This circuit was found in the 1992 Radio Electronics Handbook. It is used to test VCR recording heads. It can also be used for other purposes.
This circuit was found in Philips documentation from 1965. No information was given about the...
This circuit was found in a 1977 publication, but it can be easily assembled, although unijunction...
The circuit that we give below has two possible applications: it can be used to control a lamp...