![]() Scroll down until you reach the Notification Area and click on Select which icon appears in the taskbar. Adjust the potentiometer till LED 2 start to glow. Right-click on any area of the Taskbar and select Taskbar settings from the drop-down menu. Adjust potentiometer till LED 1 start to glow.įor over charged voltage calibration connect the variable DC power supply in place of battery and set voltage to 14.4V. For under charge voltage calibration connect the variable DC power supply in place of battery and set voltage to 11.3V. Wire up the entire circuit component as shown in circuit diagram. The charge of the battery continues as it hits the least preset level of 11.3V as set in the circuit and LED 1 glows to verify the low-level status. If LED is off the normal charging of the battery is ensured. Turning the switch off helps to protect the battery from overheating. Thus, LED 2 is used to indicate over charge voltage situation. When battery voltage reaches higher then predetermined value LED 2 start to glow. Similarly, VR 2 is used to adjust the higher voltage of battery. Thus, LED 1 is used to indicate under charge voltage situation. When battery voltage reaches lower then predetermined value LED 1 start to glow. Potentiometer VR 1 is used to adjust the lower voltage of battery. The zener diode connected in the circuit is in reverse mode in order to produce regulated output of 3.6V. Check the polarity properly while making connections with the 12V battery. The level monitoring circuit is fixed to the battery as shown in circuit. It is particularly important in the case of a battery electric vehicle. This will usually be a visual indication of the battery's state of charge. The status of batteries also needs to be monitored constantly, This, circuit does the job. A battery indicator (also known as a battery gauge) is a device which gives information about a battery. The main components of Battery State Indicator circuit are three low power general purpose transistor 2N2222. The circuit of Battery Status Indicator Capacitor is shown in figure 1. Circuit Description of Battery Status Indicator
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