C002 3V Alarm Sound Module

C002 3V Alarm Sound Module

The C002 3V Alarm Sound Module is a sound generator only and does not provide a signal that directly powers a speaker. You will need to connect an additional amplifier board to the module's output.

The only extra part you need for the module itself is a 100 kΩ 1/8W or SMD resistor. The circuit board is 12 mm wide and 11 mm high. The narrow bottom side has four small copper solder pads for connecting the module. The top side has two solder pads to which you can solder the aforementioned SMD resistor. There are two pads with holes on the left and right sides where you can solder a 1/8W resistor if you can't use SMD parts.

Specifications

• Supply voltage: 2.4 Vdc ~ 3.6 Vdc
• Operating current: Max. 150 μA
• Sleep current: Max. 5 μA
• Output current: Max. 3.0 mA
• Oscillator frequency: 80 kHz ~ 120 kHz
• Operating temperature: 0 °C ~ 60 °C
• Dimensions: 12x11 mm

Pinout

• +Vb: Positive supply voltage, max 3.6 V.
• OUTPUT: Output with a square-wave signal that alternates between ground and +Vb.
• ENABLE: When this pin is open or connected to +Vb, the circuit oscillates. When this input is connected to ground, the output goes to GND.
• GND: Ground.
• Rx: Between these two connections is a resistor between 100 kΩ and 240 kΩ that determines the frequency of the output signal. The output frequency at 100 kΩ is approximately 2.8 kHz.

Sample Connections