下面是[植物浇水电路]的电路图本电路的目的是给出一种信号,即当一种植物需要水,花盆地面过于干燥,能发出一种信息,水分含量增加一个LED闪烁。调整R2将允许用户更好地适应了不同的理由,盆和探头类型电路的灵敏度。 材料BOM表: R1 = 470K R2 = 47K R3 = 100K R4 = 470K R5 = 3.3K R6 = 15K R7 = 100R C1 = 1nF-63V C2 = 330nF-63V C3 = 10µF-25V C4 = 10µF-25V D1 = 1N4148 D2 = 5mm. Red LED Q1 = BC557 PNP Transistor P1 = Probe (See Notes) P2 = Probe (See Notes) B1 = 3V Battery (2xAA, N or AAA 1.5V Cells in series) IC1 = 4093 = Quad 2 input Schmitt NAND Gate IC (:电路图) |