Electronics Area – Electrical and Electronics Tutorials and Circuits
Welcome to Electronics Area
Electrical and Electronics Tutorials and Circuits
Recent posts
High current pulse generator
High current pulse generator using a 555 timer and a voltage regulator. This circuit can be useful for DC Motor control. Light control, etc.
Diode Tester Circuit using 741
This diode tester circuit checks, if the diode is in good condition and also determines its polarity. To accomplish our goal, we use an 741 operational amplifier (IC1) configured as an oscillator.
What is the Difference between Electricity and Electronics?
The difference between electricity and electronics or the difference of an electric circuit and an electronic circuit, is that in the electronics circuit, a control is exercised over the flow of the electric current.
How to Extend the Voltage Range of an Analog Multimeter?
How to extend the voltage range of an analog Multimeter? In order to extend the voltage range, a resistor is placed in series with the multimeter. Calculation example.
Logic probe circuit using CD4001 IC
Logic probe circuit with CD4001 IC. This circuit is implemented with CMOS IC technology and is recommended for testing circuits using the same technology
Transistor – Zener Voltage regulator circuit
Transistor – Zener diode Voltage regulator circuit. This circuit delivers an output voltage established by the voltage of the zener diode less 0.7 volts
Gray code – Gray code Table
The Gray code is a special type of binary code that is unweighted (the digits that make up the code does not have an assigned weight).
What is Electrical Resistivity?
Electrical resistivity [ρ] (rho) is a characteristic of materials and has ohm-meter unit. Resistivity indicates how much the material opposes the flow of electric current.
Fire alarm circuit using thermostats and SCR
Fire alarm circuit using thermostats and SCR.
This circuit uses several thermostats in parallel for its operation. They can be as many as you want and must be placed in the places where you want to sense the temperature.
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.
Power Failure alarm using transformer and relay
Power failure alarm using transformer and relay
This power failure alarm circuit is very simple and is very useful when used with electric ovens, a refrigeration systems or to prevent a thief from cutting off the electrical power because it immediately warns of the problem. It also serves you when the fuses have blown.
4-channel audio mixer using LM3900 IC
4-channel audio mixer using LM3900 IC
4 operational amplifiers, some resistors and capacitors to implement an audio mixer with a very simple design.