Battery Level Indicator
A battery level indicator is a circuit that allows the user to monitor the percentage of the battery. In this page, I decided to create such an circuit and throughout this page, I will document the process of creating the circuitry.
Figure 1: My version of a battery level indicator
Where can this be found?
Battery level indicator can be found in different applications such as; in most electronic devices like smartphones, battery pack, etc. Some devices consists of bar displays, percentage, while others are more geared towards using LEDs.
Figure 2: Different examples
The Schematic
Figure 3 shows the explanation of the schematic of the circuit, which is briefly explained from the input to the output of the circuit.
Figure 3: Schematic
Testing
Figure 4 shows the testing of the circuitry. In the video, I demonstrated how the circuit behaves when power is being supplied, what happens when the voltage (from the power supply) increases or decreases, and how the circuit reacts when the "battery" is charging.