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.
The cascade connection of two flip-flops allows division by 4, as shown in the figure. Note that...
This power supply with several transistors can supply a current of several amps and a voltage of...
The incidence of light in the LDR causes this circuit to start operating, emitting a sound whose...