RC SERVO TESTER

By : Gian Luca Comana

June 2001

 

 

INTRODUCTION

The servo testers which can be found in shops are quite expensive and the shematics published here and there do not achieve the requested precision. Most of the time they are based on the famous NE555 timer IC and are limited to one function.

The use of a PIC (here 16F84 or 16F628) gives the opportunity to build a very cheap and extended tester. Such a project costs from 10 to 30€.

With this realization, you can test a RC servo but also check its correct implementation in a RC model without having to fully deploy your  RC transmitter/ receiver. This  is quite more convenient. After all, we have only two hands....

The 16F84 (or 16F628) takes care of all functions. The use of a Xtal guaranties the precision of the timing.


SCHEMATIC

PCB

Get PCB

COMPONANTS

 

COMPONANT LIST

C100                                                    : 5.0uF  D101                        : LED BICOLOR   5mm 
C101                                                    : 0.1uF   
C102-C103                                          : 22pF  D100 1                     :N4001 / 1N4007 
   
R100-R101-R109                                 : 470  U100                        : PIC16F84 / 16F84A / 16F628 
R102-R103-R104-R105-R106-R107   : 1k   
R108                                                     : 4.7K  X100                        : 4MHz 
R110                                                     : 33K   

 

SOFTWARE

As you can use a 16F84 or a 16F628, two versions of the software are available

Download  Hex file for 16F84 version or 16F628 version

Download PROTON .Bas file

Download User Manual

 

USER GUIDE

(to be completed soon)

 

Gian Luca Comana (see this project in Italian)

June 2001

(Last revision : odb 18/11/03)

Please note that this project is published AS IS. No responsability of the author in any cases can be invoqued. This project is for learning and entretainment purpose only. No vital application can be connected to it. As this project is published on a free and friendly base for the user site of PROTON , it cannot be used in any condition for business or commercial use without explicit permission of the author.