This circuit generates noise pulses for audio equipment probes. The circuit is from a 90’s 303 Circuits. The operational amplifier is an input FET type.
This isolated shield is from an old documentation, making use of an operational one of the time. It...
We found this transmitter circuit in a 1990s spy book. The coil data is provided along with the...
In this circuit we have the way to use common diodes to obtain low regulated voltages in a single...