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The pulse generation circuit is composed of CD4060 and 32.768Hz quartz crystal oscillator to generate 4Hz pulse source. The 74LS293 counter counts the 4Hz pulse source, and its output terminal Q is c...[Details]
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When are pull-up resistors used:
2. The OC gate circuit must be equipped with a pull-up resistor before it can be used.
3. In order to increase the driving capability of the output pins, ...[Details]
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Dual-color LED display performance and main indicators
The 256-level grayscale LED display control system consists of a multimedia card, a long-line driver, a frame controller and a display uni...[Details]
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1. Basic concepts of security precautions
● General concept of safety precautions
According to the current Chinese dictionary, safety means no danger, no harm, and no accidents; preven...[Details]
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Tamara Schmitz
Mixed-signal solutions are an unstoppable trend. We want electronic devices to interact with us. Car doors should unlock automatically when we approach, and the computer s...[Details]
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How to use a radio to determine whether the TV line oscillator is working
Turn on the power switch of the semiconductor radio, turn on the TV case, and turn it on. When the radio being l...[Details]
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The third generation of the Universal Serial Bus (USB 3.0) is expected to open the door to mobile device applications. The USB Implementers Forum (USB-IF) recently announced a new charging specificat...[Details]
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Hard disk structure schematic diagram
The above picture is a schematic diagram of a common hard disk circuit. The valid data of the hard disk is stored on the disk. The magnetic head...[Details]
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Base station design
The PC base station is mainly composed of two parts: Bluetooth receiver and host computer JPEG2000 decoding. The principle is shown in Figure 2. The host computer decom...[Details]
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The circuit is mainly based on the 2.4 GHz two-way wireless transmission module JF24C. This module realizes high-speed data transmission function with a small volume, with a maximum rate of 1 Mb/s, a...[Details]
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1 Introduction
Tin-lead has long played the role of protecting the copper surface and maintaining solderability. From molten tin to spray tin, decades have passed. Several insurmountabl...[Details]
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VHF band frequency modulation circuit using variable capacitance diode
Function of the circuit
A frequency modulation FM transmitter that can be used in the FM broadcast band of 76~90MHZ is al...[Details]
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Component Selection
Except for BG2, which is a PNP germanium diode, the other crystal diodes in the circuit are NPN silicon diodes. The penetration current of these diodes should be as small ...[Details]
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Payment is the most important early application of NFC, but it is by no means the only one. NFC fully complies with the ISO standard for contactless smart cards, making access control another ideal a...[Details]
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In industrial control, the reliability and stability of the controller system are the most important parameters. The actions of the controlled mechanical parts follow the instructions of the controll...[Details]
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