The reason a multimeter can measure current, voltage, and resistance lies in its use of a sensitive galvanometer. When a small current passes through the meter, the needle will indicate a value. However, the galvanometer cannot directly handle large currents, so it is necessary to connect some resistors in parallel or series with the galvanometer … Read more
This is a new model of the Nanjing Kehua MF47-F multimeter. Upon opening the back cover, it is easy to notice that compared to the old model, the most obvious difference is that the function switch section has adopted a rotating buckle design. After a thorough examination, I recently made a few modifications to achieve … Read more
Metal is applied to exposed pads using an organic coating, known as surface treatment. The surface finish protects copper pads from scratches and oxidation while facilitating soldering in a reflow oven. Although there are various types of surface treatments, ENIG and ENEPIG are two common types. Manufacturers typically use them for ceramicPCBs, flexible boards, and … Read more
Reporter: Liang YajiaNews Hotline: 0771-5690127Tip-off Email: [email protected] Recently, A young man from Dezhou, Shandong, born in the 1990s, named Zhao posted a video of a drone he made using chopsticks as the body, which attracted the attention of netizens. The drone costs only a few dozen yuan, and Zhao completed it in just 3 days … Read more
Back in 1989, when I couldn’t afford an oscilloscope but really wanted one, I searched through all the bookstores in the county and finally found a schematic for making an oscilloscope using a television. After building it, I used it for many years. Now, finished oscilloscopes are everywhere, and I don’t know which mouse has … Read more
Some screenshots from electronic books 【Complete Set of Hardware Learning Materials】
Printed circuit boards (PCBs) are the core components of electronic products, and their manufacturing and quality control are crucial for the healthy development of the entire electronics industry. To better regulate the PCB market, the Chinese government has established a series of relevant national standards. Below is a list of common PCB national standards, which … Read more
Click the image above to follow “Chuangxue Electronics” and easily learn electronic knowledge. Chuangxue Electronics Subscription Daily updates on technical articles in the electronics industry and the latest news on microcontrollers, making learning easy anytime, anywhere. A universal circuit board is a printed circuit board filled with pads according to the standard IC spacing (2.54mm), … Read more
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PCB Network News There are numerous standards in the circuit board industry, but how many of the commonly used printed circuit board standards do you know? The following is for your reference: 1) IPC-ESD-2020: Joint standard for the development of electrostatic discharge control programs. It includes the design, establishment, implementation, and maintenance necessary for an … Read more