Oct 20 2020
I DescriptionThe performance and structure of the stepper motor driver chip L297/L298 are analyzed. At the same time, combined with the AT89C52 single-chip microcomputer, a simple method of driving a stepper motor is introduced. This blog gives the control schematic diagram. The actual measurement ...
Oct 20 2020
DescriptionUC3845 is a high-performance fixed-frequency current-mode controller, designed for offline and DC-to-DC converter applications, providing designers with a cost-effective solution that requires minimal external components. These integrated circuits have a fine-tunable oscillator, precise d...
Oct 19 2020
I DescriptionDo you know the DC regulated power supply? DC regulated power supply is widely used in industrial production and daily life, and its design occupies a very important position in power supply technology. Therefore, based on the analysis of the problems of the traditional DC stabilized ...
Oct 19 2020
I. 74HC164 Introduction74HC164 adopts DIP-14, SO-14, SSOP-14 and TSSOP-14 package pin configuration. It is complementary to MOS 8-bit serial input and parallel output unidirectional shift register, the logic symbol is shown in the figure 1. The power supply voltage is 2～6V. In the figure 1, A and B ...
Oct 19 2020
I. DescriptionAutomatic gain technology (AGC) is widely used in the field of industrial automation closed-loop control. In industrial control, time-varying gain amplifiers are often needed to meet production needs, or made it has a certain regularity to ensure the stability of the control outpu...
Oct 19 2020
DescriptionThe L7800 series of three-terminal positive regulators is available in TO-220, TO-220FP, TO-220FM, TO-3 and D2PAK packages and several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distributi...
Oct 16 2020
I. IntroductionAD590 is a current output type two-end temperature sensor made by AD company using the relationship between PN junction forward current and temperature. Because the device has good linear characteristics and interchangeability, it has high measurement accuracy and has the characterist...
Oct 16 2020
I. IntroductionFor large systems such as missile weapons and equipment, their performance is often affected by the external environment and their own operating conditions. Among them, the influence of temperature often plays a very important role. Therefore, temperature detection and control has alw...
Oct 16 2020
I DescriptionThis blog introduces the working principle of the L298-based direct PWM speed control system. At the same time, the software and hardware components of the system are also given. The running test in the latter part of the blog shows that this L298-based direct PWM speed control system w...
Oct 16 2020
I DescriptionClass D power amplifiers are often used for music playback of various electronic products in daily life. The Class D power amplifier in this blog uses the NE5532 operational amplifier and LM311 to form a self-oscillation to generate a 150kHz carrier wave and modulate the input low-frequ...
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