DCI1C DTMF Controller Interface

[jahollins]

This is a very nice unit and works well. One feature that would be useful is a momentary (pulsed) relay closure in addition to the continuous closure. Could this feature possibly be programmed into the micro-controller U1?

[RDEngineer]

The DCI1 has been around for a number of years and proven itself. Could the code be changed to provide a pulsed output? Yes it could be done but it would involve not only chages in the code but also the isntruction manual and additional configuration optinos in the current operaton. WHile this may sould like minor changes it actually requires a significant amount of engineering time and manual changes. Unfortunatly while the DCI1 is a nice product and has may applications the effort required would not be cost effective.

If you checkout the new DCI2 you will find that it has a latching and non-latching configuration along with other functionality, output is actve only when tone is present in non-latched configuration. There are no relays on the DCI2 but you can use all 16 DTMF tone combinations and therefore can control 16 devices. The addition of a simple relay output is all that is required to control a high current device. We include all the information on how to do this. Also watch for our new line of interface/hobby circuit kits coming soon to our product line. Included will be new timer circuits, relay interfaces, optically isolated drivers and binary encoder and decoder interfaces all on standard footprint format boards. Hopefully around the first of 2010.

[WIREBRAIN]

I USED 2- 2POLE 12V COIL RELAYS AND A 10,000 uf CAPACITOR TO MAKE THIS CONVERSION. THE REAY#1 PULLS IN RELAY "A" THEN RELAY "A" SWITCHES THE CAP TO ACTIVATE RELAY "B" UNTIL THE CAP IS DISCHARGED(WHICH ACTS MOMENTARILY). THE CAP IS RECHARGED WITH A N/C CONTACT ON RELAY "B". TO ALWAYS USE THIS SCHEME USE THE OTHER N/C CONTACT TO INTERRUPT THE POWER (12VDC) (THUS RESETTING THE DCI1C) TO THE DCI1C. THIS CAUSES RELAY#1 ACTIVATION TO PRODUCE A MOMENTARY CLOSED ACTION. ONLY RELAY 1 IS MODIFIED; 2,3 & 4 ARE AS ORIGINAL KIT WAS MEANT TO BE.
THE CAP NEED NOT BE 10,000 uf TRY WHAT YOU'VE GOT. IF YOU CAN READ A PDF LET ME KNOW AND I'LL GET THE SCHEMATIC TO YOU.