Use it to check your servos before installing them into your models or to center your servos when setting up linkages. The Simple Servo Tester can also be tuned to precisely center your servos - Some manufactures consider 1.520 milliseconds to be center while others use 1.500 milliseconds.
Use it anytime you want to operate a servo but don't want to get out your RC equipment!
This project was designed by W9GFO. You can get the kit from Gadget Gangster and download a PDF version of this howto.
Warm up your soldering iron and get started!
Step 1: Make: Parts List
- Potentiometer Knob
- Green LED
- NPN Transistor
- Right angle pin header (9 pins)
- 555 Timer Chip
- 20k Right Angle Potentiometer
- Trim pot
- 2x Capacitors (0.1 uF)
- Custom PCB
- 220k ohm resistor (Red-Red-Yellow)
- 3x 10k ohm resistor (Brown-Black-Orange)
Step 2: Make: Potentiometer Knob
Step 3: Make: 555 Timer
Step 4: Make: Prepping the Caps & Resistors
Step 5: Make: Adding the Caps & Resistors
The 220k ohm (red-red-yellow) goes on the right. The other three 10K ohm go in the other spots. These also are not polarized - but I like to put them in with the gold bands at the bottom. It makes no difference at all - just personal preference.
Step 6: Make: Start Soldering
After soldering, snip the leads.