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 simple 1-transistor MW radio for listening on the phone was found in a Japanese magazine in...
This is an improvement on the previous circuit with a preamplification stage. The circuit is from...
November 2016 - Mouser Electronics is making the new Kyocera MC2016K Series crystal oscillators...