5/16/2023 0 Comments Car battery indicator close to redBecause voltage that 11V exceed have current flow through R1 and ZD1 go to encourage a pin B of Q1 make Q1 work LED2 bright. If voltage 11V more than but 14V not exceed make LED1 the red and LED2 green stick bright. My son is testing this circuit again and modify this new. Thank very much Denis this circuit error. Which will the level volt normal, if level voltage a little 11V more make LED1 red stick bright. The work of the circuit be this circuit was fixed come to give a temple volt usual that about 11V-14V. Which be simple complicated can see that the circuit has will LED keep for display arrive at 3 step. This circuit is simple battery level indicator circuit. ![]() The Resistor values of Potentiometer VR1-3 are determined by the type of LED, when we used MV 50 LEDs many resistant, by steps of 2K for the 2V, and drain current (series circuits) in all three LED lights on the 5mA, the Chain LED can be extended, But the rapid increase in the drain current and the first LED in the current supply.Īs figure below we test this circuit on breadboard with 3V for first LED1, 6V for second LED2 and 9V for third LED3.Ĭircuit 5# Battery voltage level indicator circuit We use a variable resistor(Potentiometer) with 3 unit only, making this the circuit cheap and easy. When see in the below circuit is very simple. Today we look at the concept of a simple level indicator circuit, which are built to be very small, can be displayed with LED 3 step. Circuit 4# Simple three-step level indicator This circuit may is is simple good may advantage for friends, please sir. When Zener Diode quietly enhance the value Vz. The circuit on the right will testify to read the value is Bar Graph. ![]() And Vz of Zener diode +VLed should use RS for LED one by one. By in each the circuit LED stick bright when V+ goes up to arrive at Breakdown voltage. The Zener Diode, Resistor, and, LED as a result can show already. Today we come to see Voltage-Level Indicator in model easy most. But it might make circuits great work was complete. Simple Voltage Indicator using LED and Zener diode Since the LED can tolerate 20-30mA, R1 provides more than right current limiting.Ĭircuit 3# Simple Voltage Level Indicator using Zener diode Light-emitting diodes(LED) LED display is the indicator. In the circuit uses just two LEDs and one resistor only. It is suitable for showing to an audio signal or CW tuning indicator. You are meeting a tiny visual zero beat indicator circuit. See look like of both LED display in video below:Ĭircuit 2# Tiny visual zero beat indicator circuit The LED1 goes out because it gets reverse polarity. But not end, the current in C1 discharges to LED2. Then, we turn off, NO the current to the output. ![]() Now, C1 has the current full and there is less Leakage current. Until C1 is fully charging, LED1 will go out. If we turn on, the current flow through R1 to LED1, it briefly flashes as C1 begin to charge. In the circuit, there is the SPDT switch-S1. But LED2 will briefly flash after that it goes out, too. Images used in FAQ are for reference only. For more details about your laptop, you can download the user manual on the ASUS Official Website.Then, we turn off S1 to “OFF” to do not use the circuit. This indicator lights up when the notebook's Bluetooth or wireless network is on. The blinking indicates that the hard disk drive/disc drive is accessing the data. Prevent the battery and device from being turned off due to low battery power, so that you cannot save data and lose it. Note: When the battery level is lower than 5%, be sure to plug in the power to charge your notebook. Lights off : The Notebook PC is running on battery mode and the battery power is between 10% to 100%.Blinking Orange : The Notebook PC is running on battery mode and the battery power is less than 10%.Solid Orange : The Notebook PC is plugged to a power source,charging its battery,and the battery power is less than 95%.Solid White : The Notebook PC is plugged to a power source and the battery power is between 95% and 100%.The two-color LED provides a visual indication of the battery's charge status.Refer to the following for details: ![]() The power indicator lights up when the Notebook PC is turned on and blinks slowly when the Notebook PC is in sleep mode. The status indicators help identify the current hardware status of your Notebook PC.
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