| 摘要 |
PURPOSE:To control stably a power source voltage with a simple additional circuit, by using a microcomputer and controlling the input voltage of a power supply circuit in parallel with other control programs by the interruption processing. CONSTITUTION:The input of AC100V is dropped to 30V by a transformer 201 and is smoothed through a full-wave rectifying bridge 202 by a capacitor 203 to turn on and off a transistor Tr204 through a Tr221 connected to an output port PC2 of an I/O port 22 and passes through a stabilizing circuit consisting of a diode 205, an inductance 206, and a capacitor 207 to supply the stabilized output of DC24V to a clutch CL24, a motor 25, and a solenoid 26. This output is divided by resistances R1208 and R2209 and is inputted to an input port PA2. The RST7.5 terminal of a CPU is interrupted by the TIME-OUT signal of the I/O port to control a PC2, thus controlling the power source voltage stably. |
