This circuit was found in old documentation, however the components used are common today. The selection of times is done by switch and the 556 consists of a double 555.
This circuit was found in Popular Electronics. Its purpose is to warn the visually impaired when a glass...
This circuit is from an American publication about old neon lamps. The circuit is leak proof and...
The frequency of this oscillator, found in the 1960 transistor reference manual, is around 3.5...