Electronics Area – Electrical and Electronics Tutorials and Circuits
Welcome to Electronics Area
Electrical and Electronics Tutorials and Circuits
Recent posts
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)
Ideal Transformer Working Principle
Ideal transformer working principle. How the transformer works. Voltage & current transformation ratio. Power ratio between primary & secondary windings
Current Limiter circuit for Power Supply using transistor & resistor
Current Limiter circuit for a Power Supply using a transistor and a resistor.
If the load current exceeds its maximum, an over current protection is needed
DC Motor Speed Controller Using PWM
This DC motor speed controller allows you to adjust the speed of small, three- or six-volt DC motors commonly found in toys and small electronic devices.
Car Battery Monitor Circuit using 4 LEDs
Car battery monitor circuit using 4 LEDs
This simple Car battery monitor, allow 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.
kWh – Cost of Electric Energy
The unit of measurement used in the electricity bill is the kWh, however in the electrical or electronic products that we buy in stores, the unit of electricity consumption is given in watts or kilowatts.
Power Factor (PF) Definition and Formulas
Power factor is the ratio between the energy that is converted into work and the electrical energy consumed in a circuit or device
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).
DC motor speed controller circuit using a 555 timer.
This simple DC motor speed controller circuit works at 12 volts and controls a DC motor using a 555 integrated circuit.
400 Watt Stereo Amplifier Circuit with STK4050
This 400 watt stereo amplifier circuit uses the Sanyo STK4050 hybrid IC, a high quality low noise amplifier. Its maximum output power is 200W per channel
Fridge Door Alarm Circuit
Refrigerator door alarm circuit with two 555 timers
This refrigerator door alarm circuit alerts you when the door has been left open. Very important, because the power consumption increases when this happends. It uses the popular 555 timer IC