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The split balance is an indispensable teaching instrument in quantitative analysis work and is widely used in laboratories and research rooms. When measuring with an analytical balance, it is necessar...[Details]
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1 Introduction Scanning probe microscopy (STM) is the most important tool in the development of nanotechnology. It is based on the tunnel penetration theory in quantum mechanics. Its core is ...[Details]
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//Use LED digital tube to display the count value of counter T0
#include reg52.h //Header file containing 51 MCU register definitions
sbit S=P3^2; //Define the S bit as the P3.2 pin
unsigned char T...[Details]
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Use a multimeter to measure the forward resistance of the diode. Different ohm ranges will measure different resistance values. Because the diode is a nonlinear component, it can be seen from its vo...[Details]
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Ni-Cad batteries sometimes don't work and can no longer charge. In this case, the battery needs to be repaired. It's possible that the battery is shorted internally, and we can use a zapper circuit t...[Details]
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Fluke AirMagnet Survey PRO (AM/A4019-CH-G, AM/B4010, AM/A4018) AirMagnet wireless network tester is the industry’s most accurately planned and engineered 802.11n/a/b/g/ac wireless LAN Wireless site s...[Details]
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At present, the IC card model based on mobile phone terminals can be divided into two types according to the application scenarios: financial applications and non-financial applications (Figure 1).
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Most engineering labs have digital oscilloscopes, but many engineers don't fully explore their capabilities. One of the more interesting features of a digital oscilloscope is its math channel, which ...[Details]
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1. Introduction
As a composite device, the insulated gate field effect transistor (IGBT) integrates the voltage drive and high switching frequency of MOSFET and the low loss and high power c...[Details]
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The magnetic field interference generated by the power transformer has always been a problem that has plagued the improvement of amplifier quality. The power transformer can interfere with the amplif...[Details]
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Due to the epidemic, this year's CES had to be held online. Although it was not as popular as before, there were still many interesting products. For example, OtterBox and Microsoft launched a v...[Details]
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Earlier this week, industry rumors said that the lenses of the new iPhone series that Apple will launch in the second half of 2021 will have a more obvious upgrade. Digitimes also summarized the more...[Details]
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Minimizing power consumption and increasing power density while saving costs are important challenges faced by modern high-efficiency switching power supplies. The design goal of a switching powe...[Details]
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Today, Xiaomi MIUI reposted TÜV Rheinland’s Weibo: “Soon to be announced, TÜV Rheinland x @MIUI, the world’s first ________”. Judging from the fact that MIUI’s official Weibo reposted TÜV Rheinland’s...[Details]
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The constant pressure water supply system is an automatic control system widely used in the field of water supply. Its core equipment is the frequency converter. The frequency converter achieves co...[Details]