In this project, we developed an Arduino based heartbeat monitor that uses a sensor that monitors heartbeats when your finger is placed on it to count heartbeats per minute. This is significant because your heartbeat provides information to doctors about your health. Heartbeat Monitor Circuit uses components like Arduino UNO, an LCD display, two push […]
Indicator Circuits
Interfacing a 7-Segment Display Circuit with Arduino UNO
A 7-segment display is a typical electrical component that displays numerical digits. It is made up of seven LEDs grouped in a certain way to represent numerals and basic alphabets. Interfacing it with an Arduino allows us to programmatically control the displayed digits. This tutorial will walk you through the steps of attaching a 7-segment […]
Simple Battery Status Indicator Circuit using Flashing LED
Monitoring battery charge levels may be done efficiently using a simple circuit that uses flashing LEDs as a battery status indicator. A BC547 and BC557 transistor are used in this circuit, along with resistors, capacitors, a diode and an LED. The circuit uses an LED to visually indicate the batteries condition by creating a pattern […]
Simple Audio Level Indicator Circuit using IC LM3915
The LM3915 integrated circuit is used in an audio level indicator circuit that shows the audio signals strength graphically. A flexible analog display driver integrated circuit intended for use in audio level visualizers and related applications is the LM3915. Using an analog voltage input, it can drive up to ten LEDs, LCDs or other types […]
Simple Decimal Counter Circuit
Instead of counting events in binary (0 to 1), a simple decimal counter circuit counts events in base-10 (0 to 9). To create one, there is just one primary method: Employing an IC Decade Counter: This method is better suitable for beginners. Dedicated decimal counting IC such as the 4017 are easily obtainable and comprise […]
Automobile Brake Failure Indicator Circuit
A automobile brake failure indication circuit is a backup system meant to alert drivers of any issues with their cars braking system. Usually, it monitors the brakes using electrical components alerting the user with an aural or visual signal if a problem is found. Only automobiles having negative grounding will be able to use the […]