RECESSIM

Civil Defense and Fire Siren Controller: Difference between revisions

← Older edit
VisualWikitext
m add discovery about adding switching functionality
Categorisation per 2026-09 category review
 
(2 intermediate revisions by 2 users not shown)
Line 235: Line 235:
         !Function
         !Function
         |-
         |-
         |'''P1-1'''
         |'''P2-1'''
         |GND
         |GND
         |-
         |-
         |'''P1-2'''
         |'''P2-2'''
         |Output, goes to programming section
         |Output, goes to programming section
         |-
         |-
         |'''P1-3'''
         |'''P2-3'''
         |Input, goes to programming section
         |Input, goes to programming section
         |-
         |-
         |'''P1-4'''
         |'''P2-4'''
         |Output to Timer, thru diode customization section between decoders (CR5 & CR8)
         |Output to Timer, thru diode customization section between decoders (CR5 & CR8)
         |-
         |-
         |'''P1-5'''
         |'''P2-5'''
         |From CR5 diode, test output? (N/C on main board)
         |From CR5 diode, test output? (N/C on main board)
         |}
         |}
Line 1,032: Line 1,032:


<br />
<br />
===DTMF Tone Decoders===
I recently became aware that at some point, CD&F made DTMF decoders that use the two tone decoder PCB and have a Norcomm NC401 module attached to them. The manual for the module can be [[:File:Norcommnc401.pdf|viewed here.]] Its based on an 8051 mcu and the classic MT8870 DTMF decoder IC. You can program various functionality and digit sequences into it.
<gallery>
File:Cdf_decoder_dtmf.jpg|An example of a DTMF decoder card
</gallery>




Line 1,058: Line 1,065:
*On the maxon data radio DB-15 connector, you can solder a normal speaker to pin 9 and GND (4) to monitor the recieve audio. You can adjust volume with RV401 onboard inside the radio, or just use an inline resistor if you are lazy.
*On the maxon data radio DB-15 connector, you can solder a normal speaker to pin 9 and GND (4) to monitor the recieve audio. You can adjust volume with RV401 onboard inside the radio, or just use an inline resistor if you are lazy.
<br />
<br />
[[Category:Communications equipment]]
Retrieved from "https://wiki.recessim.com/view/Civil_Defense_and_Fire_Siren_Controller"