Design and Implementation of a Signal Reading Device for an Analog Output Module

Abstract

An Analog Output Module (AOM) is a multichannel signal generating device provided by EKE-Electronics Ltd, and there is a need for monitoring the AOM channels concurrently during testing phases or customer project work at the company. In this project, a prototype of a device was designed and implemented to measure different signal types such as voltage, current, and the PWM signal from the AOM. The analog signals were read by being dropped on a resistor, the value of which could be altered depending on the signal type. This was done to produce a voltage as an input to an ADC integrated circuit. On the other hand, the AOM PWM signal could be measured by an input capturing the peripheral of a microcontroller chip. The obtained results do not meet the desired requirements perfectly. The signal reading device is not entirely capable of detecting the smallest changes of the AOM signals. However, in conclusion, the results do satisfy the demand of testing and monitoring the AOM signals. The device is able to measure the AOM channels simultaneously, and the errors are insignificant enough so that the data is considered trustable.