Found in a 1964 Electronic Design, this circuit makes use of FETs of the time. These transistors can be replaced by modern general-purpose types. The input resistance is 30 M.
This high quality circuit with complementary symmetry was found in an Electronics World of 1966....
Found in an Electronic Design this circuit controls a headlamp by triggering a time determined by the...
This small switched regulator was found in an 60’s Optical Electronics. The circuit uses an...