How To Make 12v Battery Voltage Level Indicator Project

12v Battery Voltage Level Indicator Diagram.

Circuit Diagram

Circuit Components

1. BC547 Transistor -01pc [See Buy Click Amazon]
2. 1K ohm Resistor-02pcs [See Buy Click Amazon]
3. 22R Resistor -01pc [See Buy Click Amazon]
4. 1n4007 Diode -01pc [See Buy Click Amazon]
5. 3mm LED-Green -01pc [See Buy Click Amazon]
6. 3mm LED-Red -01pc [See Buy Click Amazon]

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Components used to 12v Battery Voltage Level Indicator Project:

BC547 Transistor



BC547 Transistor(NPN)

BC547 is an NPN transistor so when the base pin is grounded the collector and emitter will be open (reverse biased) and when a signal is applied to the base pin it will be closed (forward biased).

BC547 Transistor Features

1. Bi-Polar NPN Transistor
2. BC547 Transistor
3. Continuous Collector current (IC) is 100mA
4. Emitter Base Voltage (VBE) is 6V
5. Base Current(IB) is 5mA maximum
6. DC Current Gain (hFE) is 800 maximum
7. BC547 as Switch
8. BC547 as Amplifier

1K ohm Resistor



A Resistor is an electrical component that controls the flow of electricity in an electrical circuit. Or we can say in this way that the material or component That is used to block the flow of current in electronic equipment is called a Resistor. And, because of the characteristic of the resistor or conductor that Prevents the flow of current through the conductor, that characteristic or religion is called resistance, where resistance Means the ability to block. The main function of a resistor is to cause a voltage drop to impede the flow of current in the circuit. In this case, the question may arise as to which circuit or which Parts need to be protected from low voltage or current flow.

1n4007 Diode



Diodes are used to protect circuits by limiting the voltage and also transform AC into DC. Semiconductors like silicon and germanium are used to make the most of the diodes.

1N4007 is a rectifier diode, designed specifically for circuits that need to convert alternating current to direct current. It can pass currents of up to 1A and have a peak inverse voltage (PIV) rating of 1,000 V.

3mm LED


Light Emitting Diode (LED) Indicator lamps are a type of LED (Light Emitting Diode) lamp used to Display When a Change Occurs in an Electrical Circuit. When Something has Malfunctioned in an Electrical System, a red or Orange Light light-emitting diode Indicator Lamp may be used to alert a Worker. LED Indicator Lamps Usually consist of a single Bulb. Pilot lights and Light Emitting Diode indicator lights Indicate Lights for Machines or Instruments and they can also be built into Switches. They Provide Solutions for a Variety of Requirements and Are ideal for Highly Reliable Indications.

Frequently Asked Questions:

What is the maximum Collector-emitter voltage of Transistor BC547?

Transistor BC547 maximum Collector-emitter voltage is 45 Voltage.

What is the maximum Collector-Base voltage of Transistor BC547?

Transistor BC547 maximum Collector-Base voltage is 50 Voltage.

What is the maximum Collector current(Ic) of Transistor BC547?

Transistor BC547 maximum Collector current(Ic) is 100 mAmp.

What is the maximum watt of Transistor BC547?

Transistor BC547 maximum watt is 500 mWatt.

What is the maximum voltage of diode 1N4007?

Diode 1N4007 maximum voltage is 1000 Voltage.

What is tne average rectified foeward current of diode 1V4007?

Diode 1N4007 average rectified foeward current ic 1.0Amp

Video: Circuit Test