= HOW IT WORKS =

• Use the DTMF lib to detect DTMF codes received from a HAM radio (baofeng UV-B2 or any appliance that can output signal with DTMF through a jack)
• The DTMF lib has been modified to return wheter a signal without DTMF has been detected (source https://forum.arduino.cc/index.php?topic=121540.0)
• if signal is detected then UP() the relay
• if DTMF code is '0', down() (and sleep for 2 seconds to avoid to up the relay imediately because of signal presence)
• if DTMF code is '*', lower brightness
• if DTMF code is '#', higher brightness
• for any other code, just up() the relay
• Each time the relay is up(), a 5 minutes timer is reset
• After 5 minutes being UP the relay is shutdown

= SCHEMATICS =

== SPEAKER ==

=== Kenwwod double jack pinout ===

=== Schematics ===

╔═══[sleeve]══╬══[ring]══╬══[tip]══╡
║
║
╟─[SPRK-]─┼─[ring]─┼─[SPRK+]─┤
║
║



[VCC=5V+]──────┐
               │
             [R1=1k]
               │
[SPK+]─────────┼──[ARDUINO A0]
               │
             [R2=1k]
               │
[SPK-]─────────┤
               │
[GND]──────────┘

== RELAY == Using 2x5m led strip controlled by a IRF540 MOSFET though ARDUINO PWM output

[VBAT+]──────────┬───────────────┐
                 │+              │+
             [LED STRIP1]  [LED STRIP 2]
                 │-              │-
[IRF540: DRAIN]──┴───────────────┘ 
                 X─[IFR540: GATE]─┬─[R=1k]──[ARDUINO D11]
[IRF540: SOURCE]─┐                │
                 │              [R=10k]
[VBAT-]──────────┤                │
[GND]────────────┴────────────────┘

== ARDUINO == Using Arduino Nano with a 3S Lipo battery

[ARDUINO GND]─────────[VBAT-]
[ARDUINO VIN]─────────[VBAT+]
[ARDUINO A0]──────────[SPK+]
[ARDUINO D11]─────────[R=1k]──[IFR540: GATE]