Electronics Area https://electronicsarea.com Electrical and Electronics Tutorials and Circuits Wed, 17 Jun 2026 21:43:53 +0000 en-US hourly 1 https://wordpress.org/?v=4.9.26 Diode Connected in Parallel to a Relay Coil – Relay diode https://electronicsarea.com/diode-connected-in-parallel-to-a-relay/ https://electronicsarea.com/diode-connected-in-parallel-to-a-relay/#respond Mon, 08 Jun 2026 19:19:29 +0000 https://electronicsarea.com/?p=4958 Purpose of the diode connected in parallel to a relay coil. Characteristics the diode should have. Example of operation: the relay is energized and de-energized.

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]]> https://electronicsarea.com/diode-connected-in-parallel-to-a-relay/feed/ 0 Doorbell for Deaf People Circuit using LEDs https://electronicsarea.com/doorbell-for-deaf-people-circuit/ https://electronicsarea.com/doorbell-for-deaf-people-circuit/#respond Sun, 07 Jun 2026 15:30:40 +0000 http://electronicsarea.com/?p=1208 Why use a doorbell for deaf people? A visual warning signal for a deaf person to know someone is knocking at the door. How the circuit works. List of parts.

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The post Doorbell for Deaf People Circuit using LEDs appeared first on Electronics Area.

]]> https://electronicsarea.com/doorbell-for-deaf-people-circuit/feed/ 0 Dielectric Constant & Capacitors (Table) https://electronicsarea.com/dielectric-constant-relative-permittivity-capacitor/ https://electronicsarea.com/dielectric-constant-relative-permittivity-capacitor/#respond Tue, 02 Jun 2026 17:38:10 +0000 https://electronicsarea.com/?p=6184 What is the Dielectric constant / Relative Permittivity? The dielectric constant is the ratio of the permittivity of a substance to the permittivity of free space. It is a dimensionless physical constant

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The post Dielectric Constant & Capacitors (Table) appeared first on Electronics Area.

]]> https://electronicsarea.com/dielectric-constant-relative-permittivity-capacitor/feed/ 0 Binary Number System – Decimal to Binary & vice versa – Videos https://electronicsarea.com/binary-number-system/ https://electronicsarea.com/binary-number-system/#respond Mon, 01 Jun 2026 16:52:33 +0000 http://electronicsarea.com/?p=1274 The binary number system only needs two (2) digits: "0" and "1". How to make the decimal to binary and binary to decimal conversion.

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The post Binary Number System – Decimal to Binary & vice versa – Videos appeared first on Electronics Area.

]]> https://electronicsarea.com/binary-number-system/feed/ 0 MOSFET Transistors – NMOS, PMOS https://electronicsarea.com/mosfet-transistors/ https://electronicsarea.com/mosfet-transistors/#respond Thu, 28 May 2026 21:00:45 +0000 http://electronicsarea.com/?p=437 MOSFET transistors, or Metal Oxide-Semiconductor (MOS), are field effect devices that use the electric field to create a conduction channel. MOSFET transistors are more important than JFETs because almost all integrated circuits are built with MOS technology.

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]]> https://electronicsarea.com/mosfet-transistors/feed/ 0 LM317 Variable Voltage Regulator Tutorial https://electronicsarea.com/lm317-variable-voltage-regulator-circuit-diagram/ https://electronicsarea.com/lm317-variable-voltage-regulator-circuit-diagram/#respond Mon, 25 May 2026 17:28:51 +0000 https://electronicsarea.com/?p=4193 LM317 characteristics. How the voltage regulator circuit works: Regulator circuit operation improvement

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The post LM317 Variable Voltage Regulator Tutorial appeared first on Electronics Area.

]]> https://electronicsarea.com/lm317-variable-voltage-regulator-circuit-diagram/feed/ 0 Adding a Tweeter to a Speaker https://electronicsarea.com/add-tweeter-baffle-speaker/ https://electronicsarea.com/add-tweeter-baffle-speaker/#respond Mon, 25 May 2026 17:26:50 +0000 https://electronicsarea.com/?p=8598 How to add a tweeter to a speaker. Very simple circuit, using only one potentiometer and two capacitors, very easy to install.

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The post Adding a Tweeter to a Speaker appeared first on Electronics Area.

]]> https://electronicsarea.com/add-tweeter-baffle-speaker/feed/ 0 5 to 30 Minute Timer Circuit using 7555 IC https://electronicsarea.com/5-to-30-minute-timer-circuit-7555/ https://electronicsarea.com/5-to-30-minute-timer-circuit-7555/#comments Fri, 22 May 2026 15:03:01 +0000 http://electronicsarea.com/?p=2313 This 5 to 30-minute timer circuit achieves times ranging from 5–30 minutes using the 7555 integrated circuit (CMOS version of the popular 555 timer).

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The post 5 to 30 Minute Timer Circuit using 7555 IC appeared first on Electronics Area.

]]> https://electronicsarea.com/5-to-30-minute-timer-circuit-7555/feed/ 2 Coulomb’s Law – Electrostatic Force – Formula – Example https://electronicsarea.com/coulombs-law-electrostatic-force/ https://electronicsarea.com/coulombs-law-electrostatic-force/#respond Thu, 21 May 2026 22:09:03 +0000 http://electronicsarea.com/?p=288 Coulomb's Law—Electrostatic Force: Formula and example. Learn how to calculate the electrostatic force between 2 electric charges using Coulomb's Law.

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The post Coulomb’s Law – Electrostatic Force – Formula – Example appeared first on Electronics Area.

]]> https://electronicsarea.com/coulombs-law-electrostatic-force/feed/ 0 Structure of Matter: The Bohr Atom and the Electricity https://electronicsarea.com/structure-matter-bohr-atom-electricity/ https://electronicsarea.com/structure-matter-bohr-atom-electricity/#respond Thu, 21 May 2026 16:33:21 +0000 http://electronicsarea.com/?p=1842 Structure of Matter: The Bohr Atom and Electricity. The atom, the electron. Positive and negative ions. How free valence electrons become electricity

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