This circuit provides a delay for the activation of an alarm, giving the owner time to leave the premises. The circuit is from the 1995 Encyclopedia of Electronic Circuits Volume 5.
This circuit is from a 2005 Linear Technology manual. The circuit is powered by 3.3 V but can...
This circuit uses two operational amplifiers, which can be of the type 741, in a full wave...
This simple circuit for an audio link uses a lamp, which has a very poor frequency response, but...