Test a TILT!Audio board

In order to test your TILTAudio board including the WPC bus interface to the pinball machine you can use an arduino mega board.

Just connect the mega with the TILT!Audio board like this:

Connections from the Arduino mega to WPC bus on TILT!Audio

Connecting also the 5v power line is optional. You need to choose either to power everything from on source or just skip the red 5v wire and power the 5v on the TA board and the Arduino separately.

For the address decoder (the smd chips) to work the raspberry pi needs to be plugged in as the 3v3 power for the decoder comes from the pi’s onboard regulator.

Also the resistor network RN3-5 must be installed, without them bus connections are not there. 12V can be skipped for testing, which means amps will not work, but you could also connect a speaker either to the PI’s audio jack directly or use the audio jack on the DAC module.

Then load the following ino script to the Arduino:

This way you can emulate sound effect commands to would normally come from the pinball machine.

I will upload a more detailed example on the github repo: https://github.com/sker65/tiltaudio-extensions

Connections needed:

PA0:22CD0 wpc15
PA1:23CD1 wpc13
PA2:24CD2 wpc11
PA3:25CD3 wpc9
PA4:26CD4 wpc7
PA5:27CD5 wpc5
PA6:28CD6 wpc3
PA7:29CD7 wpc1
PC0:37CA0 wpc25
PC1:36CA1 wpc23
PC2:35CA2 wpc21
PC3:34CA3 wpc19
PC4:33CA4 wpc17