The working principle and wiring of the frequency-modulated series resonant high-voltage test equipment are shown in Figure 1. The AC 220V or 380V power supply is converted into a power supply with ad...
Control issues regarding the direction of the 485 serial port in embedded Linux :
For the 485 serial port, in the default mode, the A and B levels are equal and it is the receiving state. When sending...
How can I use the 51 single-chip microcomputer to collect data from the video module and transmit it through the network interface? I now only know that I need a large-capacity data storage device, a ...
UHF and HF are both general technology categories, but each category has independent supporting protocols. HF is more consistent in the 13.56MHz frequency band, although there are many internation...[Details]
In order to prevent traffic accidents, when the intelligent detection device of the car detects danger ahead, it must send a warning message to the driver. The voice alarm clearly reminds the drive...[Details]
This article discusses how to use an ultra-low-power RF transceiver chip from Zarlink Semiconductor for pacemakers, neurostimulators, drug pumps, and other such implantable medical devices to achiev...[Details]
JTAG Technology Introduction
One disadvantage of shrinking technology is that the complexity of testing small devices increases dramatically. When the board area is large, the board is tested...[Details]
Engineers who are new to wireless design and wireless product development need to master the basics of
RF measurement
. In many cases, this process is to enable engineers who have been engag...[Details]
Designers of handheld products such as cell phones, digital cameras, MP3 players and personal digital assistants (PDAs) are continually challenged to deliver more functionality in a smaller form...[Details]
There are many ways to attenuate signals. The most commonly used method is to divide the voltage using resistors. The common circuits are as follows:
Oscilloscope pre-stage attenuation c...[Details]
Semiconductor devices used in high-end computing (advanced microprocessors) and consumer electronics (graphics and gaming chipsets) devices generally provide data rates up to 6.4Gbps through hig...[Details]
Power Integrations (PI) has introduced three charger/adapter reference designs using its new LinkSwitch-II series of AC-DC switching power conversion ICs. The new LinkSwitch-II devices use high-pre...[Details]
Most
embedded
systems are powered from a 48V backplane. This voltage is typically stepped down to a lower intermediate bus voltage of 24V, 12V, or 5V to power the circuit board racks withi...[Details]
Murphy's Law tells us that "what can go wrong, will go wrong". In the testing or production process of video equipment, problems often occur when we least want them to happen and when it is leas...[Details]
Abstract:
An amplifier solution for ceramic speaker systems is presented.
Keywords:
audio; ceramic speaker; amplifier; Class G
Today's portable devices require smaller, thinne...[Details]
introduction
With the improvement of social automation, human-computer interaction capabilities urgently need a major change, and develop in a direction that is more convenient to use and more...[Details]
Capacitive sensing user interfaces are emerging as a practical and innovative alternative to mechanical buttons in mobile phones. While capacitive sensors can be viewed as a drop-in replacement fo...[Details]
Abstract: This paper introduces the controller, interface, display principle and driving method of the handheld computer LCD display based on the SA1110 microprocessor. Combined with the HPC projec...[Details]
DIY/Open Source Hardware
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