下面是[水位警报电路]的电路图 电路图
材料BOM表:
R1 = 1K - 1/4W Resistor R2 = 100K - 1/4W Resistor (See Notes) C1 = 2.2uF-50V Electrolytic Capacitor C2 = 220µF - 25V Electrolytic Capacitor (See Notes) D1 = 5 or 10mm. Ultra-bright red LED (See Notes) D2 = 1N5819 - 40V 1A Schottky-barrier Diode (See Notes) IC = 7555 or TS555CN CMos Timer IC BZ = Piezo sounder (incorporating 3KHz oscillator) B1 = 1.5V Battery (AAA or AA cell etc.) Two small crocodile clips Two pieces of stiff wire of suitable length Battery socket, etc. (:电路图) |