Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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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.
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
Equivalent transformer circuits (power, audio, video and RF)
Equivalent transformer circuits (power, audio, video and RF). Normally, in the designs and analysis where transformers are used, it is very common to use the characteristics of the transformer as if it were an ideal transformer.
Wirewound Resistor
A wirewound resistor is used when the power to be dissipated is very high. A wire wound resistor is usually coated with a layer of vitreous enamel.