Published:2011/6/7 7:59:00 Author:nelly | Keyword: outburst audio | From:SeekIC
As shown in the figure 11-20, the outburst audio circuit is composed of a monostable trigger circuit and a multivibrator, it can be made of a 556 integrated block and some resistor capacitor components, it is used in audio, alarming and so on.
When a negative trigger pulse is added to IC1-1's trigger terminal 6 foot, IC1-1 rolls over and it is timed, td=1.1R1C1,the metastable time of graphical parameter is about 10s. The outputed high level pulse is added to IC1-2's reset terminal 10 foot, then IC1-2 starts to vibrate,the oscillation frequency f=1.44/(R2+2R3)C2. According to different occasions and needs, the audio frequency can be designed, after 10s, it stops automatically. This circuit also can be used to control the electrical equipments.
Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/555_Circuit/555_outburst_audio_circuit.html
Print this Page | Comments | Reading(3)
Code: