Electrostatic Force – Coulomb’s Law
The Electrostatic force is an attraction or a repulsion force. It depends on the charges and distance between them.
May 132019
May 122019
Electronics – Electrical Unit Definitions
Definitions of basic measurement units in electricity and electronics. Ampere (A), Coulomb (C), Joule (J), Watt (W), Farad (F), Henry (H), Ohm (Ω), Siemens (S), Volt (V), Hertz (Hz), Radian, Angular frequency (w), Time (t)
May 102019
What is an Inductor? – Inductance – Units
Inductor stores energy in form of magnetic field due to the self-induction phenomenon. A cable where a current circulates, has on its surroundings a magnetic field.
May 092019
RC High Pass Filter (passive High Pass filter)
An RC high pass filter allows only the passage of frequencies above the cut-off frequency (Fc) and eliminates frequencies above this frequency
May 082019
How to make 12V 1A power supply using zener diode and transistors?
This 12V 1A power supply using zener diode and transistors allows us to obtain an output of approximately 11.4 volts with a very small percentage variation for a wide variety of loads.
May 072019
Lie detector circuit using two transistors
This simple lie detector consists of two transistors and other additional components and can detect if a person does not tell truth (the person is lying), using two sensors placed directly on the skin.
May 032019
Surge Protection Circuit (Voltage Delay Circuit)
This Surge protection circuit is placed between the DC voltage source and the circuit that you want to power. This circuit delays the voltage given by the power source and allows the voltage to be applied to the circuit or device a few moments later.
Apr 242019
How to use op amps with a single rail power supply?
– Method 1: Voltage divider using two resistors.
– Method 2: Voltage divider using two Zener diodes.
Apr 222019
The Superposition Theorem
The Superposition theorem states that the effect of two or more voltage sources in a resistor is equal to the sum of the individual effects of each source taken separately, replacing all the remaining voltage sources with short circuits.
Apr 162019
What is Direct Current? – DC
Direct Current (DC), is the result of the flow of electrons (negative charge) in a conductor (most of the time, wires of copper) that goes only in one direction.
Apr 152019
What is Electrical Resistance? Obtaining a material’s resistance
The electrical resistance is a measurement of the opposition that offers a material to the passage of electrons (the electric current). When a material, such as metals has many free electrons, it allows the easy flow of electrons and it is called conductor.
Apr 122019
A Time Delay Light switch circuit
This circuit is useful to illuminate locations where a light source of low power is needed. A closet, a car trunk, are good examples.