This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with equivalent transistors. The power supply must be symmetrical.
Radio Electronics magazine published in a 90's issue this simple alarm that can use any general...
This one-channel circuit was found in a 90s Popular Electronics, functioning as a vox. Components...
This negative bias circuit provides negative voltages from 3.5 to 6.5 V sources. The circuit was...