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Capacitive

Simple Capacitive Discharge Ignition (CDI) Circuit

Last Updated on October 28, 2025 by Swagatam 337 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. For an audio/video explanation, you can watch the following video representation: How Ignition System in Vehicles Work The ignition process in any vehicle […]

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

3 Easy Capacitive Proximity Sensor Circuits Explored

Last Updated on January 19, 2025 by Swagatam 61 Comments

features 1

In this post I will comprehensively discuss a 3 basic proximity sensor circuits with many application circuits and detailed features of the circuit. The first two capacitive proximity sensor circuits uses a simple IC 741 and IC 555 based concepts, while the last one is a bit more accurate and incorporates a precision IC PCF8883 […]

Filed Under: Sensors and Detectors Tagged With: Capacitive, Circuits, Easy, Explored, Proximity, Sensor

How to Use TTP223 Capacitive Touch Switch Module [Pinouts Explained]

Last Updated on February 1, 2024 by Swagatam 80 Comments

TTP223 touch pad side compressed

In this article I have explained how to connect and use the TTP223 capacitive touch switch module. These modules work using 2.5V to 5V. They are all pre-debounced, all you need is to provide the DC supply across the VC and GND terminals, and you get an output in the middle. So it is really […]

Filed Under: Sensors and Detectors Tagged With: Capacitive, Module, Pinouts, Switch, Touch, TTP223

Contactless Sensors – Infrared, Temperature/Humidity, Capacitive, Light

Last Updated on May 8, 2022 by Swagatam 9 Comments

In this article I have explained a few highly advanced contactles sensors such as infrared sensor, temperature sensor, humidity sensor, light sensor which can be used for crucial and sensitive industrial applications, and manufacturing plants. Texas Instruments (TI) introduced the growth of its industry-leading sensing integrated circuits with the inclusion of 4 innovative products that […]

Filed Under: Sensors and Detectors Tagged With: Capacitive, Contactless, Humidity, Infrared, Sensors, Temperature

Capacitive Fluid Meter Circuit for Sealed Tanks

Last Updated on April 11, 2021 by Swagatam 5 Comments

capacitive fluid meter circuit compressed

At times it becomes important to determine the amount of water inside a sealed tank, by employing a stationery sensor. A sensible remedy to the issue is to make use of a cylindrical capacitor concept. One plate of the capacitor is created with the liquid surrounding an insulated conductor, where insulation of the conductor works […]

Filed Under: Water Controller Tagged With: Capacitive, Fluid, Meter, Sealed, Tanks

Electronic 12V DC Capacitive Discharge Ignition (CDI) Circuits

Last Updated on February 16, 2021 by Swagatam 304 Comments

enhanced CDI

In the following post I have explained a simple yet enhanced 12V capacitive discharge ignition system which derives its operating voltage from the battery instead of the alternator for generating the igniting sparks. Since it works independently from the alternator voltage, without depending on a pickup coil signal, it is able to function more efficiently […]

Filed Under: Automobile Electronics Tagged With: 12V, Capacitive, DC, Discharge, Electronic, Ignition

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