A simple arduino application for using audio and serial to control a traffic light, or other simple 3 light fixture. This was originally written for a party scenario - wanting to have lights that change with music with the ability to take manual control of the lights.
- Currently just an arduino application.
- Arduino samples from pin A0 at 500Hz and turns on three lights (D9-11) in proportion to the audio signal
- Lights are automatically scaled to changes in volume
- Any serial characters on the UART pause the VU meter operation and switch to serial mode.
- A simple serial protocol can be used to manually change the lights. After a given timeout, the arduino revers to VU meter mode.
Consists of 2 character lines delimited by '\r\n' or just '\n'. Currently not case sensitive. The current format is \r\n, where is one of the three lights - 'r', 'y' or 'g'. Possible commands:
- S(et) a light (turn it on). Eg: 'sy' will turn on the yellow light
- C(lear) a light (turn it off). Eg: 'CG' will turn off the green light
- Q(uit) will immediately exit serial mode and return to VU meter mode