Sound Effects Generator by UM3561

This circuit uses a UM3561 IC to produce four different sound effects.
Nothing too complicated here. The IC produces all the sound effects, the output at Pin 3 being amplified by the transistor. A 64 ohm loudspeaker can be substituted in place of the 56 ohm resistor and 8 ohm loudspeaker. The 2 pole 4 way switch controls the sound effects. Position 1 (as drawn) being a Police siren, position 2 is a fire engine sound, 3 is an ambulance and position 4 is a machine gun effect. The IC is manufactured by UMC and was available from Maplin electronics code UJ45Y. At the time of writing this has now been discontinued, but they have have limited stocks available.

Read More Source: Circuit : Andy Collinson
http://www.mitedu.freeserve.co.uk/Circuits/Music/sound_effects.htm
Thank you.

This entry was posted on Wednesday, April 9th, 2008 at 9:00 am and is filed under Audio - Alarm, basic electronics. You can follow any responses to this entry through the RSS 2.0 feed.