FIELD: electricity.
SUBSTANCE: system equipped with microcomputer for power tool includes microcomputer, reference voltage generator, reference data memory unit and the first detection unit. Microcomputer includes analogue-to-digital converter (ADC) and at least one analogue-to-digital port (AD-port). Reference voltage generator generates and introduces preset reference voltage to AD-port. Reference data memory unit contains reference data corresponding to reference voltage which have been saved earlier. The first detection unit compares diagnostic data obtained in result of AD-conversion by ADC of reference voltage fed to AD-port with reference data so that when difference between diagnostic data and reference data exceeds preset limits of permitted range it could be detected that AD-anomaly occurs and in this state it is not possible to obtain correct result of AD-conversion from ADC.
EFFECT: increasing quality of power supply charging.
17 cl, 7 dwg
