Battery level indicator circuit using transistor. LED turns ON when battery voltage drops a preset level.
Battery level indicator circuit using transistor May 26, 2025 · Learn how to build a simple 12V low battery indicator circuit using transistors and a Zener diode. This circuit will detect the water level for different containers and act as an alarm. Water Level Indicator Step 4 Place the end of the 100 ohm resistor 1 hole behind the 4. A buzzer sounds an alert when the water reaches the top level, helping prevent overflow or wastage. step-by-step instructions for building specific LED circuits or projects, along with circuit diagrams and explanations of the circuit components. So, can I know what are the different types of options So, in this article, you’ll learn everything about battery charge indicators and how to make an easy battery charge indicator circuit. 7v Battery level indicatorBattery level indicator circuit Circuit Diagram of My Every Projects will be displayed during This circuit diagram depicts a simple 3. This IC is really a lot adaptable than the other opamp alternatives as a result of its higher voltage tolerance level and as a result of the quad opamps in one package. Oct 15, 2024 · In this article, you will learn to build LM3915 battery voltage level indicator. Circuit is very simple 12v zener Diode is used with reverse polarity and will not allow to pass any voltage when voltage is under 12v and when voltage crosses the 12v and reaches to 13v Zener Same method is used in this circuit when voltage crosses the rated zener voltage then excess voltage passes to other end to which led is connected and then led glows and indicates charge level in Jan 9, 2020 · The Water Level Indicator Circuit Using BC547 Transistor is a powerful and versatile solution that provides an easy-to-use and cost-effective way to determine the water level in a variety of applications. When the battery is fully charged the circuit LEDs will turn on, and the LEDs will turn off one by one as the battery runs down. co Battery Level Indicator Circuit, use TL431 Experiment Swatch 8. 7V Battery level indicators are such a circuit through which you can know that battery is full or not by just simply connect the battery to it. 7V lithium Battery Level Indicator”. Edit : I just got an idea , What if I use pnp transistor for this purpose ? I don't have circuit schematics right now but idea is : battery > voltage divider middle > pnp transistor's base . Every transistor on the LED is configured to that transistor. The key components of the circuit include a BC-547 transistor, 220-ohm resistor, LED lights of different colors (red, green, yellow), a buzzer, 9V battery, and a water glass. Also, by battery level indicator, the user is instigated to charge the battery before it dies. To achieve this 4 leds are placed somewhere on the dash of the car. This circuit is helpful in determining the different levels of sound and avoiding noise or distortion. Feb 17, 2018 · The Design The suggested battery voltage status indicator circuit making use of 4 LEDs utilizes comparators by means of opamps from the IC LM324. Nov 20, 2023 · In the following post I have explained a simple low battery indicator circuit by using just two inexpensive NPN transistors. To get more videos check @Lifeofelectronic Battery level indicator circuit diagram: https://solderingmind. Jul 28, 2025 · Build a simple battery status indicator circuit using flashing LED to visual signal battery levels and helping you manage power efficiently. Aug 7, 2025 · Build a simple battery level indicator circuit using IC MN13811 which indicates through LED when the battery is low & when it needs charging. there is a battery level indicator in the TL431 application notes - but it probably wastes more current while the battery isn't doing much else. The setup includes multiple probes placed at different heights inside a water tank to detect water levels. The idea was requested by Mr. Different Ways to Check Battery Voltage A hydrometer is perhaps the most efficient way to examine the condition of a lead acid battery The following electronic circuit diagrams very Simple, useful, and can be made by any beginner. The LM3915 is a popular integrated circuit (IC) used in projects that require visual feedback on voltage levels. This circuit uses LEDs with transistors to indicate the water level in the tank. Dec 13, 2023 · how to make 3. It can be connected along with the existing circuit board. There are many ways to make one, you can use a 741 IC, 555 IC, 8211 IC or a SCR, but here we will learn how to make one using a transistor. It is an essential piece of Sep 30, 2025 · The simple Low Volt using LM339,can use Battery voltage monitor for voltage sources that problems, by LED display and alarm sound. 7V Battery low and full charge indicator. LED turns ON when battery voltage drops a preset level. For In this video, I will show you how to make a simple 12V battery level indicator circuit that can be created using only LEDs and resistors. Let’s make our indicator to save water with automated technology. The application of this circuit extends to various settings, including homes and factories, with A simple water level indicator circuit using LEDs and transistors (BC547) powered by a 9V battery. Firstly we have to connect 1K resistor to Base and emmiter pin of the transistor as solder in the picture. for working of circuit flawlessly. Compares detected voltage to The most widely used of all optoelectronic devices is the simple LED (light emitting diode). The BC547 is a commonly used NPN transistor that can act as a switch in this application. To resolve this type of problems by using the water level alarm circuit using transistor helps and indicated the level of water in the overhead tanks 1. Hardware Components The following components are required to make Water Level Indicator Circuit Feb 7, 2015 · Hey guys, i wanted to make a 12v battery level indicator without using an I. 6 days ago · Learn how to build a 12 Volt battery level indicator using a BC547 transistor to monitor battery voltage with LEDs. Nov 25, 2018 · Battery Status Indicator Circuit using two Transistors only Last Updated on November 25, 2018 by Admin Leave a Comment Often a backyard electronic system could become imperfect as a result of a perishing battery. Complete guide with circuit diagram, components, working principle, and troubleshooting tips. Jul 15, 2020 · This circuit can be built in a few minutes and you just need an LED, 470 ohms resistor, and any kind of battery of 5-12 volts. 7V Battery Charger CircuitWelcome to my channel "Tech help" here you will learn how electronics is work. By making this project you can learn and understand about the conducting property of water and Characteristics of Transistor BC547 (NPN). under charged and over charged. com Apr 28, 2025 · Battery level indicator using BC 547 transistor. Next solder 220 ohm resistor to collector pin of the transistor as you can see in the picture. A 24v battery level indicator is a convenient tool for monitoring the health of batteries for electric vehicles, boats, and other applications. You can make this circuit by using an LM3914 IC but that costs more than this IC, therefore we made an alternative circuit that works perfectly and costs less. Jan 28, 2022 · The circuit ‘Battery Level Indicator’ is simple, cheap, and compact. The idea was requested by Ms. It detects voltage on pin 2. This circuit display a visual bar graph of voltage level of 12v battery by 10 LED using LM3914 ic In this video, i will show you how to make a voltage level indicator using zenor diodes. 2. Simple Battery Level Indicator. 4 ADVANTAGES OF THE PROJECT Jul 16, 2022 · The working principle of a volume level indicator using a transistor circuit is as same as a VU meter (A volume unit (VU) meter or standard volume indicator (SVI) is a device displaying a representation of the signal level in audio equipment). Application and Uses We can use this 12 battery level monitor circuit to indicate the charging mechanism in 12 Volt battery devices. Aug 5, 2025 · Build a simple 3 LEDs battery status indicator circuit which takes care of batteries & ensure they work well in various electronic gadgets. basically its a battery voltage detector cum indicator circuit. Charge goes below 9. The entire circuit is built using just a couple of BJTs , a few zener diodes, resistors and LEDs. This document presents a DIY circuit that detects water levels in a tank and raises an alarm when the tank is full. This circuit doesn't contain any IC, we make this circuit only by using a transistor and few more components. This diy electronic project will guide you through the steps of creating your own indicator using a simle resistor LED circuit. 7V lithium battery full and low voltage indicator using a BC547 transistor. Three circuits were shown here are simple and built using transistors, 555 timer and ULN2003 IC. This circuit is very easy to design and can be constructed at fewer prices The water level indicator circuit consists of a transistor element and a buzzer which indicates the overflow of water or excessive water in the container. Many of battery indicator circuits are designed using 2 or more leds like in the image above but how to design a simple battery indicator circuit using only RGB LED and transistor for 12v battery indicating different voltage levels Jul 12, 2025 · In this post we will learn how to build 3 LED battery volatge level indicator circuit using LM393 for accurately monitoring battery status. Oct 16, 2022 · Water Level Indicator Circuit This water level indicator is using three PNP transistors as switch configurations. Compares detected voltage to Battery Percentage Indicator : Hii friend, Today I am going to make a Battery level indicator that will show the percentage of up-to 15V Battery. This circuit is very low-cost, it uses the TL431 integrated circuit, which costs as little as $0. Apr 14, 2020 · In this post, I will show how to construct an Arduino based battery level indicator, where a series of 6 LEDs show the level of the battery. Jun 10, 2024 · A water level indicator using a BC547 transistor is a simple and effective electronic project that helps in monitoring the water level in a tank. LED flasher circuit using transistor Battery level indicator circuit diagram Mini Fm transmitter circuit up to 50M range contactless electric line tester detect the line when the sensor wire touched over the cover of wire overheat or temperature sensor Adjust the preset to what level of temperature Build your own LED circuit battery level indicator. Jul 31, 2020 · The simple 12V battery status indicator is a circuit that shows the battery state only by flashing LEDs. Let's get started, How To Make Automatic 12V Battery Charger Circuit Welcome to my channel "Tech help" here you will learn how electronics is work. Power Supply: A 9V battery provides power to Water Level Indication Circuit consists of breadboard, NPN transistors, LED’s, resistors, 9V battery and a tank made from transparent disposable 500 ml drinking water bottle. That perfectly shows the status of the remaining battery present. Apr 12, 2008 · A simple low battery level indicator circuit with diagram and schematic using IC MN13811G and flashing LED. Circuit Components 4 – BC547 transistors 3 – 220-ohm resistors 3 – LEDs 1 – Buzzer 5 – 9v battery + battery clip/power supply some pieces of wire The connections arrangements are shown Integrated circuit MC33164-3P is heart of the level indicator. undercharged and overcharged). The first design is a 4 LED voltage monitor circuit using the versatile IC LM324. Sep 30, 2025 · These are 8 Low Battery Voltage Alarm indicator circuits, as ideas to make small projects, they use LED display easy, cheap with normal parts look below Making DIY circuits is always fun especially when you can make one using some cheap and gullible components. Mar 21, 2015 · Battery level state indicator (Designed using general-purpose NPN transistor 2N2222, indicate two states of battery i. Will this May 16, 2024 · This is four circuits of LED voltage indicator are simple and easy to builds for check voltage battery and others, use as zener,transistor,LM339 and more Aug 6, 2025 · Design a simple 12V charging indicator circuit using LEDs and transistors to visually show battery charging and full status for automotive or solar battery systems. Transistor – BC 547 Resistors- 6, 330 Ohm LEDs- 3 A simple water level indicator circuit using LEDs and transistors (BC547) powered by a 9V battery. The setup includes multiple probes placed at different heights inside a water tank to detect water Mar 21, 2015 · Hi all. C or transistors, so i got the above circuit off the internet and made a few changes to it, but somehow it doesn't work properly; all the LED's are suppose to turn on when the battery voltage reaches 12v, but only Jul 11, 2017 · A battery level indicator gives the visual indication of the battery state and so allow disconnecting it before over charging. 2: Image of a Battery A few components are sufficient to make this battery level indicator. Easy to build, Works well. On this module I decided to use zener diode and BC547 transistor for full May 2, 2022 · A Water level indicator is a simple electronic circuit that can indicate the level of any conductive liquid contained in a vessel such as a reservoir, overhead/underhead tank, or container. Nov 25, 2017 · 24v Battery Level Indicator Circuit DiagramAre you looking to build a 24-volt battery level indicator circuit? This article provides a comprehensive guide on how to construct the circuit using a simple circuit diagram. Sep 18, 2024 · Water level alarm using micro-controllers like 8051 and AVR are shown in previous articles. It can help us from any inconvenience by avoiding load sound distortion and noise and making it easy to determine sound levels. Simple Water Level Indicator Using BC547 TransistorMaterials Needed:- Bc547 transistor- Red LED light- insulated wires- 9v battery- 9v cap- solderingSubscrib Nov 20, 2023 · In this article I have explained a simple low battery indicator circuit using the IC 555 and a few resistors only. It can be used in emergency lights and other power supply circuits. It’s widely applied in devices like battery monitors, audio level meters, and power supply indicators. Methodology: The circuit utilizes the BC547 transistor as a voltage-controlled switch. 65K subscribers Subscribe This Diy Charging Indicator have two LED one for charging indicator (red led) and full charge indicator (green led). Make a simple battery voltage indicator circuit using a BC547 transistor and 1N4007 diode. 7k ohm This project demonstrates a water level indicator circuit using three BC547 transistors and three LEDs to indicate low, half, and full levels of water in a container. Here you will also learn to make diy electronics circuits,handmade Apr 5, 2020 · This is the circuit diagram of a simple corrosion free water level indicator for home and industries. Here you will al Multimeter Buzzer model by using Speaker or Buzzer and BC547 NPN - BC557 PNP Transistor 1. I need to make a battery indicator where a LED glows when the voltage is below 3. If the audio signal is Sep 22, 2020 · The circuits in this blog post are more useful for a purely analog design, especially low-noise projects. 7k ohm resistor vertically with the top end right next to the base (the middle pin) of the BC547 transistor, and the other end connecting the bottom negative rail. Friends it is a very simple circuit project and you can Dec 1, 2017 · Here is a simple circuit using transistor called ‘Battery Status Indicator Circuit’ used to indicate two states of battery i. Apr 27, 2024 · Here is the best example, Simple Water Level Indicator Circuit with Buzzer. Basic Circuit There are many ways to implement a low-battery indicator circuit. One of the best features of this circuit is that it will detect the selected level of water and inform you wirelessly to a long-distance range by transmitting a melody on your FM radio. If you are looking for ideas to build battery chargers and charge level indicator circuits, then you’re exactly in the right place. 7 Volt Lithium ion or LiPo battery charger circuit By Diy Electronic. This circuit is very easy to make and it is very cheap. can anybody please let me know if the things would work or need to change something. Circuit Concept Many electronic circuits such as emergency lights, battery chargers, UPS systems, flashlights etc essentially require a low battery indication feature in order to avoid over discharge of the involved battery. In this tutorial video you will learn how to make a Breadboard circuit that indicates battery levelThings used in this video- Breadboard Jumper wires 1k o Jun 10, 2024 · A water level indicator using a BC547 transistor is a simple and effective electronic project that helps in monitoring the water level in a tank. Here is a presentation of a variety of indicator and flasher circuits using LEDs. For example, if out of 10 six LEDs are glowing it means 60 percent of the battery power is left. The battery level is indicated by the LEDs D1 to D10. The transistor's Dec 13, 2023 · how to make 3. Water Level Indicator Step 3 Place the 4. 6V zener diode and PNP transistor. Nov 29, 2018 · Friends in this video I will show you Battery Level Indicator Circuit Without Any IC Using Transistor. 1 while the circuit’s block diagram is shown in Fig. 2v alert LED turn ON. To detect the water use two probes and attach them to your desired level in the water tank and connect the battery. Feb 16, 2022 · BC547 Npn Transistor ProjectMake a 3. 6V. First let us build a water level alarm using simple transistors. Battery level indicator using Bc 547 transistor. Water Level Indicator Using BC 547 Transistor Before starting to design the circuit, gather the following components according to the given specifications. In the video, I'll show how to build water level alarm using just a few components. This easy DIY project helps you check battery voltage levels using just a few components. This happens when rising or dropping water levels come in contact with the respective water sensors arranged step wise inside the water tank at different depths. Jul 11, 2022 · The circuit can assist with battery testing for a car, inverter, solar system, etc. When water touches a probe, it completes the circuit and activates the corresponding BC547 transistor, which allows current to flow through Aug 1, 2020 · The battery level monitor circuit can be used to indicate the required low battery level. In this post I have explained 2 interesting ways to make simple water level indicator circuits using transistors, CMOS NOT Tank Water Level Indicator: Hii friend, Today I am going to make tank water level indicator using BC547 transistor. It uses two LEDs—green to indicate full charge and red for low voltage—each This indicator is specifically used to see the left battery level. e. An over discharge could mean a permanent damage to the Mar 22, 2019 · I'd go for a 2mA high efficiency LED, use an open collector output comparator and ditch the transistor. #battery #level #indicator #circuit #led #electronic #fyp #foryou #engineering #transistor #resistor #zenerdiode #12volts Hello all, in this tutorial I will In this video, I will show you how to make a simple 12V battery level indicator circuit that can be created using only LEDs and resistors. This volume level indicator circuit uses a condenser mic to receive the audio or sound and makes the LED glow according to the sound level and power. Apr 3, 2019 · Volume Level Indicator using transistor circuit can be used as a simple VU meter, It can be used to determine sound levels and help us to avoid load sound distortion and noise. Mar 21, 2022 · In this post, a sound level indicator is built using NPN transistor BC547, LEDs, a resistor, and a condenser mic. However I didn't take into account the heat dissipation, reliability etc. As the audio input level rises, the IC lights up additional LEDs, offering a real-time visual representation of sound intensity—commonly used in audio equipment, mixers, and amplifiers for monitoring output levels. It is a low battery warning indicator circuit using op amp IC 741 and can be used for monitoring a particular low battery voltage threshold. . The circuit diagram, working and components list are provided. The circuit works by using the water in the glass to complete or break circuits, which . 7V Battery Low and Full Level Indicator Circuit : Hii friend, Today I am going to make a circuit of 3. A simple water level indicator circuit using LEDs and transistors (BC547) powered by a 9V battery. Download Circuit Diagram, PCB Layout for this project. 10 Level battery Charge Indicator Circuit (Designed using comparator IC LM3914, used to indicate the charge of a battery in 10 different levels) A Water level indicator is a simple electronic circuit that can indicate the level of any conductive liquid contained in a vessel such as a reservoir, overhead/underhead tank, or container. This battery indicator contains a circuit that determines the device battery over the glowing LED numbers and then shows it over the LCD. You can see the battery indicator in the form of bars or dots in smartphones. This circuit will show water level. Nov 16, 2018 · Fig. The setup includes multiple probes placed at different heights inside a water tank to detect water Jan 8, 2024 · In this post I have explained a simple low/normal battery voltage status indicator circuit through a flashing and a constant LED, where the flashing LED indicates a normal status while the solid indicator warns against a low battery condition. A battery level indicator is a device that provides “information about a battery”. The circuit will control the voltage of 12 and 9 V batteries and will signal when the battery level exceeds the predetermined value by triggering an LED. This is simple and very effective 12v battery level indicator circuit. May 4, 2025 · The Easiest Way to Build a Battery Indicator Circuit | Electronic Project - YouTube See full list on eleccircuit. DIY BATTERY LEVEL INDICATOR WITH CIRCUIT EXPLANATION | LM3904 EXPLAINED in this video we will see how we can make a battery level indicator for any battery that can give us the charge and Jun 19, 2020 · This Automatic battery charger circuit cuts-off power supply when the battery gets fully charged. 7V Battery Level Indicator? 3. Let's get started, Sep 24, 2022 · The post describes simple battery charge monitor circuits or battery status circuits. This is an opamp IC 741 low battery alarm indicator circuit that can be used to control a specific low battery voltage The LED will glow and display a visual indication when your battery voltage level reaches the low voltage level preset. Iphie Sthole 1 reaction Simple water level indicator circuit using LEDs and transistors Circuit world ELECTRICAL Engineer Jan 20, 2025 · The proposed 3 LED battery level indicator can be typically used for monitoring a 12 V lead acid battery charge level, through 3 distinct LED illumination. Sep 19, 2021 · In this article, we have shown a very useful, cheap and simple water level indicator circuit using transistors (bc547) for beginners. The basic principle is that we… Feb 10, 2021 · Using basic components such as a transistor, diode, and some resistors, you can create a battery charging indicator circuit diagram that will alert you when the battery's charge is running low. Jun 11, 2022 · By connecting this simple 24V/12V battery voltage level indicator circuit across the battery, you can check its voltage level any time. We are using this simple circuit ‘battery level indicator’ for over a year and has found it works well in emergency light as well as battery charger circuit. Apr 26, 2012 · A water level indicator is an electronic circuit which indicates the various levels of water inside a tank. 7v battery level indicator using bc547 transistor Today I am going to make a circuit of 3. Sep 10, 2025 · conditioning, and a direct audio input connection. Dec 21, 2024 · Water Level Indicator Using Transistors or BJTs You probably already know that undistilled water can conduct electricity, but it does so with a bit of resistance. Pnp wants 0v at base (I will adjust the voltage divider to get middle voltage 0 when battery is 3v ) so it only lights up when battery is empty . This circuit is constructed by using only four Transistors and Indicator devices like Buzzer and LED. Circuit Operation The circuit may be understood with the following points: Jun 10, 2023 · We will discuss here the process of how to make a battery level indicator diy using LM324 IC which is affordable and easy to build. Jul 29, 2020 · Here is a basic circuit battery voltage monitor used to track it to show the battery status. In this project we have used 4 zenor diodes of different powers to make a perfect voltage level indicator Feb 17, 2025 · The proposed circuit was requested by one of the avid readers of my blog. LED blinks when a related transistor gets to its base point through water level variation. What is 3. i have attached a circuit diagram of battery indicator using 3. Piyali. It details the components, circuit diagram, construction, and working principles of the water level indicator, which uses LEDs and a buzzer to signal different water levels. The main feature of this circuit is its very low stand by current consumption. This circuit can charge any battery like Li-Po, Lead Acid, or Ni-Cd if you set it properly. In fact, the level of any conductive non-corrosive liquids can be measured using this circuit. Apr 11, 2020 · I want a simple, low power dissipation circuit which would be connected to the arduino to monitor this battery level Previously for one of my projects I have used a simple zener diode to monitor the battery level. Let's get started, In the first circuit, we are using the BC 547 transistor as the main part and in the second circuit, ULN2003 IC is playing the major role. The circuit will visually display the battery's charge level through an LED, providing a clear indication of its remaining power. In the case of a 12V battery level indicator, the circuit diagram may include a voltage divider consisting of resistors, LEDs to indicate the battery levels, and a transistor or an op-amp for amplification. “Simple Water Level Indicator Circuit Using BC547 Transistors | DIY Electronics Project” This is a simple water level indicator circuit using BC547 transistors, LEDs, and resistors to monitor Oct 18, 2022 · So Hey guys in today's article I am going to teach you how to make 3. In this tutorial video you will learn how to make a Breadboard circuit that indicates battery levelThings used in this video- Breadboard Jumper wires 1k o Jul 30, 2024 · This circuit’s power source is derived from the input battery supply. MC33164 is designed as reset circuit for microprocessor, in case of power drop. The battery is a small li-ion 3 V cell. Nov 16, 2015 · Components Required for Water Level Indicator Circuit 4 - BC547 transistors 6 - 220 ohm resistors 3 - Colour LEDs - red, green, and yellow 1 – Buzzer 5 - 9v battery + battery clip Breadboard Water Level Indicator Circuit Diagram with Alarm This transistor-based water level indicator circuit is highly effective for monitoring water levels in tanks and containers. here, we will be following a simple transistor-switching technique. If you are interested in monitoring and maintenance of your 12V battery, this circuit might become handy. Why Battery Level Monitoring is Crucial All batteries have certain voltage limit to discharge, if it goes beyond the prescribed limit, the life span @MMtechno88 Simple Water Level Indicator Using with BC 547 Transistor School Project Simple Circuit Projects of Beginners Used Components BC 547 Transistor 1 K Resistor LED s Buzzer Oct 2, 2017 · The entire circuit of is 10 Level Battery Charge Indicator Circuit built around comparator IC LM3914, 10 LEDs and few other electronics components like resistors, capacitors, diodes, transistor etc. 1K views 2 years ago This project report describes a water level indicator circuit that can monitor and indicate the level of water in an overhead tank. Simple description of circuit: It is micropower under voltage sensing IC, in three pins plastic package, similar to low power transistor. Low Battery Voltage Indicator: In this instructuble you'll learn how to make a low battery voltage indicator. Technical Specifications I've a project, if you could help me out: 1. Jan 1, 2023 · How to Make 100% Accurate 12V Battery Level Indicator Circuit #12vbattery Required Components :- 1) BC547 Transistor x 3 2) Red LED x 1 3) Green LED x 1 4) Yellow LED x 1 5) 1K Resistor x 3 6) 10K Jan 1, 2023 · How to Make 100% Accurate 12V Battery Level Indicator Circuit #12vbattery Required Components :- 1) BC547 Transistor x 3 2) Red LED x 1 3) Green LED x 1 4) Yellow LED x 1 5) 1K Resistor x 3 6) 10K 3. There are a number of electronic configurations available for achieving this function. When the power is switched on and if the battery is holding 6 volts, both Red and Green LEDs light. Aug 18, 2024 · Battery Voltage Monitor- In this tutorial, you will learn how to display the percentage of charge available in the battery using LEDs. When the water reaches to maximum limit it shows and blinks the LED with buzzer sound to stop pouring or filling water. 7V Battery low and full charge indic Sep 13, 2017 · The water level indicator circuit diagram using BC547 is a simple, low-cost solution for monitoring the water level in a tank or any other container. here, we will be following a simple transistor switching technique. Abstract: Battery Level Indicator Using BC547 Transistor Objective: To design and implement a simple battery level indicator circuit using a BC547 transistor. Feb 18, 2024 · Referring to the above circuit diagram, it works like a DC power supply failure indicator using a single transistor, LED and a battery backup. This circuit consists of a power supply, a microcontroller, a pair of transistors (BC 547) and a few other components. Red LED indicates that the emergency lamp is on. This article shows simple circuits of water level indicator with alarm. WATER LEVEL INDICATOR Explanation: This diagram shows an electronic circuit for monitoring the water level inside a water tank using LEDs as indicators. Author’s circuit on breadboard for 24V/12V Battery Voltage level indicator The author’s circuit rigged on a breadboard is shown in Fig. All you need is an LED light, battery, and a circuit, and you can make almost 6 Jun 23, 2020 · In this DIY, we are developing the project of a “3. The water level sensor Feb 5, 2024 · Learn how to make a battery level indicator with a transistor bc547! This simple DIY project will help you monitor the charge of your lithium battery and ensure it never runs out of juice. Jul 12, 2025 · Learn how to build a simple adjustable low battery indicator circuit to indicate a low battery situation for any connected battery. Technical Specifications Hi, I found and built your “ Low Battery Indicator Circuit Using Two Transistors Only Nov 8, 2021 · Make Water Level Indicator with Buzzer using only BC547 transistor on Zero PCB. Towards the end of This project demonstrates a water level indicator circuit using three BC547 transistors and three LEDs to indicate low, half, and full levels of water in a container. Jun 13, 2020 · Water Level Indicator Circuit using BC547 Transistor Here is a simple BC547 transistor-based water level indicator circuit with 3 LEDs, 6 220Ω, Buzzer and a 9V battery. There are two main components in making battery level indicators which are transistor BC548 and diode 1N4007. The circuit is based on 5 transistor switches. No IC | No Transistor | Automatic 3. In this tutorial, we are making a good quality LM324 Battery monitor. Alf. Towards the end of If you use a knife, treat it with caution. Detailed information for this component is here. Each LED has a label indicating the battery voltage at that time. The circuit is built in a few simple steps and is used for the indication of different sound levels using the LEDs. You can make a simple battery charger circuit using some common ICs. 10 in quantities of a few hundred. Jul 18, 2020 · Today we are going to demonstrate a very useful project of a Wireless water level indicator circuit. This is a simple but very reliable water level indicator alarm, aka flood sensor. Car battery monitor circuit using 4 LEDs This simple Car battery monitor, allow us to know the voltage of the battery at all times. idlhifjiazytypewjpfnbxiqdzpbxjzljldoepddhzpnmucffehywjeqnvxvnrjumassrjh