RaySspaController
Teensy-based solid-state power amplifier controller for 1–4 LDMOS modules with per-module bias, fast protection, and temperature-aware fan management via a Nextion touch UI. Includes serial and TCP/IP remote interfaces.
Overview
RaySspaController provides complete control and protection for high‑power LDMOS amplifier systems. It scales from one RF deck to four, with independent bias switching, current sensing, SWR/over‑drive protection, and temperature‑based fan control.
Limits, module count, and calibration are adjustable from a hidden manufacturer screen. Manufacturer configuration can also be preloaded from SD for fast provisioning.
Designed for local and remote operation via serial or TCP/IP, ideal for modern SSPA builds and remote stations.
At a Glance
- • 1–4 RF modules with independent bias
- • Per‑module voltage/current/temperature sensing & protection
- • Temperature‑aware PWM fan curves
- • SWR and over‑drive trip detection
- • Serial & TCP/IP remote interfaces
- • Hidden manufacturer screen + SD preload
Band Detection
Auto Detect – Frequency
- Automatic band selection based on rig frequency
- Intended for seamless operation with modern radios
Serial CAT
- Yaesu / Kenwood / FlexRadio / Icom
- Maps CAT frequency to band & LPF profile
Voltage (Icom)
- Band‑voltage input compatible with Icom radios
- Simple, robust detection method
Key Features
Modular Control
- Supports 1–4 LDMOS modules
- Independent bias & trips per module
- Current and voltage sensing & trips per module
- Imbalance detection (~10%)
- Temperature sensing & trips per module
Temperature Management
- ADS1115‑based thermistor inputs (10 kΩ NTC)
- 1-Wire (DS18B20) inputs
- PWM fan curves by temperature
- PTT‑aware sampling & UI gating
Bias & Protection
- Smart high‑side switch per module
- Diagnostic feedback to MCU
- Fast cut‑off for SWR / over‑drive / over‑current / over‑temp
- Configurable alarm thresholds
UI & Remote
- Nextion touch UI
- Serial & TCP/IP monitoring and control
- Hidden menus (Alarms, Config) revealed by unique tap pattern
Band & LPF Control
- LPF relay driver bank (ULN2803A)
- Profiles aligned to HF band plans
- Works with auto/serial/voltage detection
Board & Ecosystem
- Single system board integrates cleanly with RF StateSide modules or 3rd‑party gear
- RayCoupler: RF forward/reflected power + hardware interrupts
- RayRigAntSw: radio & antenna selection; separate PTTs per radio
- RayRailSwSense: switching & current sensing (≤35 A) for LDMOS drain voltage
Quick Specs
- Modules: 1–4 independent bias channels
- Voltage/Current: Configurable per module (ecosystem 35 A rail option)
- Temperature: Configurable per module – ADS1115 + 10 kΩ NTC thermistors or 1-Wire (DS18B20)
- Protection: SWR, over-drive, over-current, over-temp (configurable thresholds)
- Band Detect: Auto (freq), Serial CAT (Yaesu / Kenwood / FlexRadio / Icom), Voltage (Icom)
- Hidden manufacturer screen; SD preload support
Downloads
Coming soon: wiring guide, pinout diagram, and firmware setup.
Gallery
Example placeholders for RaySspaController UI and hardware layout.
Interested in RaySspaController?
Whether you're building a solid-state HF amplifier, upgrading an existing design, or need a flexible controller platform, RaySspaController can accelerate your development. Reach out if you'd like to evaluate the firmware or discuss integration with your hardware.