Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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Voltage Drop Alarm Circuit: Useful for PS testing
This voltage drop alarm is very useful for power supply monitoring or testing. It activates a buzzer when the test voltage drops below a reference voltage.
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.
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 an insulator or dielectric. 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.