8051 ADC0808 Lcd Display Voltmeter

ADC converter Structure: Most of the physical quantities in the outside world are analog values. For example, heat, temperature, weight, humidity, light intensity, sound intensity, etc. They always change analogously. To provide connections of digital systems with the outside world; The measured physical quantities must be converted into numerical values that the digital system can understand.

Analog voltage quantities need to be converted to logic 1 or 0 values represented by certain voltage ranges. The systems that do this job are called ‘Analog-Digital Converters’ (Analog-Digital Converter, ADC).

The most important concept found in Analog-Digital converters is “bit resolution”. Bit resolution shows how many bits an analog signal is expressed.

In other words, it is how many bits the signal is sampled. The higher the bit resolution of the ADC, the higher the analog signal sampling accuracy/sensitivity. An 8-bit ADC can sample an analog signal with a maximum of 28 = 256 different values. If the maximum of the signal to be sampled by the ADC is 5v, each step size can be found as

8051 Voltmeter Schematic

ADC0808 8051 Lcd Display Voltmeter keil source code and proteus isis simulation files: