The circuit board is powered by a constant voltage source, and the output voltage is the correct +-5V, but when it reaches the circuit board, it becomes +2.2, -7.8. Are the components on the circuit b
1). What are the advantages and disadvantages of SOHC and DOHC? The design of DOHC is to make the angle of the flap more suitable for the shape of the combustion chamber, so the overall flap area can
1. Why use UPS? There is a common misconception that the mains electricity we use is continuous and constant except for occasional power outages. In fact, this is not the case. As a public power grid,
Long-term and large-scale recycling: the following factories or individuals across the country, inventory, idle, second-hand instruments and accessories. (1) Mobile phone comprehensive tester Agilent
The MM32F103 series of Lingdongwei products use a 32-bit microcontroller with a high-performance core M3, with a typical operating frequency of up to 144MHZ, built-in high-speed memory, and a rich set