How to make magic tester //Homemade wireless tester / Creative Channel

How to make magic tests - homemade wireless tester - Creative Channels.
- How to perform AC connection test without connection.
Check for broken ground wire and detect alternating current AC & DC
- Extremely simple DIY self-testing wireless device installed in AC testing equipment,
- Use 2 Transistor BC 547b.
- 4.5V battery
- Led 3v.
And connection drawings are available in the video.
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