| 摘要 |
A dual timer using CMOS NAND gate ICs includes transistors (TR1-2), a relay (K), a bridge diode (BD), a zener diode (ZD), NAND gate ICs (IC1-4), volumes (VR1, VR2), resistors (R1-9), diodes (D1-3), and condensers (C1-6). The operation time is set by adjusting the volume (VR1) controlling the charging time of the condenser (C2) and the stop time by adjusting the volume (VR2) controlling the charging time of the condenser (C2). The operation and stop actions are repeated by the setting times.
|
