Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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Sinusoidal oscillator (basic structure)
Basic structure of the sinusoidal oscillator
The sinusoidal oscillator basic structure consists of an amplifier (A) and a selective frequency network (ß) connected in a positive feedback loop
Photodiode – How does it work? – Optoelectronics
Photodiodes produce a leakage current that is proportional to light intensity. This current flows in the opposite direction to the current in a conventional diode
Temperature alarm circuit with Op. Amp.
Temperature alarm circuit with 741 operational amplifier
This temperature alarm circuit with operational amplifier activates a relay when the temperature of the place to be controlled exceeds a set level. Useful for an oven temperature control or a cooling system
Operational Amplifier as Comparator
Operational Amplifier as Comparator (voltage comparator). Op-Amp can work as comparator when the differential gain in open loop is high and the speed is not a critical factor
Amplifiers and Amplification
Amplifiers and Amplification
Amplifiers are circuits that are used to increase an input signal, thus you can obtain an output signal with much greater amplitude than the original one. Amplification is the process to increase the magnitude of a signal, generally using an amplifier.
Series RC circuit connected to an AC voltage
In a series RC circuit, the current through the resistor and the capacitor is the same. The voltage VS is equal to the phasor addition of the voltage drop across the resistor (Vr) and the voltage drop across the capacitor (Vc).
Over temperature alarm circuit using Thermostat
Over temperature alarm circuit using Thermostat
This alarm circuit uses the 67L080 thermostat (TH) and can be assembled easily, due to the small number of components required.
SBS – Silicon Bidirectional Switch
The SBS – Silicon Bidirectional Switch is a symmetrical low power device used on trigger applications. The SBS is more versatile than the SIDAC.
It also has an additional terminal, which allows you to modify its trigger characteristics with small pulses of current.
Air core inductor inductance calculation
There are some occasions when we have an air core inductor, and we don’t know what its value is. There is an easy way to obtain the inductance if you have the external measurements of this component.
Power Transformer usage
The Electric Power Transformer usage. The transformers allow the modification of the voltage and the current values, so they can take the appropriate one to carry and distribute the electric energy.
7-segment Display
What is a 7-segment Display?
The 7-segment display, is a component used to represent numbers in many electronic devices.
Today, it is very common to find LCDs in much electronic equipment, but there are many that still use the 7-segment display for its simplicity.
Darlington transistor
What is a Darlington transistor?
The Darlington transistor is a special type of transistor with a high current gain. It consists of two internally bipolar transistors being connected in cascade