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WebNov 14, 2000 · If you take a basic digital cell phone apart, you find that it contains just a few individual parts: A circuit board containing the brains of the phone. An antenna. A liquid … WebMar 12, 2024 · 67 1. Add a comment. 1. Old telephone lines used a 70VAC signal on the lines to activate the ringer. So you will need a 70VAC source (transformer) for your voltage and … sonic boom: shattered crystal
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