This metal detector circuit uses an AM radio as an indicator. The radio is placed off-station and tuned to the frequency set at C1. The transistor may be a BC548. L1 should be tuned to the medium wave band.
This metal detector circuit uses an AM radio as an indicator. The radio is placed off-station and tuned to the frequency set at C1. The transistor may be a BC548. L1 should be tuned to the medium wave band.
