Therefore, when the clock goes high, IC2 produces an output count.
因此，当时钟变为高电平时，IC2产生一个计数输出。
This FET transistor, used here as variable resistor it's part of reaction circuit of IC2.
这FET晶体管，这里用作可变电阻的电路ic2的反应的一部分。
Omit resistor R3 if IC2 includes built-in pullup resistors, as do many modern microcontrollers.
如果IC2包括内置的上拉电阻，就可以忽略电阻r 3，许多现代微处理器都是这样的。
Rising overvoltage turns off both transistors in IC2, interrupting current flow through the control LED of IC3.
增加过电压关闭IC2中的电阻，通过IC3的控制LED中断电流流动。
Rising overvoltage turns off both transistors in IC2, interrupting current flow through the control LED of IC3.
增加过电压关闭IC2中的电阻，通过IC3的控制LED中断电流流动。
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