An electronic system applicable to electric door openers, comprising: - non-polarised connectors for introducing main power (a); within a specified range of amplitude, - a rectifying block of the main power, - an energy storage system coming from the rectifying block and made up of a capacitive element, - a voltage regulator that once the system is powered provides internal, secure and stable power (b) to a microprocessor, - a conditioning stage, - a power stage for powering a solenoid, - a solenoid responsible for locking and unlocking the electric door opener, - a microprocessor that monitors a conditioning stage, and provides timing for activating the power stage that initially powers the solenoid with the maximum energy based on the main power voltage (a), then moving to a lowpower mode by using pulse width modulation (c), the solenoid remaining indefinitely activated during this process and until disconnecting from the main power and, - an activity indicator of the system, connected to the microprocessor and which indicates by means of a light signal the activity of the system monitored by said microprocessor during the entire operational process and; characterised in that it comprises: - a Hall effect sensor connected to the microprocessor and powered by the voltage regulator, such that when said Hall effect sensor detects a magnetic field produced by the solenoid, which determines mechanical actuation, it independently activates a first output voltage (d) or, alternatively, sends a detection signal of said magnetic field to the microprocessor causing the activation of a second output voltage (e) by said microprocessor wherein the first voltage output (d) or second voltage output (e) is connected to an external control switchboard, providing a signal of the state of the solenoid, and subsequently, information on the open or closed state of the door at all times. - non-polarised connectors for introducing main power (a); within a specified range of amplitude, - a rectifying block of the main power, - an energy storage system coming from the rectifying block and made up of a capacitive element, - a voltage regulator that once the system is powered provides internal, secure and stable power (b) to a microprocessor, - a conditioning stage, - a power stage for powering a solenoid, - a solenoid responsible for locking and unlocking the electric door opener, - a microprocessor that monitors a conditioning stage, and provides timing for activating the power stage that initially powers the solenoid with the maximum energy based on the main power voltage (a), then moving to a lowpower mode by using pulse width modulation (c), the solenoid remaining indefinitely activated during this process and until disconnecting from the main power and, - an activity indicator of the system, connected to the microprocessor and which indicates by means of a light signal the activity of the system monitored by said microprocessor during the entire operational process and; characterised in that it comprises: - a Hall effect sensor connected to the microprocessor and powered by the voltage regulator, such that when said Hall effect sensor detects a magnetic field produced by the solenoid, which determines mechanical actuation, it independently activates a first output voltage (d) or, alternatively, sends a detection signal of said magnetic field to the microprocessor causing the activation of a second output voltage (e) by said microprocessor wherein the first voltage output (d) or second voltage output (e) is connected to an external control switchboard, providing a signal of the state of the solenoid, and subsequently, information on the open or closed state of the door at all times. - a Hall effect sensor connected to the microprocessor and powered by the voltage regulator, such that when said Hall effect sensor detects a magnetic field produced by the solenoid, which determines mechanical actuation, it independently activates a first output voltage (d) or, alternatively, sends a detection signal of said magnetic field to the microprocessor causing the activation of a second output voltage (e) by said microprocessor wherein the first voltage output (d) or second voltage output (e) is connected to an external control switchboard, providing a signal of the state of the solenoid, and subsequently, information on the open or closed state of the door at all times.