Simple and highly effective programmable resistive plate

Abstract

A simple and highly efficient programmable resistive plate relates to the technical field of electronic products. The resistive plate comprises a USB interface circuit (2) and a serial interface circuit (3), both of which are connected to an MCU circuit (4). The MCU circuit (4) is connected to a drive circuit (5) through an SPI IN interface. The drive circuit (5) is connected to an SPI OUT interface and a relay array (6). The relay array (6) is connected to a resistor array (7). A power supply circuit (1) is connected to the USB interface circuit (2), the serial interface circuit (3), the MCU circuit (4), the drive circuit (5), the relay array (6), and the resistor array (7). Compared with traditional PCI or PXI buses, the resistive plate has the advantages of a simple structure, a light weight and a small size, and the resistive plate can be used individually or used in cascade extension.

Description

Technical field: [0001] The invention relates to the technical field of electronic products, in particular to a programmable resistance board based on a serial port and a USB port. Background technique: [0002] Most of the existing programmable resistor boards are based on the PCI bus or PXI bus. The resistors are customized and have high requirements for use. Especially for automotive electronics, there are many analog inputs, most of which are adjustable resistor inputs, and the input range is very wide. . Most of the existing boards are two-way adjustable resistors. In order to meet the test requirements, multiple adjustable resistor boards need to be installed, which not only increases the cost, but also requires that the computer or PXI machine slot must have enough slots, which is very important for building a complete test system. It is inconvenient to increase redundant overhead. [0003] In addition, the existing board resistors are customized, and the resistance...

AI Technical Summary

Problems solved by technology

Most of the existing boards are two-way adjustable resistors. In order to meet the test requirements, multiple adjustable resistor boards need to be installed, which not only increases the cost, but also requires that the computer or PXI machine slot must have enough slots, which is very important for building a complete test system. Increased redundancy overhead, very inconvenient

[0003] In addition, the existing board resistors are customized, and the resistance specification does not meet the requirements of the standard resistance value table E-96. Once damaged, the device of the same specification cannot be purchased from the market for replacement, and the board must be sent back to the original manufacturer. The maintenance costs are high and the time is long, which is not conducive to production, and R&D requires rapid response

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