Build Your Own PIC Servo Tester Circuit Diagram

Circuit diagram

click here to download schematic in pdf This document presents a straightforward servo evaluation device designed to thoroughly assess the functionality of a wide variety of contemporary servos. The apparatus incorporates two buttons, labelled CENTRE and SWEEP, alongside a potentiometer operating as follows:

CENTRE activates the servo and establishes its center position; subsequently, the potentiometer regulates the position.
SWEEP facilitates the movement of the servo back and forth, with the velocity governed by the potentiometer’s setting.

The microcontroller leverages its internal timer to establish a consistent frame duration of 20 milliseconds, while the on/off ratio is configurable by the user.

Have Fun-Ed

PCB board

suggested panel decal

Parts

R1 = 1K
R2 = 10K
R3 = 82R
R4 = 10K
R5 = 5K potentiometer
C1 = 27pF
C2 = 27pF
C3 = 100nF
D1 = 4.7V zener diode
Q1 = 10MHz crystal
IC1 = PIC12F675

Download assembly code (.asm)

Download PCB in Eagle format (.br )

PIC12F675

The PIC12F675 is a versatile integrated circuit from Microchip Technology. This specific microcontroller is a low-power, single-chip solution typically used in embedded systems applications. It offers a relatively simple architecture with a limited number of input/output pins, making it suitable for controlling small circuits and providing basic automation functions. Its internal oscillator allows for operation without an external clock source, simplifying circuit design. The PIC12F675 features a built-in ADC (Analog-to-Digital Converter) which allows reading analog signals, and supports various communication protocols. It's a popular choice for educational projects and hobbyist applications.

author: EdwardM, maxwatted@yahoo.co.uk
circuit from http://www.electronics-lab.com/