This circuit of old medical documentation generates pulses in a ratio of 20 to 300 and duration of 3 ms. The circuit has biomedical applications and can use modern equivalent components.
Based on the LF256 operational amplifier, this circuit was found in the September 1989 issue of...
This adjustable source from 2 to 15 V uses transistors from the 60's, as indicated in the...
Found in a 90s Popular Electronics, this circuit is intended for amplifying analog video signals....