This flasher was found in an 80's Electronic Engineering but can be easily implemented with modern general purpose transistors. The frequency depends on C1.
Figure bellow shows how the 4088 or 4018 can be used as a touch switch. Two metal plates separated by 1 mm...
The circuit shown in the figure is intended for medical applications where the sector in contact...
This fast RGB multiplexer circuit was found in a Linear Technology manual from the 1990s. The...