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塞中传出间隔的“嗒嗒”声,同时发光二极管D(BT202)也一闪一闪的。C_1充电电流缓慢减小,到达某一值时,BG_1、BG_2(均为3DG6)截止,振荡器停振。此时,电路消耗电源同电池的自然耗费。调节电阻R_3(100kΩ),使低频振荡声约2秒出现一次,延迟时间在20分钟以上,否则可改变R_1(20Ω)或C_1数值,满足要求。R_120Ω,R_2:1MΩ,E:3V,Y:8Ω;BG_3:BT33。
There was a rattling noise in the plug, and the LED D (BT202) flashed. C_1 charge current slowly decreases, reaching a certain value, BG_1, BG_2 (both 3DG6) ends, the oscillator stops vibration. At this point, the circuit consumes the same power as the battery. Adjust the resistor R_3 (100kΩ) so that the low-frequency oscillation sounds once for about 2 seconds and the delay time is longer than 20 minutes. Otherwise, the value of R_1 (20Ω) or C_1 can be changed to meet the requirement. R_120Ω, R_2: 1MΩ, E: 3V, Y: 8Ω; BG_3: BT33.