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New Circuit Projects

Footsteps Detector Circuit

Last Updated on August 1, 2023 by Swagatam Leave a Comment

footsteps detector sensor circuit using a loudspeaker

By sensing vibrations from footfall, a Footsteps Detector Circuit is a creative and affordable approach for catching intruders. It employs a simple setup with a low-cost loudspeaker and a mute switch to pick up even the smallest steps. This simple circuit is excellent for enhancing building and garden security. We’ll go through the fundamental components […]

Filed Under: Security and Alarm, Sensors and Detectors Tagged With: Detector, Footsteps

How to Modify a Transformer

Last Updated on January 23, 2024 by Swagatam 16 Comments

Commonly, the perfect transformer might not be readily accessible for purchase, or if it is available, it can be costly. Nonetheless, there is a possibility of modifying the transformer’s secondary winding, especially when producing small voltage and current outputs. This approach can provide a highly cost-effective solution for creating a customized power supply. Transformer Power […]

Filed Under: Power Supply Circuits Tagged With: Modify, Transformer

Battery Low Voltage Alarm Circuit

Last Updated on January 3, 2024 by Swagatam 4 Comments

table 1

Despite its simplicity, the Battery Low Voltage Alarm circuit has a very important function. It forewarns you of approaching battery failure so that you may run to the store and get replacement cells before your equipment stops functioning entirely. Because of its compact size and low current need, it may be integrated into the devices […]

Filed Under: Security and Alarm Tagged With: Alarm, Battery, Voltage

How to Connect LM338 IC in Parallel to Increase Output Current

Last Updated on July 26, 2023 by Swagatam 20 Comments

how to connect LM338 in parallel for increased current output

The LM338 is an adjustable 3-terminal positive voltage regulator capable of providing up to 5 amperes of output current. To increase the output current capability, you can connect multiple LM338 ICs in parallel. When you connect them in parallel, each IC will share the load current, allowing you to achieve higher total current handling capacity. […]

Filed Under: Power Supply Circuits Tagged With: Connect, Current, Increase, LM338, Output, Parallel

12 Amp Power Supply Circuit using Parallel LM317 ICs

Last Updated on January 18, 2025 by Swagatam 4 Comments

LM317 parallel 12 amp power supply circuit

This adjustable power supply is capable of delivering a maximum output of 12 A with an adjustable voltage from 4 V to 20 V through many LM317 ICs connected in parallel. It will allow testing of any device requiring a significant power supply, such as a direct current motor, a car amplifier, or even a […]

Filed Under: Power Supply Circuits Tagged With: LM317, Parallel, Power, Supply

LED Arrow Direction Indicator Circuit

Last Updated on July 19, 2023 by Swagatam Leave a Comment

LED direction indicator circuit

The arrow-shaped LED direction indicator circuit utilizing the 74LS164 based IC and a configuration of 14 LEDs arranged in the shape of an arrow is a captivating and visually appealing project designed to create an eye-catching display. This circuit is designed to illuminate the LEDs gradually, forming the shape of an arrow, and once the […]

Filed Under: Lamps and Lights Tagged With: Arrow, Direction, Indicator, LED

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