What is the difference between using * and ? in the day of the week in a cron expression? I checked some information, but none of them are clear. For example, one of the information saysCron expressio...
The driver board has arrived and has been soldered. I have been busy outside for a while and was sent by the company for training. I am only starting to post now.
It uses a conventional 6MOS driver, a...
Power management, battery management (26 questions and answers in total, compiled by TI power battery expert Richard Tang)
Selection design, fast charging and wireless charging, LDO design, battery li...
Seeing that @未见's Qinheng CH224D USB PD portable soldering iron is here , I was reminded of PINE64's latest portable soldering iron, which is based on the domestically produced Boluo BL706, supports l...
Liquid crystal display
(LCD)
panels have been popular since the early 1990s. Their main application products have expanded from notebook computers to desktop computer screens since the second hal...[Details]
According to foreign media reports, Apple will release the iPhone 12 series in November this year at the latest, which includes four models, all supporting 5G networks. According to a report ...[Details]
With the rapid development of autonomous driving technology, autonomous vehicles are gradually moving from concept to reality. However, in complex traffic environments and changeable weather condit...[Details]
According to Automotive News, the biggest danger in electric vehicle accidents, apart from the collision itself, is the risk of electric shock and fire caused by high-voltage components. However, ...[Details]
According to foreign media reports, lithium-ion battery and material technology company Microvast announced the launch of new battery packs MV-B and MV-C Gen 4, saying that the new battery packs hav...[Details]
Bloomberg News and Reuters quoted a report from The Information website saying that Apple CEO Tim Cook signed an agreement with Chinese mainland officials many years ago, promising to play a role in ...[Details]
Why do RM chips occupy the vast majority of embedded chips? This old news from 2003 may be able to answer this question.
From: Shuimu Community newsmth.net
Author: Wu Haijing 2003-9-6 14:12:43
Sou...[Details]
introduction
Since 1986, when Rober Bosch, one of the largest industrial enterprises in Germany, first proposed the CAN bus (Controller Area Network) technology for communication between variou...[Details]
1. Resistor detection method and experience: 1. Detection of fixed resistors A. Connect two test leads (regardless of positive and negative) to the two ends of the resistor to measure the act...[Details]
Performance Testing The internal structure of temperature-controlled thyristors is similar to that of ordinary thyristors, so the electrodes of temperature-controlled thyristors can also be found...[Details]
Chipmakers that supply Apple should have learned by now that they should never treat this business as a permanent one. Intel is the latest example, as Apple eventually replaced Intel processors with ...[Details]
The three major A-share indices closed higher today, with the Shanghai Composite Index up 0.61% to 3582.08 points; the Shenzhen Component Index up 1.41% to 14960.66 points; and the ChiNext Index rose...[Details]
LED lighting is recognized as the next generation of lighting technology due to its power saving, environmental protection and long life, and will replace various existing lighting technologies. LED i...[Details]
As people's demand for audio electronic products is getting higher and higher, the transition from 8-bit and 16-bit MCUs to 32-bit MCUs has become a market trend. As Asia's first original 32-bit micro...[Details]
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