Suggested by Mullard in a1969 documentation, this circuit generates the erasure signal for tape recorders of the time. Transistors can be modern equivalents like BD136 and BD136.
When the sensor connected to points A and B is activated, removing the ground from the base of Q1...
This oscillator was found in the 1994 National Instruments Linear Applications Handbook. The...
With the circuit shown in the figure, the frequency of a 5 MHz oscillator controlled by crystal can...