7 Simple Alarms 1. Alarms using an electro-magnetic buzzer To use the circuit shown below (left), the diode should be permanently illuminated by a beam of light. When the light beam is cut, by an intruder, - Magnetic circuit - Document - PDFSEARCH.IO

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	7 Simple Alarms 1. Alarms using an electro-magnetic buzzer To use the circuit shown below (left), the diode should be permanently illuminated by a beam of light. When the light beam is cut, by an intruder, Add to Reading List Document Date: 2006-01-01 10:00:47 Open Document File Size: 159,18 KB Share Result on Facebook Person David Hoult / / Technology 4001 chip / / SocialTag Schmitt trigger Alarms Electronic engineering Diode

7 Simple Alarms 1. Alarms using an electro-magnetic buzzer To use the circuit shown below (left), the diode should be permanently illuminated by a beam of light. When the light beam is cut, by an intruder,Add to Reading List