74HC90 (Decade, Divided by twelve AND binary counter- 4-BIT Binary Counter) 35C and a precision temperature sensor

and a precision temperature sensor Furthermore

Micro-stepping capability (1/1

CN3065 solar charger datasheet

The 74HC174  are hex positive edge -triggered D-type flip-flops with individual data inputs (Dn) and outputs (Qn)

Operating temperature range: -20~65°C

74HC90 (Decade, Divided by twelve AND binary counter- 4-BIT Binary Counter) 35C and a precision temperature sensorhigh speed 4 bit ripple type counters partitioned into two sections. Each counter has a divide by two section and either a divide by five section which are triggered by a HIGH to LOW transition on the clock inputs. Each section can be used separately or tied together (Q to CP) to form BCD, bi quinary, modulo 12, or modulo 16 counters. All of the counters have a 2 input gated Master Reset (Clear), and the LS90 also has a 2 input gated Master Set