Product overview
The Rctimer PPM Encoder PWM to PPM provides a signal interface between an R/C receiver and an autopilot. It connects to the receiver’s PWM servo outputs and combines them into a PPM pulse for compatible autopilots, with Pixhawk given as an example. Installation requires no receiver modification. Its electronics use an ATMEL ATMEGA328p AVR processor with interrupt-based timing, and its design derives from the Paperazzi PPM Encoder. The free firmware comes configured to read eight channels.
The encoder board measures 28 x 19 x 5 mm and weighs 9 g including all wires, providing compact integration dimensions for the receiver-to-autopilot connection. The supplied package contains one encoder, one 60 mm 10-pin input cable and one 100 mm 4-pin output cable. The board’s jumper is unsoldered by default, a configuration in which the flight controller supplies power. Changing PPM signal inversion or predefined failsafe values requires reprogramming with an AVR ISP programmer.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | Rctimer PPM Encoder PWM to PPM |
| Signal conversion and integration | Connects to R/C receiver PWM servo output ports and converts their signals into a PPM pulse suitable for many autopilots, including Pixhawk. |
| Receiver modification | No R/C receiver modifications required. |
| Processor and timing architecture | ATMEL ATMEGA328p AVR processor with interrupt-based timing. |
| Firmware | Free firmware created by John Arne and Olivier Adler. |
| Design basis | Based on the Paperazzi PPM Encoder design. |
| Channel configuration | Pre-configured to read 8 channels.Firmware as supplied. |
| Reprogramming requirement | An AVR ISP programmer is required to reprogram PPM signal inversion and predefined failsafe settings.When changing PPM signal inversion or predefined failsafe values. |
| Power configuration | The jumper is unsoldered by default; in this configuration, the flight controller powers the board.Default unsoldered board jumper. |
| Dimensions | 28 x 19 x 5 mm |
| Weight | 9 gIncluding all wires. |
| Encoder quantity | 1 PPM encoderSupplied package. |
| Input cable | 1 × 10-pin input cable, 60 mmSupplied package. |
| Output cable | 1 × 4-pin output cable, 100 mmSupplied package. |
