Simple and efficient programmable resistance board

Abstract

The invention discloses a simple and efficient programmable resistance board, which relates to the technical field of an electronic product. A USB (Universal Serial Bus) interface circuit (2) and a serial interface circuit (3) of the simple and efficient programmable resistance board are both connected with an MCU (Micro Controller Unit) circuit (4), the MCU circuit (4) is connected with a driving circuit (5) through an SPI (Serial Peripheral Interface) IN interface, the driving circuit (5) is respectively connected with an SPI OUT interface and a relay array (6), the relay array (6) is connected with a resistance array (7), and a power supply circuit (1) is connected with the USB interface circuit (2), the serial interface circuit (3), the MCU circuit (4), the driving circuit (5), the relay array (6) and the resistance array (7). Compared with a traditional PCI (Peripheral Component Interconnect) or PXI (PCI Extensions for Instrumentation) bus, the simple and efficient programmable resistance board disclosed by the invention has the advantages that the structure is simple, the weight is light, the size is small, independent use or cascade extension can be carried out, and the like.

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

[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

Images