Unit has been designed to help the students to learn how to perform the most common procedures and study the different circuits used to convert analog signals in a digital signals and viceversa. The unit also allows the user to study in detail another circuits related with the analog to digital conversion and digital to analog conversion, such us Adder circuit, Sample & Hold circuit, Serial converter, Frequency to voltage converter, etc. The unit includes a data acquisition system to acquire multiple analog signals and show the signals on the computer. The data acquisition system allows the user to generate a variety of waveforms (with the analog outputs) in order to test the different circuits with different analog signals. The data acquisition system also allows to use 24 digital inputs/outputs configurable as inputs or outputs.