This circuit is from LinearTechnology Applications of 1997. The circuit uses components of the time used to raise the voltage of a battery from 3 to 6 V.
Taking advantage of the same basic configuration of the super-regenerative detector of the...
This circuit trips a relay when it stops receiving a signal. The transistor is germanium. We found...
This circuit with the HA2400 was found in the March 1980 Radio Electronics magazine. The circuit has...