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.
The name given to this project by the original Argentine publication of 1973 is not appropriate. It is...
The integrated circuit used in this project is uncommon today, but the configuration can be...
This circuit was found in English documentation from 1995. The circuit can be used in many...