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Newly Updated Circuit Projects:

Switching Boost Converter Circuit using IC MAX732

Last Updated on January 8, 2024 by Swagatam Leave a Comment

MAZ 732 switching boost converter circuit

The proposed boost converter circuit using MAX732 IC will allow you to have a continuous voltage of 12V with a current of 150 or 200 mA. The input voltage can be between 4.5 to 9 V, which can be produced by three 1.5V batteries, for example. The circuit is quite simple, we will be using […]

Filed Under: Power Supply Circuits Tagged With: Boost, Converter, MAX732, Switching

Simple LED Forward Voltage Drop Tester Circuit

Last Updated on August 10, 2026 by Swagatam Leave a Comment

amber LED testing

Semiconductor LEDs (Light Emitting Diodes) produce light when current flows through them. In comparison to conventional lighting sources, LEDs offer a number of benefits, including high energy efficiency, extended longevity, and low thermal output. The forward voltage drop of an LED is one of the important factors that affects how well leds performs. We will […]

Filed Under: Meters and Testers Tagged With: Drop, Forward, LED, Simple, Tester, Voltage

Using Electret Microphone on Computer PC

Last Updated on May 15, 2026 by Swagatam Leave a Comment

how to use electret MIC with computer

The small circuit that we propose here provides a 20 dB gain to the microphone signal, which will finally allow you to effectively use an electret microphone on your PC. Circuit Description The diagram of our circuit is reproduced in the Figure below. Don’t expect a complicated diagram with op-amps everywhere, as our circuit is […]

Filed Under: Audio and Amplifier Projects Tagged With: Computer, Electret, Microphone, PC

75 Watt Power Amplifier Circuit

Last Updated on May 16, 2026 by Swagatam 5 Comments

75 watt amplifier circuit

Our power amplifier only uses a handful of widely available and inexpensive components. Despite this, it can deliver an effective power output of 50 W into an 8 ohm load or 75 W into a 4 ohm load. If distortion is below 0.3% at these maximum power levels, it drops to less than 0.01% from […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Power, Watt

Shock Vibration Detector Circuit using 801S Sensor

Last Updated on July 17, 2023 by Swagatam 3 Comments

basic shock detector using 801S

The shock alarm module that we are presenting to you can be used in a house as well as in a car. Given its low manufacturing cost, it can be replicated in several copies and connected to different positions at home. It can be also installed in a vehicle where it will trigger a siren […]

Filed Under: Security and Alarm, Sensors and Detectors Tagged With: 801S, Detector, Sensor, Shock, Vibration

Mains AC Current Detector Switch Circuit

Last Updated on May 1, 2023 by Swagatam 4 Comments

current transformer prototype image

The circuit I have I have explained in this article allows one to detect the current consumed by a device and to power one or more other devices accordingly. Indeed, the solution of a switchboard is not always applicable because it is often not very practical. Furthermore, some devices such as computers only start when […]

Filed Under: Sensors and Detectors Tagged With: AC, Current, Detector, Mains, Switch

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