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I believe that for power engineers, the contribution of oscilloscopes is irreplaceable. Once there is a problem with the product, it is necessary to capture the waveform, timing, and test accurate va...[Details]
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In modern high-rise buildings or public places, the establishment of various safety equipment is essential. Smoke alarms and emergency lighting are two common safety equipment. Smoke alarms are genera...[Details]
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发光二极管 (HB- led) 在每封装流明输出和光效 (efficacy ,单位为流明 / 瓦或 lm/W) 方面的性能快速提升。商用的 1 W LED 已提供有冷色温 LED( 色温 5000K) 的每封装流明输出超过 100 流明,光效达 100 lm/W ,而相同功率等级的暖色温白光 LED( 色温 3000 至 3500K) 也超过了 70 到 80 流明。与两年前相比,这些性能等级提...[Details]
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Contrast is one of the important indicators for evaluating the picture quality of liquid crystal displays (LCDs). In real usage scenarios, due to the influence of ambient light, the reflectivity of t...[Details]
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In the commodity trading process, an important parameter is indispensable—the quantity of the commodity. Natural gas, as a commodity, is also inseparable from the quantity of the commodity in the mar...[Details]
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IDC released the "Second Quarter China Wearable Device Market Quarterly Tracking Report". The report shows that in the second quarter of 2020, China's wearable device market shipments reached 26.58...[Details]
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As one of the most important components in a switching power supply, the switch tube is also the top priority in power supply debugging. The switch tube's turn-off and turn-on action is actually a re...[Details]
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Runhe Software stated on the interactive platform on June 11 that Huawei is the most important ecological partner of Runhe HiHope. The two parties have jointly released several high-performance AI co...[Details]
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In test and measurement work, we often need to describe all periodic signals. In this case, we will use amplitude and phase. Then the phase change of the signal must be calculated when the signal pas...[Details]
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At 21:08 on April 11, with the concerted efforts of relevant departments and participating units, the 72nd 330 kV substation of State Grid Shaanxi Power - the 330 kV Qifeng substation completed the...[Details]
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Recently, the Science and Technology Department of Jiangsu Province officially issued the "Notice on the First Batch of Provincial Science and Technology Development Plan (Engineering Technology Resea...[Details]
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Purpose: The microcontroller sends data and uses the PC's serial port to debug the received data.
program:
#include reg52.h
void UART_init(); //Serial port initializa...[Details]
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The main modifications to uboot are:
1. Change the cross compiler
CROSS_COMPILE ?= arm-linx-
2. Modify the board item
3. Include item modification
4. CPU item modification
...[Details]
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1. Circuit Principle
This circuit uses 89C2051 single-chip microcomputer to design the hardware circuit as shown in Figure 1. AT89C2051 has 2k bytes of flash programmable erasable read-only mem...[Details]
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When it comes to solid-state batteries, one thing that always comes to mind is "battery life". Compared with lithium batteries, this new type of battery has a battery life of more than 1,000 kilome...[Details]