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 […]
Indicator Circuits
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Arduino Based Electronic Voting Machine Circuit
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 […]
Water Quality Test Circuit using Arduino and Turbidity Sensor
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 […]
Dual LED Temperature Indicator Circuit
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 […]
Electronic Coin Toss Circuit using IC 555 and JK Flip-Flop
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 […]
Electronic Game Scorer Circuit
This circuit is called Electronic Game Scorer Circuit. It uses 555 timer IC and 74LS192 counter, 74LS247 decoder and 7-segment display. When player presses the button the circuit counts the score. Each press increases the number on display. So it is easy to keep score in game without writing. Circuit Working: Parts List: Component Value […]