Civil Defense and Fire Siren Controller: Difference between revisions
Add info about discovered DTMF modules and fix some numbering issues |
Categorisation per 2026-09 category review |
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*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. | ||
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[[Category:Communications equipment]] | |||