-down and single diode half-wave rectifier, and the charging...[Details]
The Mobile Industry Processor Interface (MIPI) Alliance is an organization responsible for promoting the standardization of software and hardware in mobile devices. It has released the D-PHY specif...[Details]
There are three types of mobile TV: one is based on analog TV broadcasting network, another is based on mobile communication network, and the other is based on digital broadcasting network. The f...[Details]
Battery life is critical for portable applications. For applications such as smoke detectors, security devices, and thermostats, factory-installed batteries need to last for more than 10 years. The...[Details]
1 Introduction
Ultrasonic waves have strong directivity, slow energy consumption, and can propagate over long distances in a medium, so they are used for distance measurement. Ultrasonic detec...[Details]
I. Introduction
Since RS232 has a short communication distance (only 15 meters according to EAT/TAI-232 standard), and can only perform point-to-point communication, it cannot directly f...[Details]
1. Introduction to CIF Board
Fieldbus integration based on PC system
Whether it is a master or a slave, fieldbus has won unanimous praise in the field of PC-based automation. For more...[Details]
Digital array radar (DAR) uses digital beam forming (DBF) in both receiving and transmitting modes to achieve flexible distribution and reception of RF signal power in the airspace, obtain excellent t...[Details]
Toyohashi University of Technology demonstrated electric field coupled wireless power supply technology using life-size car tires and roads at the wireless technology exhibition "Wireless Technolog...[Details]
TC9012F is a universal CMOS large-scale integrated circuit for infrared remote control signal transmission, suitable for remote control of TV, VTR, laser player and other equipment. In the market, ...[Details]
Problems such as the depletion of natural resources, air pollution, traffic congestion, and rising fossil fuel prices have forced societies and individuals to seek alternative means of transportati...[Details]
1. When the slip speed regulating motor is undergoing frequency conversion and energy saving transformation, the original excitation box (referred to as the speed regulating box) and the original s...[Details]
Motors, especially those with brushes, generate a lot of noise. This noise must be dealt with if the appliance is to meet the requirements of EMC standards. The means to solve EMC are nothing more ...[Details]
0 Introduction
Ultrasonic waves
are mechanical waves with a frequency of more than 20KHz, and the propagation speed in the air is about 340 m/s (at 20°C). Ultrasonic waves can be gene...[Details]