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Simple antenna UHF rotator
Read moreElectronic parts:
1x Arduino NANO V3,
1x L298N,
1x Motor 12 V DC whit gear,
1x Linear Multi Rotation Potentiometer (1 to 10 kOhm),
1x LM35 optional,
USB Cable to Arduino Nano or RS232 to TTL Converter.
Bearings:
2x 608Z (8x22x7 mm),
2x GE 30 ES 2RS (30x47x22 mm).
Aluminium profiles: 40x40 and 20x20 mm
Watch the video on how the rotor was made and subscribe to my YTchannel.
A few photos from the assembly:
Complete clutch
Spherical bearing
Inside the housing
Large gear wheel
Electrical connection
You can download all project filesfrom HERE.
An LPDA antenna for the 2m / 70 cm bands was mounted on the rotor.
Control application running on a Linux computer. You can easily run it on a Windows computer, but remember to change the communication port settings.
VY73 de SP9MX!
const int iAzStepperRev = 200;
String sMotorSpeed = "";
int motorSpeed = 0;
int stepCount = 0;
float fAzStepperPos = 0;
int iAzStepperTemp = 0;
float fAzStepperTemp = 0;
float fMotorSpeed = 0;
int iMotorSpeed = 0;
unsigned long previousTimeStepper = millis();
unsigned long previousTimeSend = millis();
long timeIntervalStepper = 8;
long timeIntervalSend = 100;
void AZ_StepperRelase()
{
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
digitalWrite(5, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
}
void setup() {
Serial.begin(4800);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
}
void PrintValues(float &fAzTemp, float &fMotorSpeed, float &fAzPos)
{
Serial.print(iMotorSpeed, 1);
Serial.write('\t');
Serial.print(fMotorSpeed, 1);
Serial.write('\t');
Serial.println(fAzPos, 1);
}
void MoveStepper()
{
int iAzStepperPos = analogRead(A7);
fAzStepperPos = map(iAzStepperPos, 0 , 1023, 0, 8790);
fAzStepperPos = fAzStepperPos / 10.0;
fAzStepperPos = fAzStepperPos - 236.5;
fMotorSpeed = motorSpeed;
if (fMotorSpeed < 0)
iMotorSpeed = map(-fMotorSpeed, 0, 100, 100, 255);
else
iMotorSpeed = map(fMotorSpeed, 0, 100, 100, 255);
if (Serial.available() > 0)
sMotorSpeed = Serial.readString();
motorSpeed = sMotorSpeed.toInt();
if (motorSpeed > 0) {
analogWrite(11, iMotorSpeed);
analogWrite(10, iMotorSpeed);
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
digitalWrite(5, HIGH);
}
else if (motorSpeed < 0) {
analogWrite(11, iMotorSpeed);
analogWrite(10, iMotorSpeed);
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, HIGH);
digitalWrite(5, LOW);
}
else if (motorSpeed == 0)
AZ_StepperRelase();
}
void Safety()
{
if ((fAzStepperPos < -60.0 && motorSpeed > 0) || (fAzStepperPos > 270.0 && motorSpeed < 0))
sMotorSpeed = "0";
}
void loop()
{
unsigned long currentTime = millis();
//master loop
Safety();
MoveStepper();
//task 1 - send frame
if (currentTime - previousTimeSend > timeIntervalSend)
{
previousTimeSend = currentTime;
fAzStepperTemp = map(analogRead(A6), 0, 1023, -55, 155);
PrintValues(fAzStepperTemp, fMotorSpeed, fAzStepperPos);
}
}
import processing.serial.*;
import controlP5.*;
Serial magistrala;
ControlP5 cp5;
PFont font;
PImage background;
PImage dial;
float heading;
float headrad;
float strefaMartwa = 285.0;
float fAzTemp = 0.0;
float fAzPos = 0.0;
String sAzPos = "";
float fAzSpeed = 0.0;
float[] fDataUART= {};
float fSetAzSpeed = 0.0;
int iSetAzSpeed = 0;
String sSetAzSpeed = "0";
int iBorderX, iBorderY, iBorderW, iBorderH, iGateMaps;
void setup()
{
magistrala = new Serial(this, "/dev/UKF_ROTATOR", 4800);
magistrala.bufferUntil('\n');
font = loadFont("DejaVuSans-20.vlw");
background(0);
dial = loadImage("dial.png");
cp5 = new ControlP5(this);
size(1100, 600);
cp5.addButton("LEFT")
.setPosition(20, 345)
.setSize(175, 60)
.setFont(font)
.setColorBackground(color(255, 0, 0));
cp5.addButton("STOP")
.setPosition(20, 255)
.setSize(360, 80)
.setFont(font)
.setColorBackground(color(255, 0, 0));
cp5.addSlider("AzSpeed")
.setRange(1, 100)
.setFont(font)
.setHandleSize(20)
.setCaptionLabel("")
.setSize(220, 30)
.setPosition(160, 200);
cp5.addButton("RIGHT")
.setPosition(205, 345)
.setSize(175, 60)
.setFont(font)
.setColorBackground(color(255, 0, 0));
cp5.addButton("MAPA")
.setPosition(20, 500)
.setSize(175, 60)
.setFont(font)
.setColorBackground(color(255, 0, 0));
frameRate(100);
magistrala.bufferUntil ( '\n' );
STOP();
}
void draw() {
background(0);
image(dial, 525, 25, 550, 550);
//ramka statusu
fill(0, 80, 220);
rect(10, 110, 380, 75, 7);
textFont(font, 24);
//ramka prdkoci
fill(240, 240, 0);
rect(10, 195, 380, 40, 7);
textFont(font, 24);
//ramka prdkoci
fill(240, 240, 0);
rect(10, 245, 380, 170, 7);
textFont(font, 24);
//ruchoma ramka
fill(0, 0, 255);
rect(iBorderX, iBorderY, iBorderW, iBorderH, 0);
//tekst
fill(255, 255, 255);
textFont(font, 32);
text("RADIO ROTOR CONTROLER", 10, 30);
textFont(font, 24);
text("CALLSIGN: SP9MX", 10, 65);
textFont(font, 24);
text("OPERATOR: MATEUSZ", 10, 95);
textFont(font, 24);
text("ACT AZIMUTH:", 15, 140);
sAzPos = nf(fAzPos, 0, 1);
text(sAzPos, 305, 140);
text("ACT ROT SPEED:", 15, 170);
if (fAzSpeed < 0)
sAzPos = nf(-fAzSpeed, 0, 0);
else sAzPos = nf(fAzSpeed, 0, 0);
text(sAzPos, 305, 170);
fill(0, 0, 0);
textFont(font, 24);
text("SET SPEED:", 15, 225);
//promie wodzcy
stroke(255, 0, 0);
strokeWeight(4);
float pi =3.1415;
float radian = - pi*(fAzPos/180);
float x = 800-275*sin(radian);
float y = 300-275*cos(radian);
line(800, 300, x, y);
//strefa martwa rotora
//pocztek
stroke(0, 0, 255);
strokeWeight(1);
float radian2 = - pi*((strefaMartwa-15)/180);
float x2 = 800-275*sin(radian2);
float y2 = 300-275*cos(radian2);
line(800, 300, x2, y2);
float radian3 = - pi*((strefaMartwa+15)/180);
float x3 = 800-275*sin(radian3);
float y3 = 300-275*cos(radian3);
line(800, 300, x3, y3);
fSetAzSpeed=cp5.getController("AzSpeed").getValue();
iSetAzSpeed = (int)fSetAzSpeed;
println(fDataUART);
}
void LEFT()
{
magistrala.write(str(iSetAzSpeed));
iBorderX = 15;
iBorderY = 340;
iBorderW = 185;
iBorderH = 70;
}
void STOP()
{
magistrala.write("0");
iBorderX = 15;
iBorderY = 250;
iBorderW = 370;
iBorderH = 90;
}
void RIGHT()
{
magistrala.write(str(-iSetAzSpeed));
iBorderX = 200;
iBorderY = 340;
iBorderW = 185;
iBorderH = 70;
}
void importDataUART()
{
fAzTemp = fDataUART[0];
fAzSpeed = fDataUART[1];
fAzPos = fDataUART[2];
}
void MAPA()
{
if (iGateMaps == 0)
{
iGateMaps=1;
dial = loadImage("dx.png");
}
else if (iGateMaps == 1)
{
iGateMaps=0;
dial = loadImage("dial.png");
}
}
void serialEvent(final Serial s)
{
fDataUART = float(splitTokens(s.readString()));
redraw = true;
importDataUART();
}
_3u05Tpwasz.png?auto=compress%2Cformat&w=40&h=40&fit=fillmax&bg=fff&dpr=2)
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