Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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12V to 9V DC Converter Circuit Diagram (PCB)
This 12V to 9V DC converter is very useful for powering 9V DC devices in a car that uses 12V battery. The maximum current consumption allowed by this circuit is 0.8 amps.
Darkness detector circuit with audio output using 555
The main elements of this circuit are the 555 integrated circuit, working as an astable multivibrator and an LDR which is used as darkness sensor.
1.5 v Joule Thief Circuit with no Toroid Coil
This 1.5 V Joule Thief circuit can turn ON one LED. The circuit doesn’t use a toroid coil, but you can turn on a common red, green, or yellow light-emitting diode (LED).
6 Watt Audio Amplifier Circuit with TDA2613 (Hi-Fi)
High fidelity 6 watt audio amplifier circuit with the TDA2613 Integrated Circuit, very easy to implement due to its very few external components
Battery Charge Monitor Circuit with LM3914 IC
Battery Charge Monitor Circuit with LM3914 IC
This battery charge monitor shows, with colored LEDs, the charging process of a typical 12-volt car battery using the LM3914 Dot / Bar Display Driver.
Audible Continuity Tester
This continuity tester with buzzer works on live circuits. Very important, as common continuity testers are used with the power source disconnected.
Power Supply – Block Diagram (AC – DC conversion process)
Many electronic circuits need a direct current (DC) voltage source, but what we commonly find are voltage sources of alternating current (AC). In order to achieve a direct current voltage source, the alternating current input must follow a conversion process.
Electronic Thermostat Circuit using transistors
This circuit allows us to control the temperature of a room, turning a heating device on and off. Very useful in winter and in very cold places.
Light Operated Relay Circuit using LDR / Photoresistor
The LDR varies its value (ohms) depending on the amount of light that illuminates it. The more light less resistance and less light more resistance, A potentiometer is used to control the light level that activate the relay
Hexadecimal Numbering System
The hexadecimal numbering system (base-16). This numbering system is mainly used to simplify the representation of binary numbers and for the digital handling of colors.
LM350 Adjustable Voltage Regulator (Variable Power Supply)
This variable power supply uses the LM350 adjustable voltage regulator and can deliver 1.25 to 16 volts and a maximum current of 3 amps.
Universal Electric Motor – Construction, Operation, Speed
The universal electric motor is so named because it is the only motor that can be connected to both alternating current and direct current.