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4-key six-digit display program org 00h start: MOV r4,#06h MOV r0,#30h clear: MOV @r0,#00h inc r0 djnz r4,clear l1: MOV r3,#0f7h ; scan initial value (P13=0) ...[Details]
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BOE (Beijing Oriental) grassroots people's congress representatives participated in the National Two Sessions and actively proposed high-quality development of the display industry On March 5, 202...[Details]
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1. Initialize the SD card.
I mostly use SPI mode now, so I will only discuss SPI mode here. In SPI mode, all instructions require the CS pin to be set to 0 first. So I will not emphasize this point...[Details]
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Power management has always been one of the main links in the design and maintenance of electronic products. In the past, if users wanted to know the power supply status, they could only use the limi...[Details]
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Revolutionary technical highlights
Introduction: The 2014 Beijing International Automotive Exhibition will be held in the new and old exhibition halls of the Beijing China International Ex...[Details]
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The remote control switch not only has the function of a switch, but also has the function of controlling indoor lighting while replacing the traditional wall switch. It is an indoor lighting contr...[Details]
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As the latest masterpiece of iQOO, the iQOO Pro 5G mobile phone has attracted the attention of many users with its powerful mobile phone performance. As one of the cheapest 5G mobile phones in t...[Details]
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For servo motors that require angular rotation position feedback, pulse width modulation (PWM) signals are generally applied to precisely control movement. Engineers can change the angle and directio...[Details]
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1. Key performance parameters of inverter: MPPT
1. Introduction to MPPT MPPT, which is the abbreviation of Maximum Power Point Tracking, means that the inverter adjusts the output power of...[Details]
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On July 31, Yangdong District held a signing ceremony for two major projects, Dalian Rongke and Zhongqing Zhihui. This signing event is not only a vivid practice of learning and implementing the Third...[Details]
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During driving, potholes on the road can cause damage to the vehicle's tires and suspension system. When passing through some extreme roads, the driver's distraction can cause more serious consequenc...[Details]
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LED lamp is a kind of light-emitting diode, with forward voltage drop of 1.6V~2.2V and current of 2~20mA. When the current is 2~5mA, the brightness increases with the increase of current. When the cu...[Details]
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Abstract: TEC9503 is a special integrated circuit specially designed to display the functional status of audio equipment and can provide a variety of status displays. This article introduces the...[Details]
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We have analyzed the BOM table of QCY T1C true wireless Bluetooth headset. This time we will analyze the number of components and their cost. Device analysis description: Before we start the analy...[Details]
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The development of fast charging technology continues to break through the power limit. As the power increases, the temperature rise effect of the chip becomes more significant, and the heat loss i...[Details]
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