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本交流220伏定时供电器可满足工业生产中需精确定时供电的需要,具有电路简单、工作可靠等特点。电路采用555时基电路组成开机延时电路,以控制电耦合器件MOC3401的开通。 定时供电器的手控件——开机延时电路如图1所示。它由—555时基电路、二极管D、电阻器R及电容器C_1与C_2组成。此电路接通电源时,由于时基电路的⑥脚和②脚为低电平,其输出端③脚为高电平。这时,电源V_(cc)经电阻器R、电容器C_2至地构成通路,并对电容器C_2充电。当电容器C_2,即时基电路的⑥脚和②脚的电平充至2/3V_(cc)时,时基电路的输出端③脚翻转,输出
The exchange of 220 volt timer power supply to meet the needs of industrial production needs precise timing power supply, with a simple circuit, reliable and so on. The circuit uses 555 time base circuit composed of boot delay circuit to control the opening of the electrical coupling device MOC3401. Timing power hand controls - boot delay circuit shown in Figure 1. It consists of -555 time base circuit, diode D, resistor R and capacitors C_1 and C_2. When this circuit is connected to the power supply, the ⑥ pin and ② pin of the time base circuit are low level, and the output pin ③ is high level. At this time, the power V_ (cc) forms a path to the ground via the resistor R and the capacitor C_2, and charges the capacitor C_2. When the capacitor C_2, ⑥ feet of the real-time base circuit and the level of the foot is charged to 2 / 3V_ (cc), the output of the time base circuit 3 feet flip, the output