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Newly Updated Circuit Projects:

Rotating LED Chakra Circuit for God Idols

Last Updated on July 7, 2026 by Swagatam 20 Comments

rotating chakra using LEDs

LED Chakra is an ornamental lighting system which depicts or imitates a rotating wheel like appearance, by means of sequentially shifting Illuminated LED arrays. Indian subcontinent is a land of festivals and celebrations which mostly start from the month of August and continues until the New Year. All these festivals have one fundamental thing in […]

Filed Under: Lamps and Lights Tagged With: Chakra, Idols, LED, Rotating

Adjustable CDI Spark Advance/Retard Circuit

Last Updated on July 1, 2026 by Swagatam 66 Comments

advance2Bretard2Bignition2Bcircuit

In this post we’ll learn about a simple circuit which allows a manual adjust feature for the spark timing of a motorcycle’s CDI either to achieve an advance ignition, retarded ignition or simply a normal timed ignitions. After a comprehensive study regarding the subject I was apparently successful in designing this circuit which can be […]

Filed Under: Automobile Electronics Tagged With: Adjustable, Advance, CDI, Retard, spark

18650 2600mAh Battery Datasheet and Circuit Diagram

Last Updated on June 30, 2026 by Swagatam 43 Comments

718777204 109

In this article I will try to explain the main specifications and datasheet of the Li-Ion cell 18650 2600 mAh, which is one of the most popular Li-ion batteries, and preferred by all electronic professionals due to its high efficiency, in terms power delivery and compact dimensions. Li-Ion batteries are one of the most advanced […]

Filed Under: Datasheets and Components Tagged With: 18650, 2600mAh, Battery, Datasheet

IC LM321 Datasheet – IC 741 Equivalent

Last Updated on June 30, 2026 by Swagatam 14 Comments

lm321

The IC LM321 is the single op amp version of LM324 which is a quad op amp IC and carries 4 of these ICs in one package. Therefore for applications which demand a single op amp with the attributes of the versatile LM324, in such cases this single op amp can be utilized effectively. For […]

Filed Under: Datasheets and Components Tagged With: 741, Datasheet, Equivalent, LM321

400V 40A Darlington Power Transistor Datasheet Specifications: MJ10022, MJ10023

Last Updated on June 30, 2026 by Swagatam 6 Comments

dissipation graph

In this post we investigate the datasheet and technical specifications of a 400V, 40A (ampere) power Darlington transistor MJ10022 and MJ10023, and also learn the main features of the device. We mostly find it difficult when it comes to finding a BJT with extreme voltage and current specifications such as with a 400V and 40 […]

Filed Under: Datasheets and Components Tagged With: 400V, 40A, Darlington, Datasheet, Power, Transistor

55V 110A N-Channel Mosfet IRF3205 Datasheet

Last Updated on June 30, 2026 by Swagatam 40 Comments

The following post explains the main features of mosfet IRF3205 which is fundamentally rated with drain current at a massive 110 Amps, and voltage ranging up to 55V, ideally suitable for inverter, motor control, choppers, and converter applications. Main Features The IRF3205 leading-edge N-Channel HEXFET® Power MOSFETs from International Rectifier implements hi-tech processing solutions to attain incredibly […]

Filed Under: Datasheets and Components Tagged With: 110A, 55V, Channel, Datasheet, IRF3205, MOSFET

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