Description:
This circuit uses a UM3561 IC to produce four different sound effects.
Circuit Diagram
Notes:
Author: Andy Collinson, anc@mitedu.freeserve.co.uk
Source http://www.zen22142.zen.co.uk/
This circuit uses a UM3561 IC to produce four different sound effects.
Circuit Diagram
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.
Source http://www.zen22142.zen.co.uk/
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