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2:44
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Utsource
46K views · 2.4K reactions | How to Make Alarm Circuit using UM66 IC and BC547 Transistor? Source from Youtuber Utsource Sensor from Utsource:
Utsource. . How to Make Alarm Circuit using UM66 IC and BC547 Transistor? Source from Youtuber Utsource Sensor from Utsource: https://www.utsource.net/home/sensors
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