This circuit uses a diode as a radiation sensor. The operational ones are old because the publication is from the 80's, but modern low voltage equivalents can be tested.
This low drift or offset circuit is from an 80's documentation. The configuration can be made with...
This is a commercial circuit from a Japanese publication from 1972. The circuit uses a FET that...
This instrumentation amplifier was obtained from Popular Electronics in 1993. The operational...