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Newly Updated Circuit Projects:

Monitoring 220V AC Load Current using Current Transformer [Circuit Diagram]

Last Updated on June 25, 2026 by Swagatam 36 Comments

current sensing transformer

In this post I have explained a circuit which can be used for monitoring or controlling AC 220V load current by sensing the load current through a contactless current transformer. Figure 1 below depicts a circuit diagram designed for a non contact load current sensing through a current transformer, which seemed to work well. It is […]

Filed Under: Security and Alarm Tagged With: 220V, AC, Current, Load, Monitoring, Transformer

Listen to Wildlife and Insects with this Circuit

Last Updated on May 15, 2026 by Swagatam 2 Comments

mic encosure insode soft pipe construction

In this post I have explained a simple circuit idea which can be used for listening to the amplified sounds of insects and bugs in gardens, trees, or any deserted, quite backyards. Listening to the noises of outdoor wildlife may be a genuine auditory delight as well as a signal of impending danger. When it […]

Filed Under: Audio and Amplifier Projects Tagged With: Insects, Listen, Wildlife

Different Types of UPS systems – Explained

Last Updated on January 3, 2024 by Swagatam 9 Comments

online UpS flow chart

In this post I am going to explain different types of uninterruptible power supply (UPS) that are available in the market and how they are classified according to the consumer’s requirement. We will also explore the different types of UPS’s block diagram to understand their technical difference between them. UPS systems are a type of […]

Filed Under: Inverter Circuits Tagged With: Different, Explained, systems, Types, UPS

Clipper and Clamper Circuits Explained  

Last Updated on May 20, 2026 by Swagatam Leave a Comment

waveform clipping

In this post I am going to explain clipper and clamper circuits. The clipper and clamper are called wave shaping circuits because they convert the incoming signal wave to another kind of useful wave. They are used widely in power supplies, filter circuits, RF transmitters / receivers, voltage suppressors, audio amplifiers and the list goes […]

Filed Under: Electronics Theory Tagged With: Circuits, Clamper, Clipper, Explained

Gel Cell Battery Charger Circuit [Constant Current, Constant Voltage]

Last Updated on May 17, 2026 by Swagatam 42 Comments

Fig 1

In this post I have explained what are gel cell batteries and also learn how to build a specialized charger for charging a gel cell battery, with full calculations. The proposed circuit works in two modes: it starts charging a discharged gel cell battery with constant current, until the full charge voltage is reached across […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Cell, Charger, Constant, Current, Voltage

Simple E-Bike Circuit [Electric Bike]

Last Updated on May 16, 2026 by Swagatam 25 Comments

thumb press accelerator

This E-bike or electric bike circuit I have explained below can be used as the control circuit for constructing a homemade E-bike, with the help of a permanent magnet motor DC (PMDC motor), and a Li-Ion battery. An electric bike is basically a bicycle powered through a motor and a battery, which does not require […]

Filed Under: Automobile Electronics Tagged With: Bike, Electric, Simple

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