This product is a solution for mobiles with camera and audio port but no flash. The quality of low light images can be greatly improved by the use of slave flash. A
'click' sound is produced when you take picture by mobile. This sound is used as a trigger signal to slave flash through audio port. The signal is given as trigger signal to IC555 in monostable mode. The monostable output is used to drive the slave flash i.e. power LED's through ULN2803 driver.
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