Modules / Avionics / Transponder Panel — Trig TT21 Style
Photo coming
Transponder Panel — Trig TT21 Style
Est. $285
Estimated price; final pricing when the module ships
A Trig TT21-style transponder with a full-color display showing the current squawk code and mode. Code entry uses a quadrature encoder, and it stays in two-way sync with X-Plane 12.
The display redraws only what changed, so it stays responsive. It uses a black background so it doesn't light up the cockpit in a dark room.
Features
- Live squawk code and mode display
- Encoder-based code entry
- Two-way sync with X-Plane 12
- Black-background display
BATD requirements this module relates to
- B.3.2.1(5) Transponder
- B.3.4.1(17) Displays current code
Technical
| Interface | USB |
|---|---|
| Simulator | X-Plane 12 via SummitBridge |
| Identification | Unique device ID, module name and firmware version reported to SummitBridge |
| Sync | Two-way; the sim is the source of truth |
| Display | Black background; powers with sim avionics |
| Category | Avionics |
DIY builders: Summit modules work with the same SummitBridge software as our turnkey builds. See the certification roadmap for where the BATD effort stands.
Pairs well with

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ADF receiver with frequency display, mode buttons and tuning knob.
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