Circuit diagram analysis of RFID RF electronic lock in smart home

The core chip of RFID RF electronic lock adopts tx125 series contactless IC control chip of Tongxin intelligent technology. The RF card reading of the chip adopts 125kHz RF, and the card reading distance is 50 ~ 150mm. It fully supports the operation of EM, temic, TK and their compatible cards. In the RFID electronic […]

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Circuit design of portable heart rate measurement system based on MSP430

The HRV measurement system is similar to the heart rate measurement system of common fitness equipment. There are two common techniques for measuring heart rate: one is based on electrocardiogram (EKG) and the other is based on optical pulse pickup (as in pulse oximeter system). EKG is the most commonly used technology because it can […]

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Collection of electronic circuit diagrams of wearable medical devices Top13

Top1   Sensing circuit of sensing system of wearable lower limb assist robot   Circuit principle:The circuit is composed of detection circuit, signal amplification circuit and regulated power supply circuit. The detection circuit is composed of resistance RH, transistor VT and resistors R1 and R2; The signal amplification circuit is composed of A1, RP1, RP2, R3, […]

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Circuit design of a location free low power wireless charging system

A complete wireless charging system includes TX terminal and Rx terminal. The structure of wireless charging is similar to an air core transformer, and the energy transmission is realized by coil coupling. Usually, the transmitting coil and its driving circuit are installed in a charging board, and the receiving coil and its driving circuit are […]

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Circuit design of launch control timing detection system based on MSP430 Single Chip Microcomputer

Based on MSP430F149 single chip microcomputer, a timing detection system for launch control is designed. Using digital signal processing technology and computer automatic control technology, the system collects the control signal at the ignition contact and butt plug, analyzes the voltage amplitude, current, signal noise, rising and falling edge width of the signal, displays the […]

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Design of new intelligent flowmeter circuit module based on msp430f449

Flowmeter is an advanced instrument for on-line measurement of fluid flow in pipeline. It is widely used in petroleum, chemical industry, papermaking, metallurgy and other industries, and continues to develop in the direction of intelligence. This paper introduces a new intelligent flowmeter developed with msp430f449 single chip microcomputer. Its basic principle is: relying on the […]

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Circuit diagram daily reading (29): fingerprint identification access control system circuit module based on MSP430

The fingerprint identification system based on MSP430 is mainly composed of three parts. The first part is the fingerprint identification module, which is used to realize fingerprint sampling and comparison. Considering the problems of development cycle and system stability, the “programmable fingerprint module” B ig1080p-h fingerprint identification module is adopted. The second part is the […]

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