| Pin | Component | Comments |
|---|---|---|
| 14 | Camera | USB Host |
| 16 | Camera | USB Host (1) |
| 18 | -ve left channel | Speaker (2) |
| 20 | +ve left channel | Speaker (2) |
| 22 | -ve right channel | Speaker |
| 24 | +ve right channel | Speaker |
| 25 | Sonar Digital Control | Pin x on sonar |
| 27 | Sonar Analog in | Pin x on sonar |
| 29 | Humidity Analog | |
| 31 | Temp Analog | |
| 41 | Microphone | ground/shield |
| 45 | Reset | reset bitsy (power cycle)(3) |
| 46 | USB camera power | +ve |
| 48 | Bitsy Input power | +ve |
| 50 | Ground | shared w/camera & humidity sensor |