Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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12V Auto turn-off battery charger
12V Auto turn-off battery charger
This 12V auto turn-off battery charger automatically disconnects from mains to stop charging when the batteries are fully charged. It serves to charge the battery of our car, using the 120/240 VAC
Truth Table
Truth Table is used to simplify boolean equations obtained from digital circuits. The truth tables can have many columns, but all tables operate in the same way.
LM317 Variable Voltage Regulator Circuit
LM317 variable voltage regulator circuit diagram.
LM317 characteristics. How the voltage regulator circuit works, Regulator circuit operation improvement
Temperature Alarm Circuit using a diode
This temperature alarm circuit uses a common semiconductor diode as the temperature sensing element. The circuit can be used as a high or low temperature alarm.
5 to 30 Minute Timer Circuit using 7555 IC
This 5 to 30-minute timer circuit achieves times ranging from 5–30 minutes using the 7555 integrated circuit (CMOS version of the popular 555 timer).
Car Battery Monitor Circuit
Car Battery Monitor Circuit
This Car battery monitor circuit is very simple and very interesting. How many times have you found that the car does not start because the battery is discharged?
Water Level Controller Circuit using Transistor and Relay
This simple Water level controller circuit is useful to control the water level in a tank. It does this by turning On and Off a water pump depending on the status of the sensors.
2 watt Audio Amplifier Circuit with the TDA2822M IC
This 2 watt audio amplifier circuit is specially designed to consume little power and to be used with batteries or low voltage power sources.
Dual polarity Variable Power Supply (+15V / -15V) max
Dual polarity variable power supply (+/- 15 volts). Voltage source with a maximum amplitude of +/- 15 volts and a current of up to 1.5 amps.
Current Divider Rule in parallel resistors
By using the current divider rule, we can find the current in each resistor connected in parallel. The electric current passing through a circuit of two resistors in parallel is divided in two.
12 to 5 volt Converter Circuit (for cars)
This 12 to 5 volt converter circuit is very useful. It can be used to connect 5 volt electronic devices in a car with a 12 volt battery. (Automotive lead-acid batteries can be up to 13.7 volts).
Logic OR gate – Symbol & Truth Table
The logic Or gate is one of the simplest digital logic gates. The output of this gate is “High”, when one or all of its inputs are “High”. We can also say that, the output of an OR gate is “Low” only when all gate inputs are “Low”.