ReadyToSky 180 Degree Servo Travel Expander

A small inline module that sits between a receiver channel and a servo and stretches the standard 1000–2000 µs PWM signal to 500–2500 µs, so servos rated for 180° reach their full travel. It suits payload-release servos, robot arms and model sailboats driven from radios that only output 1000–2000 µs.

Key features

• Maps a 1000–2000 µs input to a 500–2500 µs output, doubling the usable pulse span
• Runs from 3.6 V to 16 V, covering 5 V receiver rails and high-voltage servo supplies
• Handles PWM frame rates from 20 Hz to 500 Hz, for analogue and fast digital servos
• Plug-in fitting on a three-pin lead with nothing to programme

Specifications

• Input signal: 1000–2000 µs PWM
• Output signal: 500–2500 µs PWM
• PWM frequency: 20–500 Hz
• Operating voltage: 3.6–16 V
• Board size: 25 x 9.5 mm
• Weight: 2.8 g

Flight controllers that let you set servo endpoints in software may not need it; it earns its place behind receivers and radios fixed at 1000–2000 µs. Confirm the servo itself is rated for 500–2500 µs first, since driving a narrower-range servo past its end stops can stall and damage it.