3153 - Audio DTMF Tone Decoder & Display with RS232 Output

Detect DTMF tones from tape recorders, receivers, two-way radios, etc using the built-in microphone or direct from the phone line (via the onboard line isolation transformer).

The numbers are displayed on a 16 character, single line display as they are received.

Up to 32 numbers can be displayed by scrolling the display left and right. There is also a Serial Output for connection to a PC. All data written to the LCD is also sent to the serial output, including the RESET and READY messages. Data is sent as standard ASCII characters.

The unit will not detect numbers dialled using pulse dialling. Circuit uses a CM8870 DTMF receiver chip and pre-programmed microcontroller. This product is NOT a caller ID unit!

Technical Specifications
Supply	9-12Vdc Regulated (Order Code PSU446)
Current consumption	<20mA @12Vdc
Display	16x1 LCD
Input	Phone line or built-in microphone
PC Serial Output	Standard ASCII characters (9600 8N1)
Dimensions	~55 x 95 x 35 mm
Board Connections	Power: 5.5 x 2.5mm DC socket Line-in & PC Serial output: solder pads
Product Formats	SELF-ASSEMBLY Electronic Kit (KT ) or PRE-ASSEMBLED Electronic Module (AS) more
Documentation	User Manual

• This product does not have BT approval