This timer for long time intervals is from the 1990 Motorola Linear Databook. The setting applies to other operational ones and component values are given below the diagram.
This preamplifier is intended for the use with magnetic pick-ups. Power supply must have voltages...
We found this circuit very simple in an old documentation. The relay is high voltage sensitive, but...
TR1 must be mounted on a heatsink in this circuit. Voltage output is 8.6 V but this value can be...