This circuit covers 400 kHz to 40 MHz in three bands according to the selected coil. The double MOSFET allows equivalent, since the original is not easy to obtain.
May 2017 - New sequencers UDC9090A for monitoring up to 10 power supplies from Texas Instruments...
The duty cycle of a Schmitt Oscillator can be programmed by R1 and R2 in this circuit. The...
This alarm circuit was found in the July 1992 Radio Electronics magazine. The circuit uses a small...