Electronic Bird Repeller (2)

Published:2011/5/20 5:13:00 Author:Sue | Keyword: Electronic, Bird, Repeller | From:SeekIC

When S is on, multivibrator generates signals. T generates 300V voltage and charges C2. When D3's voltage reaches 4.5V, D4's output has high level, making VD2 disconnected. Low frequency oscillator stops working. V2 is connected and YV is connected. The gong is knocked to make a sound. When YV works, C2's voltage is used and C3's voltage is higher than 4.5V. D4's output has low level and VD2 is connected. V2 is disconnected, K and YV are released and C2 begins to charge. There will be anautomatic knock at the gang.



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