74HC191 (4-Bit Counter) resistors and the active answering function

and the active answering function allows the issuance of an ultraviolet index (UVI) alarm signal based on a programmable threshold

We can regulate the knob to adjust the sensitivity

Support secondary development

The number of rotations can be detected by counting the number of pulses

74HC191 (4-Bit Counter) resistors and the active answering functionIntroduction : 74HC191 is an asynchronously presettable 4 bit binary up down counter. It contains fourmaster slave flip flops with internal gating and steering logic to provide asynchronous preset andsynchronous count up and count down operation. Asynchronous parallel load capability permitsthe counter to be preset to any desired value. Information present on the parallel data inputs (D0to D3) is loaded into the counter and appears on the outputs when