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Because of the high number of digital inputs, looks like I'll need a Arduino Mega 2560 for this. (Ordered 1/6/2020.) The Mega 2560 has 53 digital I/O pins.
| Zero Throttle outer | When throttle is at extreme zero (requires moving stick left past stop), connects Cannon r to Canon K (ground). |
|---|---|
| Jettison Arm | Is DPDT. When closed, 1 connects to 3, and 2 connects to 4. Pin 2 is not available at Canon plug, instead, it is connected to Jettison pin 1. |
| Jettison | When Jettison Arm is closed, Jettison pin 2, (Canon J) goes to level of Jettison Arm pin 4. |
(Dash on Canon label means untested)
| Canon Plug Pin | Control | Line | Arduino Connection | Hardware Connector |
|---|---|---|---|---|
| A | Speed brake | Open | 44-D26 | J1-1 |
| B | Speed brake | Common | 44-Gnd | J1-2 |
| C | Speed brake | close | 44-D27 | J1-3 |
| D | Rudder trim | Right | 44-D28 | J1-4 |
| E | Rudder trim | Common | 44-Gnd | J1-5 |
| F | Rudder trim | Left | 44-D29 | J1-6 |
| G | Handle Mic (Common) | Center | 44-Gnd | J1-7 |
| G | Zero Throttle inner | Common | 44-Gnd | J1-7 |
| H | Flaps | Up | 44-D32 | J2-1 |
| J | Ignition red | 2 | 44-D36 | J2-6 |
| K | Elevator trim | Common | 44-Gnd | J2-3 |
| K | Flaps | Common | 44-Gnd | J2-3 |
| K | Zero Throttle outer | Common | 44-Gnd | J2-3 |
| K | Ignition red | 1 | 44-Gnd | J2-3 |
| L | ? Unknown light | ? | ? | |
| M | Handle Exterior Lights momentary and on/off | common | 44-Gnd | J4-5 |
| N | Handle Mic ICS | Black | 44-D34 | J2-4 |
| P | Handle Mic UHF | 2 | 44-D37 | J2-5 |
| R- | Light upper right main panel | tip | NC | NC |
| S- | ||||
| T- | ||||
| U- | ||||
| V- | ||||
| W- | JATO Arm Light | 1 | NC | NC |
| X | Throttle pot | Red | 44-5V | J4-1 |
| Y- | ||||
| Z | Jettison Arm | 4 | 44-Gnd | J3-1 |
| a | Jettison Arm | 3 | 44-Gnd | J3-2 |
| b- | ||||
| c- | ||||
| d- | ||||
| e | Jettison Arm | 1 | 44-D38 | J3-3 |
| f- | ||||
| g | Handle Exterior Lights momentary and on/off | center | 44-D44 | J4-6 |
| h | Elevator Trim | Pull | 44-D40 | J3-4 |
| i | Elevator Trim | Push | 44-D41 | J3-5 |
| j | Jettison | 2 | 44-D42 | J3-6 |
| k | Flaps | down | 44-D33 | J2-2 |
| m- | ||||
| n- | ||||
| p (red) | Throttle pot | Black Wiper | 44-A0 | J4-2 |
| q (blk) | Throttle pot | White | 44-Gnd | J4-3 |
| r | Zero Throttle outer | Normally Closed | 44-D45 | J4-7 |
| s- | Zero Throttle inner | Normally Closed | - | - |
| t- | Center | |||
| !1 | Jettison Arm | 2 | - | - |
| !1 | Jettison | 1 | - | - |
| ? | JATO Arm Light | 2 | NC | NC |
