This circuit for the 60 kHz range was found in 73 magazine and published in 1995. The circuit uses a ferrite rod. Note the direction of the coil windings.
This useful benchtop power supply uses a single LM350 integrated circuit as a regulator. The...
This circuit is for the system that has the receiver CB17134E. The emitting LED must be installed in a...
This circuit generates signals that depend on Ct and the 10k trimpot adjustment. See the math...