A capacitor meter will be needed to read the capacitance from the temporally installed add on variable capacitor.
将需要一个电容计，读取时间安装的可变电容器的电容。
2
Variable capacitors are not normally used in timing circuits because their capacitance is too small to be practical and the range of values available is very limited.
可变电容器通常不用于定时电路，因为它们的容量太小，实际和价值观念的范围提供非常有限。
3
They are based on the principle of silicon piezoresistive effect, mobility change, and variablecapacitance respectively.