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 booster for listening to signals in the range from medium waves to 30 MHz was found in a 1998...
In the figure we show our first circuit that consists of a simple touch switch capable of driving a...
Using a 7400 we have a short-wave transmitter from 4 to 9 MHz, shown in the figure. The coil...