Piezoelectric sensor that comprises: - a microcontroller; - a plurality of piezoelectric sensor elements (20; 20, I; 20, 5 II; 20, III) of which at least two (20, I; 20, II) are: -- useable for producing a haptic signal by a voltage generated by a boost converter connected to each piezoelectric sensor element (20; 20, I; 20, II; 20, III) via a respective switch (1105; 1105, I; 1105, II; 1105, III), and -- connected to a piezo channel (PZF1; PFZ2; PZF3) of the microcontroller; - an array of control switches for individually controlling each of the switches (1105; 1105, I; 1105, II; 1105, III) for which a signal is present at a digital selection line connected to the respective piezo channel (PZF1; PZF2; PZF3), if a signal (DRVP) from an increase voltage pin of the microcontroller is present; and wherein the microcontroller is configured: i) to use each of the piezo channels (PZF1; PFZ2; PZF3) as a sensor channel for reading sensor input from the respective piezoelectric sensor element (20; 20, I; 20, II; 20, III); ii) in response to detecting a sensor input in at least one of the piezo channels (PZF1; PZF2; PZF3), iia) to set the signal (DRVP) at the increase voltage pin wherein the increase voltage pin is connected to the boost converter, and iib) to set a signal to at least one piezo channel (PZF1; PZF2; PZF3) in which the sensor input was detected, for producing a haptic signal with the respective piezoelectric sensor element (20; 20, I; 20, II; 20, III) such that the signal will be set in a time-interleaved manner with respect to the sensor input. - a microcontroller; - a plurality of piezoelectric sensor elements (20; 20, I; 20, 5 II; 20, III) of which at least two (20, I; 20, II) are: -- useable for producing a haptic signal by a voltage generated by a boost converter connected to each piezoelectric sensor element (20; 20, I; 20, II; 20, III) via a respective switch (1105; 1105, I; 1105, II; 1105, III), and -- connected to a piezo channel (PZF1; PFZ2; PZF3) of the microcontroller; -- useable for producing a haptic signal by a voltage generated by a boost converter connected to each piezoelectric sensor element (20; 20, I; 20, II; 20, III) via a respective switch (1105; 1105, I; 1105, II; 1105, III), and -- connected to a piezo channel (PZF1; PFZ2; PZF3) of the microcontroller; - an array of control switches for individually controlling each of the switches (1105; 1105, I; 1105, II; 1105, III) for which a signal is present at a digital selection line connected to the respective piezo channel (PZF1; PZF2; PZF3), if a signal (DRVP) from an increase voltage pin of the microcontroller is present; and wherein the microcontroller is configured: i) to use each of the piezo channels (PZF1; PFZ2; PZF3) as a sensor channel for reading sensor input from the respective piezoelectric sensor element (20; 20, I; 20, II; 20, III); ii) in response to detecting a sensor input in at least one of the piezo channels (PZF1; PZF2; PZF3), iia) to set the signal (DRVP) at the increase voltage pin wherein the increase voltage pin is connected to the boost converter, and iib) to set a signal to at least one piezo channel (PZF1; PZF2; PZF3) in which the sensor input was detected, for producing a haptic signal with the respective piezoelectric sensor element (20; 20, I; 20, II; 20, III) such that the signal will be set in a time-interleaved manner with respect to the sensor input. i) to use each of the piezo channels (PZF1; PFZ2; PZF3) as a sensor channel for reading sensor input from the respective piezoelectric sensor element (20; 20, I; 20, II; 20, III); ii) in response to detecting a sensor input in at least one of the piezo channels (PZF1; PZF2; PZF3), iia) to set the signal (DRVP) at the increase voltage pin wherein the increase voltage pin is connected to the boost converter, and iib) to set a signal to at least one piezo channel (PZF1; PZF2; PZF3) in which the sensor input was detected, for producing a haptic signal with the respective piezoelectric sensor element (20; 20, I; 20, II; 20, III) such that the signal will be set in a time-interleaved manner with respect to the sensor input. iia) to set the signal (DRVP) at the increase voltage pin wherein the increase voltage pin is connected to the boost converter, and iib) to set a signal to at least one piezo channel (PZF1; PZF2; PZF3) in which the sensor input was detected, for producing a haptic signal with the respective piezoelectric sensor element (20; 20, I; 20, II; 20, III) such that the signal will be set in a time-interleaved manner with respect to the sensor input.