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The tone can be changed appropriately. Use medium-resistance headphones and a 1.5V battery in series for power. The entire analog radio is installed in a wooden or iron box, and the keypad, headph...[Details]
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If the volume potentiometer is only used to adjust the volume, the problem would be much simpler. But in fact, the volume potentiometer is the only way for the signal to pass. Its importance is of...[Details]
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1. Experimental tasks
(1. A 4X4 matrix of 16 buttons is designed to produce 16 tones.
(2. You can play the music you want to express.
2. Circuit diagram
Figure 4.22.1
3. System board ha...[Details]
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Recently, Wuhan Xinxin Integrated Circuit Manufacturing Co., Ltd. (hereinafter referred to as "Wuhan Xinxin"), a leading integrated circuit R&D and manufacturing company, has carried out in-depth coo...[Details]
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Contents The invention relates to a flow meter, in particular to a thermal gas mass flow meter. Background of the Invention As a complex technology, flow measurement has been applied in various occ...[Details]
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According to a survey result released by the US media on the 13th, about 65% of US corporate executives believe that US trade policies will have a negative impact on their company's business in the n...[Details]
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Yesterday, Huawei Mate 20 X 5G version passed 3C certification (model EVR-AN00), which is Huawei's first 5G mobile phone to pass 3C certification. Certification information shows that Huawei Mate 20 ...[Details]
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Phorism with 12V
R1 = 27 KOhm 1/4W
Q1,2 = BC 548
C1,2 = 15 nF polyester
R2 = 1,2 ΚOhm 1/4W
Q3 = 2N2219
C3 = 47 nF ceramic
R3 = 27 ΚOhm 1/4W
Q4 = 2N3055
R...[Details]
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The global semiconductor market is in a sluggish state, and TSMC's capacity utilization rate has plummeted in the first half of 2023. Although the explosion of generative applications has driven dema...[Details]
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The small household appliance industry is a typical labor-intensive industry, and market demand is rapidly iterating. The industry development is facing a small-batch, multi-variety production mode...[Details]
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How to choose the right oscilloscope bandwidth, bandwidth is the first parameter most engineers consider when choosing a Keysight oscilloscope. This article will provide you with some useful tips on h...[Details]
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Recognized for outstanding performance in NPI and customer growth July 6, 2022 – Mouser Electronics, the industry’s leading New Product Introduction (NPI) distributor with the widest selection of s...[Details]
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It is reported that with the continuous "rise" in the price of LCD panels, the two Korean panel giants LGD and Samsung Display (SDC) have successively announced the delay of the LCD panel production ...[Details]
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Checking whether the external AC voltage and internal DC voltage of electrical equipment are normal is the basis for analyzing the cause of the fault. Therefore, when repairing electrical equipment a...[Details]
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