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 amplifier, common in 1986, uses a hybrid integrated circuit that can offer some difficulty to obtain...
This circuit was found in the May 1982 issue of Radio Electronics magazine. The circuit inverts the...
Found in a radio amateur magazine of the 1980s, this circuit uses components that can still be...