| 摘要 |
<p>A step motor type temperature meter includes an instrument mask (1), a dial (2), a circuit board (3), a night lighting circuit (4) and a housing (5). Wherein the circuit board (3) includes a temperature measuring circuit which includes a thermistor temperature sensor, a processing circuit, a stabilized voltage supply, a single chip computer, a step motor and pointer. The thermistor temperature sensor, the processing circuit, the single chip computer and the step motor are electrically connected in turn. The stabilized voltage supply is electrically connected with the processing circuit and the single chip computer via an output branch, respectively. The single chip computer is electrically connected with the step motor, and the processing circuit is connected with the single chip computer.</p> |
