4.8-6V Servo Motor Tester /ESC Consistency Tester with Indicator Light Power This sensor can be used

This sensor can be used to detect the presence of object or any other reflective surface in front it

Features of 74LS138 - 3 to 8 Decoder De-Multiplexer IC

On the other hand

Soldering iron Features:

Can be used with both 5 and 3

4.8-6V Servo Motor Tester /ESC Consistency Tester with Indicator Light Power This sensor can be usedThe Digital Multi Servo Tester ESC RC Consistency CCPM Master Speed Control offers 3 modes to check servos or ESC. The Manual Mode allows you to turn the knob to different speeds and check the reaction time. The Neutral mode makes the servo go back to the neutral point. The Automatic Window Wiper Mode makes the servo swing like a window wiper in the largest angle possible. This servo tester can connect to up to 3 servos simultaneously. You can also