Ok i made a RX PWM tester with arduino because Im struggling to get PWM signal from my nano RX ESC to power the weapons. I really need to know what is being output from the PWM pads. I suck at electronics, but the reason I started insect combat robotics was to learn something about electronics ..
and this has been the biggest lesson so far! So it's all good
Video of it working here with a FrSky V8R4-II . Next to test it tomorrow night with the nano and find out why my giant weapon of death wont spin!
https://photos.app.goo.gl/9o1nqEBQbL4ofhRE6
Maybe one other builder will find the arduino code useful for checking their own RX outputs.
Or for making lil LEDs flash with your transmitter. Disco! disco! disco! disco! (my darksynth music is perhaps not actually good disco music..
)
It's not perfect, as Im mega new to Arduino, but the code is here.
Code: Select all
/* PWM RECEIVER VALUES TEST AND VISUAL LED INDICATION
* LAUNCH SERIAL MONITOR
*/
int CH1=10; /*pin 10 plug in LED 1*/
int CH2=11; /*pin 11 plug in LED 2*/
int CH3=3; /*pin 3 plug in LED 3*/
int CH4=6; /*pin 6 plug in LED 4*/
int Map1;
int Map2;
int Map3;
int Map4;
double channel[4];
void setup() {
pinMode(10,OUTPUT); /*pin 10 plug in LED 1*/
pinMode(11,OUTPUT); /*pin 11 plug in LED 2*/
pinMode(3,OUTPUT); /*pin 3 plug in LED 3*/
pinMode(6,OUTPUT); /*pin 6 plug in LED 4*/
pinMode(2,INPUT); /*pin 2 plug in RX Signal Channel 1*/
pinMode(5,INPUT); /*pin 5 plug in RX Signal Channel 2*/
pinMode(7,INPUT); /*pin 7 plug in RX Signal Channel 3*/
pinMode(9,INPUT); /*pin 9 plug in RX Signal Channel 4*/
Serial.begin(9600);
}
void loop() {
channel[0]= pulseIn(2,HIGH);
channel[1]= pulseIn(5,HIGH);
channel[2]= pulseIn(7,HIGH);
channel[3]= pulseIn(9,HIGH);
Serial.print(channel[0]);
Serial.print("--++++--");
Serial.print(channel[1]);
Serial.print("--++++--");
Serial.print(channel[2]);
Serial.print("--++++--");
Serial.println(channel[3]);
Map1=map(channel[0],975,2000,0,255);
analogWrite(CH1,Map1);
if (channel[0]<975){
digitalWrite(CH1,LOW);
}
channel[1]=(channel[1]-1500);
channel[1]= sqrt((channel[1]*channel[1]));
Map2=map(channel[1],0,500,0,255);
analogWrite(CH2,Map2);
if (channel[1]<25){
digitalWrite(CH2,LOW);
}
channel[2]=(channel[2]-1500);
channel[2]= sqrt((channel[2]*channel[2]));
Map3=map(channel[2],0,500,0,255);
analogWrite(CH3,Map3);
if (channel[2]<25){
digitalWrite(CH3,LOW);
}
channel[3]=(channel[3]-1500);
channel[3]= sqrt((channel[3]*channel[3]));
Map4=map(channel[3],0,500,0,255);
analogWrite(CH4,Map4);
if (channel[3]<25){
digitalWrite(CH4,LOW);
}
delay(100);
}
EDIT: Nano is dead on the PWM pins. Channel 3, 4 and 6 are outputting from the TX on the throttle. Arduino measuring the RX outputs on the PWM pad shows nothing
Guess I'll use this board for a pushbot and order another one.
https://photos.app.goo.gl/ZzuQHzqDTwh8Eaoh6
will bear that in mind! lol. I dont think it looks to be easy to upgrade the wires on them .... 
and no LEDs, which i thought there was on the 7A Turnigy esc. I checked the power wiring and it looked fine though. Cant remember if ESCs need a signal to come alive or not. 
I'm really loving the florescent tube lights on the underside of the cupboards. They are actually the best thing in world to see what you are doing! And only like £20 a pop