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Newly Updated Circuit Projects:

3-Pin Solid-State Car Turn Indicator Flasher Circuit – Transistorized

Last Updated on May 16, 2026 by Swagatam 6 Comments

car solid state flasher unit

Although, most of the car electronics have evolved into solid-sate versions, a turn indicator flasher unit is one device which still depend on a relay based design in many of the modern cars. Disadvantages of Relay Based Flasher There are a couple major disadvantages of a relay based electromechanical flasher unit: 1) First, these being […]

Filed Under: Automobile Electronics Tagged With: Flasher, Indicator, Solid, State, Transistorized, Turn

4 Solid-State Car Alternator Regulator Circuits Explored

Last Updated on May 16, 2026 by Swagatam 89 Comments

car voltage regulator circuit

The 4 simple car voltage current regulator circuits I have explained below is created as a immediate alternative to any standard regulator and, although developed principally for a dynamo it will function equally effectively with an alternator. If the functioning of a traditional car alternator voltage regulator is analyzed, we find it amazing that these […]

Filed Under: Automobile Electronics Tagged With: Alternator, Circuits, Explored, Regulator, Solid, State

Simple Mini Audio Amplifier Circuits

Last Updated on May 15, 2026 by Swagatam 22 Comments

1 watt transistor amplifier

In this article we are discussing a handful of simple, mini audio amplifier circuits which can be built quickly for amplifying very tiny input signals into audible speaker outputs. 1) 1 Watt Amplifier Circuit The first simple mini audio amplifier circuit works with a ‘complementary’ output stage, having a single NPN and a single PNP […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Audio, Circuits, Mini, Simple

Simple Low Dropout Regulator Circuits Explained

Last Updated on May 3, 2026 by Swagatam 70 Comments

5V LDO

The transistorized low dropout voltage regulator circuit ideas explained in the following article can be used for getting stabilized output voltages right from 3 V and above, such as 5 V, 8 V, 9 V, 12 V, etc with an extremely low dropout of 0.1 V. For example, if you make the proposed 5 V […]

Filed Under: Power Supply Circuits Tagged With: Circuits, Dropout, Explained, Regulator, Simple

110 V to 310 V Converter Circuit

Last Updated on July 5, 2025 by Swagatam 11 Comments

110 V to 220 V converter device

The discussed circuit is a solid state AC to DC voltage converter that will convert any AC input between 85 V and 250 V into a constant 310 V DC output. This kind of circuits are normally use in LCD TV sets for operating the system through inputs from 100 V AC to 250 AC. […]

Filed Under: SMPS and Converters Tagged With: 110, 310, Converter

Face Mask with UVC Disinfected Fresh Air

Last Updated on May 24, 2026 by Swagatam 3 Comments

covid disinfection for masks

Face masks have so far proved to be the most effective first line of defense against all contagious epidemics and pandemics. However, the biggest discomfort with face masks is the difficulty in breathing and accessing fresh air. On the other hand, if the masks are made porous for letting fresh air in could also allowing […]

Filed Under: Health related Projects Tagged With: Disinfected, Face, Fresh, Mask, UVC

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