This circuit detects smoke by changing the light falling on the sensor. The circuit was found in the Electronics Experimenter's Handbook of 1991. Optical devices must be used.
This circuit for receivers was found in an American documentation from the 90's. The circuit...
This circuit found in an American documentation from 1964, alters the duration of a pulse and can...
In the figure we have the way of obtaining 220 V from two equal 110 V transformers or 230 V from...