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Recently, I encountered a problem when designing the schematic diagram, that is, the STM32 chip with 100 pins or less has no Vref. The power pins of the chip with 64Pin and below package are: VDD - MC...[Details]
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In mode 0 and mode 2, the serial port baud rate is fixed, mode 0 is Fosc/12, mode 2 is Fosc/32 or Fosc/64, which is determined by the SMOD bit of the PCON register. In mode 1 and mode 3, the baud rat...[Details]
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The PIC series 8-bit single-chip microcomputer (RISC microcontroller) developed by Microchip Technology Inc. in the United States, especially the microcontroller with built-in second-generation F...[Details]
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1. Burn the file system 1.1 jffs2 programming 1. Download the file system: tftp 30000000 fs_mini_mdev.jffs2 2. Erase blocks of files: nand erase.part rootfs 3. Burn into the file system...[Details]
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1. AC Impedance The
AC "resistance" formed by the combination of resistance (R), capacitive reactance (Xc), and inductive reactance (XL) in AC is called "impedance" (Z). Its formula is ζ=√(R2+(...[Details]
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1. Existing UPS design solutions
When data equipment is first built, it mainly uses AC power, so most of them are equipped with UPS devices to power them.
When configuring UPS equipment, ...[Details]
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There are many reasons for loss in the distribution network, among which line loss and network loss are the two most important ones. This paper first introduces the theoretical calculation method o...[Details]
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PS power supply module (system power supply):
It supplies power to the backplane bus and is irreplaceable. It provides working power for the CPU, signal modules and other expansion modules.
...[Details]
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1. Performance indicators (1) Sampling rate: 9 levels adjustable: 334kHz, 100kHz, 50kHz, 20kHz, 10kHz, 5kHz, 2kHz, 1kHz, 500Hz. (2) Working voltage: 3.5-5V, powered by built-in rechargeable lithium b...[Details]
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I believe everyone knows the hardware parameters of the iQOO Pro, which will be released on the 22nd of this month. One of the selling points of this phone is its built-in 4500mAh battery. Many peopl...[Details]
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Introduction: This paper discusses the detailed design methods of each unit circuit of the programmable broadband DC power amplifier in combination with the design scheme and existing problems of gen...[Details]
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CATL announced that it plans to sign an agreement with Tesla to supply lithium-ion power battery products to Tesla. The impact of this good news was also quickly reflected in the stock price. After t...[Details]
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0 Introduction Commonly used balanced charging technologies include constant shunt resistor balanced charging, on-off shunt resistor balanced charging, average battery voltage balanced charging,...[Details]
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Piranha LED is a square, transparent resin package with four pins and a missing pin at the negative pole. Piranha is a diffuse light LED with a luminous angle greater than 120 degrees, high luminou...[Details]
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Online UPS: When the online UPS is working, it first converts the mains power into DC power to charge the UPS battery, and at the same time, the inverter converts the DC power into AC power to power ...[Details]
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