首页->轻松调频跟踪变送器电路图
元件清单:R1 = 10KC1 = 100uF/10VC2 = 10nF的C3 = 4-40PF微调电容C4 = 4.7pFIC1 = LM3909Q1 = 2N3904 NPN晶体管LED1 =红色LED /或其他颜色......