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Indicator Circuits

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Simple Battery Level Indicator Circuit

Last updated on 14 October 2025 by Admin-Lavi Leave a Comment

No More Dead Battery! Battery gone down? having no idea? This Simple Battery Level Indicator Circuit can show battery level. Easy to make, cheap and works fast. Know when battery is full or low. Good for beginners and DIY lovers. Circuit Working: Parts List: Component Value / Type Quantity Resistors 2.2k 1/4 watt 1 680Ω […]

Filed Under: Battery Charger Circuits, Indicator Circuits

LED Binary Counter Circuit

Last updated on 26 September 2025 by Admin-Lavi Leave a Comment

This project is for LED Binary Counter Circuit It uses IC 555 timer as clock pulse generator. And it uses 74HC4040 binary counter IC. LEDs are connected to output which show binary count. It works from 6V battery or DC supply. Circuit Working: Parts List: Component Value Quantity Resistors 1k 2 10k 1 220Ω 1 […]

Filed Under: Indicator Circuits, LED and Lamps, Timer Circuits

Arduino Based Electronic Voting Machine Circuit

Last updated on 19 September 2025 by Admin-Lavi Leave a Comment

This project makes simple Arduino Based Electronic Voting Machine Circuit. It takes votes from push buttons. It shows result on LCD display. This circuit is good for school or college mini projects. Easy to build and is with low cost. Circuit Coding: Coding Explanation: Circuit Working: Parts List: Component Quantity Potentiometer 10k 1 Arduino Uno […]

Filed Under: Arduino Projects, Indicator Circuits

Water Quality Test Circuit using Arduino and Turbidity Sensor

Last updated on 11 September 2025 by Admin-Lavi Leave a Comment

Water looks clean but can hide dirt we cannot see. Tiny dust, clay and silt make water cloudy. This cloudy thing is called turbidity. More turbidity means more dirt and bad water. Less turbidity means clean and safe water. This project uses Arduino and turbidity sensor to check water. It shows result on LCD and […]

Filed Under: Arduino Projects, Indicator Circuits, Sensors and Detectors

Dual LED Temperature Indicator Circuit

Last updated on 12 August 2025 by Admin-Lavi Leave a Comment

Dual LED Temperature Indicator Circuit light one LED when hot and other when cold. It uses IC LM35 temperature sensor, CA3130 op-amp and two BC547 transistors. IC 7805 change 9V to steady 5V and if there is 5V already then we can connect directly. IC LM35 gives 10mV more for every 1°C rise. Output goes […]

Filed Under: Heater and Temperature Controllers, Indicator Circuits

Electronic Coin Toss Circuit using IC 555 and JK Flip-Flop

Last updated on 13 August 2025 by Admin-Lavi Leave a Comment

Many times people make choice by flipping coin. But this method is not always fair but sometimes it give biased result. To fix this we can use Electronic Coin Toss Circuit using IC 555 and JK Flip-Flop. It works like real coin flip using digital technology and LED. This circuit has two main parts: In […]

Filed Under: Indicator Circuits

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