This circuit is from 1968 American medical documentation. The circuit generates pulses of excitation that are applied to the patient's heart. The components are from the era. The pulses are 1 ms.
This filter, found in an old manual, has characteristics of reduced overvoltage given by the graph...
This circuit is from an American publication from the 60's. The power is on the order of 600 mW....
One 40108 Schmitt inverter or one 4093 gate can be used as a half monostable to be triggered by...