摘要： 下面是 [电池供电小夜灯电路]的电路图　　材料BOM表：R1 = 1M R2 = 1M R3 = 47K R4 = LDR C1 = 100nF-63V C2 = 220uF-25V D1 = Ultra Bright 10mm LED D2 = 1N5819 B1 = 1.5V Battery or AA Cell IC1 = 7555 CMos Timer IC(责任编辑：电路图)