This project can help a R/C model builder or robotic enthusiast to check and select the best servo testing it's power consumption and behavior before using it into a model or a robot.

To do it's work, Servo Tester uses an external power source (i.e. a LiPo) to provide your servo with 6.1, 5.4 or 4.7Vcc, an ammeter module INA219 and a TFT color display (128x160px) connected to an Arduino. 

A potentiometer and some buttons complete the device.

The Servo Tester has 3 main functions:

1. In Manual mode you can check the fluidity of the movement (from 100% to 200% of it's stroke) during slow movements looking also at every strange (and dangerous) noise.
2. The Auto mode can be used to compare the power consumption of a servo with it's electrical specifications or to the power consumption of another one of the same size (for example 2 mini-servos) and kind (for example 2 digital servos).
3. The On Board system test is useful to estimate the right energy of on-board battery (Wh) you will have to use

Due to the upper current limit of the INA219 (2A max) this project is not recommended for huge servos (High-Torque, Giant Scale, ecc) but works very well for all the other servos on market.

The project includes:

• complete description and personalization
• Arduino C++ code 
• links to buy the components
• schematic
• PCB & Gerber files
• charger module for external LiPo battery

If you are interested click Servo Tester project

Have fun!