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CDI

Make this DC CDI Circuit for Motorcycles

Last Updated on June 24, 2019 by Swagatam 173 Comments

DC CDIdualchannel

The circuit presented here is for a DC-CDI which are used in motorcycles. A DC-CDI is the one in which the high voltage (200-400VDC) is converted from 12V supply voltage. Researched and Submitted by: Abu-Hafss Studying the circuit, we see that it has two parts i.e. the CDI unit, enclosed in the pink box and […]

Filed Under: Automobile Electronics Tagged With: CDI, DC, Motorcycles

CDI Tester Circuit for Automobiles

Last Updated on July 6, 2019 by Swagatam 47 Comments

SparkGap

The circuit presented here is a tester circuit for testing CDIs for motorcycles and three-wheelers.   Designed and Written By: Abu-Hafss Basically there are 2 types of CDIs: Technical Specifications a) AC CDI, in which the HVAC (about 180V) is obtained from the source coil inside the magneto housing. b) DC CDI, in which the […]

Filed Under: Automobile Electronics Tagged With: Automobiles, CDI, Tester

Adjustable CDI Spark Advance/Retard Circuit

Last Updated on April 23, 2021 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

Multi-spark CDI Circuit

Last Updated on November 17, 2020 by Swagatam 103 Comments

multispark cdi circuit

In this post I have explained an enhanced multi-spark CDI circuit which is universally suited for all types of automobiles. The unit can be built at home and installed in a particular vehicle for achieving greater speed to fuel efficiency. The Circuit Concept The following diagram illustrates an enhanced version of a multi-spark CDI circuit. […]

Filed Under: Automobile Electronics Tagged With: CDI, Multi, spark

Simple Capacitive Discharge Ignition (CDI) Circuit

Last Updated on February 12, 2025 by Swagatam 329 Comments

cdi

In this post I have explained the circuit for a simple, universal capacitive discharge ignition circuit or a CDI circuit using a standard ignition coil and a solid state SCR based circuit. How Ignition System in Vehicles Work The ignition process in any vehicle becomes the heart of the entire system as without this stage […]

Filed Under: Automobile Electronics Tagged With: Capacitive, CDI, Discharge, Ignition, Simple

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