Quote:
Originally Posted by bureaupro2000@yahoo.com
Hello Qiaozhi
What inductance should have, TX coil?
Bs.Reg.,
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The TX inductance is approximately 1mH, which results in the tank circuit being tuned to about 50kHz. The 555 timer drives the coil at 65kHz, so the actual coil inductance is not critical. As mentioned in the text, it is left to the reader to experiment with tuning the TX and RX coils into resonance.