How to increase the output voltage of 78XX regulators. How to use a zener diode to boost the output voltage on a 7805, 7809, 7812, 7815, ….regulators.
Diode Connected in Parallel to a Relay Coil – Relay diode
The purpose of a diode connected in parallel to a relay coil (flywheel diode or freewheeling diode) is to avoid damaging some nearby components sensitive to high voltage.
LM317 Variable Voltage Regulator Circuit
LM317 variable voltage regulator circuit diagram.
LM317 characteristics. How the voltage regulator circuit works, Regulator circuit operation improvement
SCR (Silicon Controlled Rectifier) – Thyristor
What is an SCR?
The SCR (Silicon Controlled Rectifier) is a 4-layer semiconductor device that works as an almost ideal switch.
Schottky Diode (Schottky Barrier Diode)
Schottky Diode.
These diodes are characterized by their switching speed and low voltage drop when they are forward biased. (typically 0.25 to 0.4 volts)
UJT – Unijunction Transistor – Equivalent model & circuit
UJT or Unijunction transistor
The UJT or Unijunction transistor is constituted by two polluted regions, with three external terminals: two bases and one emitter.
What is a Phototransistor? – Phototransistor Equivalent Circuit
A phototransistor is essentially the same as a common transistor, but it can work in two different ways:
– As a common transistor, using the base current (IB)
– As a phototransistor, using the light that illuminates this element and that acts as the base current. (IP).
Zener diode – Basic Operation – Applications
The Zener diode is a special type of diode that allows the flow of current on the opposite direction of the arrow of the diode. This diode does not conduct until the applied voltage reaches or is greater of the breakdown voltage. Zener diode is very popular as Voltage reference element.
DIAC – Diode for Alternating Current. V-I characteristic
DIAC (Diode for Alternating Current)
DIAC is a bidirectional trigger diode, designed to trigger TRIAC and thyristors. DIAC is a voltage-triggered device
PUT – Programmable Unijunction Transistor
What is a PUT?
PUT – Programmable Unijunction Transistor. Main characteristics. PUT and UJT. Oscillator circuit design and waveforms. Frequency formula
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
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.