In figure 1 we have a circuit that turns on after a certain time and then turns off, also after a second interval.
This circuit uses a 555 (according to the diagram) to generate 50 ms tone bursts at a frequency of 1.5...
This grounding test circuit was found in an American 80's documentation. The circuit is for the...
This circuit allows frequencies between 1.8 and 30 MHz to pass. Data for the coils is provided next to...