DTMF-ENC16
www.icircuits.com
Electronics / Audio

DTMF-ENC16

$139.00
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Intuitive Circuits

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Description: DTMF-ENC16 is an inexpensive, self contained, DTMF (dual tone multiple frequency) encoder board with a full size 16 button keypad. The board has a standard RCA audio out jack and can either be powered with a 9 volt battery or through the 2.1 mm DC IN jack.   Specifications: Dimensions: 2.8" x 3.0" x 1.5" Weight: 4.2 oz. (without 9 volt battery installed) Input voltage: 8.0 to 14.0 volts DC (17ma max, 10ma idle) Operating temperature: -20 C to +60 C Output Level:   Line Level 0 to -5 db (default),   Mic Level -45 to -50 db Button contact life: 1,000,000 cycles per key Keys: 0123456789ABCD*# Configuration: The audio output level can be set to microphone or line level via internal jumper J1. To access the jumper remove the four screws on the two sides of the enclosure.   Jumpered: Line Level 0 to -5 db (default)Unjumpered: Mic Level -45 to -50 db   Operation: While pressing any one of the 16 keypad buttons a mixture of two sinewave tones are generated on the "AUDIO OUT"

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