Electronics Area – Electrical and Electronics Tutorials and Circuits
Welcome to Electronics Area
Electrical and Electronics Tutorials and Circuits
Recent posts
Battery Monitor Circuit using 4 LEDs for a car
This simple car battery monitor allows us to know the voltage of the battery at all times. To achieve this, 4 LEDs are placed somewhere on the dash of the car. Each LED has a label indicating the battery voltage at that time.
Scientific Notation – Engineering Notation
Scientific notation and engineering notation allow the representation of very large or very small quantities, very common in engineering and technical fields
2-LED Temperature Change Indicator with LM35 & 741
This circuit shows us, by means of 2 LEDs, when the sensed temperature is above or below a set limit. When the temperature is above the preset temperature level, LED D1 will light up, and if it is below, LED D2 will light up.
Internal Resistance of a Voltage Source. What is it?
Voltage sources, whether batteries, generators, etc., are not ideal (perfect). A real voltage source is composed of an ideal voltage source in series with a resistance called internal resistance.
ON-OFF Switch circuit using a 555 timer (PCB)
This circuit has many applications on places where it is necessary to activate and deactivate (connect and disconnect) an electrical or electronic device.
Capacitor – Charge, Voltage & Capacitance
The capacitor is a device made of 2 metal plates separated by a dielectric material. The charge, voltage, and capacitance relationship. Measurement units
Electrolytic Capacitor
The electrolytic capacitor has been developed to achieve large capacities in small physical dimensions. To achieve this, a special dielectric is used.
Logic Probe using two transistors
This Logic Probe is a simple circuit implemented using two NPN bipolar transistors (T1, T2) in a Darlington configuration
PWM – What is Pulse Width Modulation?
PWM (Pulse Width Modulation) is a technique used to control the width of a digital signal in order to adjust the power delivered to certain devices.
High-Speed Electronic Fuse for Solid-state Circuits
The high-speed electronic fuse circuit operates in nearly one-hundredth of a microsecond, making it faster than an ordinary fuse.
Current-limited 6 V Battery Charger
This current-limited 6V battery charger uses the well-known LM317T regulator to control the maximum current at which a 6-volt battery can be charged.
How do I test a Zener diode? – A simple method
Procedure to be followed when testing Zener diodes. How to find the voltage of an unknown zener diode