This circuit for a simple alarm system was suggested in an article in Electronics Now magazine. The circuit has a small power stage that can be changed.
This circuit is from an English publication of 1982. The bipolar transistor can be a BC548 and the...
This circuit sequentially drives loads connected to its outputs or even applies the signals to the...
This low-pass filter was found in Intersil documentation from the 1980s. The circuit makes use of...