How to make the UM3561 siren sound generator
The UM3561intergrated circuit is based on a low-power CMOS
LSI design. It is included programmed mask ROM to generate three siren sounds
and machine-gun sound.[1][2] Its siren type depends on SEL1 and SEL2 pins voltage levels.
The required voltages of IC playing modes are listed in table 1. The typical
operating voltage is 3V and its operating voltage range is 2.4V to 3.6V.[1][2] IC
operated by an RC oscillator and it needs to fix to the external resistor. The
resister pins should be fixed in between OSC1 and OSC2 pins of the UM3561 IC.[1][2]
Figure 2 is the three sound application circuits. (1: Police
Siren, 2: Fire Engine Siren, 3: Ambulance Siren)It has a three-position toggle
(ON-OFF-ON) switch to select the siren sound and a sliding switch is used to
power up the circuit. You can select a suitable type of switch according to
your required application in your project. ( eg.you can use the Push-button
switch for momentary situations)
Required item list for this activity.
- 300KΩ (Orange, Black, Yellow,) Resistors - 1
- 10KΩ (Brown, Black, Orange,) Resistors (or 1KΩ (Brown, Black, Red,) for loud sound siren out) - 1
- UM3561 (IC) - 1
- 8Ω, 0.5W Speaker - 1
- 2SD400 Transistors - 1
- 3 Pins mini SPDT Slide Switch / (ON/OFF)/suitable for breadboard - 1
- 3 Pins Single pole three-position toggle switch / (ON/OFF/ON) - 1
- Solderless Breadboard - 1
- 1.5Vx2, AA Type Battery Holder with Batteries - 1
- Jumper Wire - 1m
- Four Pin Header Strip (from Male Breakable Pin Header Strip) - 1
- Soldering Iron & Solder Wire (~20cm) - 1
Appendix:
- Type of switches used in this circuit.
Reference :
- [1]: UM3561, Three Siren Sound Generator, Data Sheet, UMC corporation ( Unicorn Microelectronics).
- [2]: UM3561A Three Siren Sound Generator, Data Sheet, BOWIN ELECTRONIC COMPANY.
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