This circuit captures, through a coil, the signals emitted by another coil under the mat connected to the output of an amplifier. L1 is the primary winding of the 110 V x 6 V power transformer with a current of 50 to 250 mA from which the core has been removed. The handset is low impedance and powered from 2 small batteries or AAA.
| Clique na imagem para ampliar |
