Raspberry PWM LED Control: Difference between revisions
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* https://electronicshobbyists.com/raspberry-pi-pwm-tutorial-control-brightness-of-led-and-servo-motor/ | * https://electronicshobbyists.com/raspberry-pi-pwm-tutorial-control-brightness-of-led-and-servo-motor/ | ||
We'll use GPIO Pin | We'll use GPIO 24/ Pin 18 to drive the LED as in the default configuration of rc-dukes. | ||
[[File:Raspberry-pi-pinout.png|400px]] | |||
[[File:PILEDPWM-2019-06-21.png|400px]] | [[File:PILEDPWM-2019-06-21.png|400px]] | ||
We are going to use the Servoblaster software | |||
see {{Link|target=Self_Driving_RC_Car#Servo Interface - Servoblaster}} | |||
<source lang='bash'> | |||
cat /run/servoblaster.status | |||
p1pins=7,11,12,13,15,16,18,22 | |||
p5pins= | |||
Servo mapping: | |||
0 on P1-7 GPIO-4 | |||
1 on P1-11 GPIO-17 | |||
2 on P1-12 GPIO-18 | |||
3 on P1-13 GPIO-27 | |||
4 on P1-15 GPIO-22 | |||
5 on P1-16 GPIO-23 | |||
6 on P1-18 GPIO-24 | |||
7 on P1-22 GPIO-25 | |||
</source> | |||
GPIO 24 has Servoblaster Id 6 so | |||
<source lang='bash'> | |||
echo 6=120 > /dev/servoblaster | |||
</source> | |||
will set the LED to half bright | |||
[[Category:Raspberry]] | [[Category:Raspberry]] | ||
Latest revision as of 20:39, 22 June 2019
We'll use GPIO 24/ Pin 18 to drive the LED as in the default configuration of rc-dukes.
We are going to use the Servoblaster software see Self_Driving_RC_Car#Servo Interface - Servoblaster
cat /run/servoblaster.status
p1pins=7,11,12,13,15,16,18,22
p5pins=
Servo mapping:
0 on P1-7 GPIO-4
1 on P1-11 GPIO-17
2 on P1-12 GPIO-18
3 on P1-13 GPIO-27
4 on P1-15 GPIO-22
5 on P1-16 GPIO-23
6 on P1-18 GPIO-24
7 on P1-22 GPIO-25
GPIO 24 has Servoblaster Id 6 so
echo 6=120 > /dev/servoblaster
will set the LED to half bright