# Need help with this code **URL:** \ **Category:** Programming\ **Created:** [December 3, 2024, 7:20am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348 "2024-12-03T07:20:35Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![ouroboros-twinstrokeoftheend](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ouroboros-twinstrokeoftheend/32/1099504_2.png) [@ouroboros-twinstrokeoftheend](https://forum.arduino.cc/u/ouroboros-twinstrokeoftheend)\ **Post date:** [December 3, 2024, 7:20am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/1 "2024-12-03T07:20:35Z")
I have written this code to power a servo motor by using a button and arduino ide does not find any errors in it. However when i load it onto my arduino the servo motor acts like it is not running any program. I have already checked if i messed up the inputs and if the motor works with other programs. (the serial monitor code was to check if the program works in general) ```arduino `#include Servo servo; int taster = 7; int tasterstatus = 0; void setup() { pinMode(taster,INPUT); servo.attach(6); Serial.begin(9600); } void loop() { tasterstatus=digitalRead(taster); if (tasterstatus==HIGH){ servo.write(500); Serial.println("test"); } else { servo.write(200); } }` ``` ---
**Author:** ![UKHeliBob](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ukhelibob/32/215663_2.png) [@UKHeliBob](https://forum.arduino.cc/u/UKHeliBob)\ **Post date:** [December 3, 2024, 7:24am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/2 "2024-12-03T07:24:58Z")
Welcome to the forum Normal servos have a range of movement between 0 and 180 degrees. The servo.write() function takes the angle to be moved to as its parameter Can you see a problem in your code with how you use servo.write() ? ---
**Author:** ![ouroboros-twinstrokeoftheend](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ouroboros-twinstrokeoftheend/32/1099504_2.png) [@ouroboros-twinstrokeoftheend](https://forum.arduino.cc/u/ouroboros-twinstrokeoftheend)\ **Post date:** [December 3, 2024, 7:28am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/3 "2024-12-03T07:28:38Z")
I see. so the problem is that the maximum i can use is 180 and not 500? ---
**Author:** ![UKHeliBob](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ukhelibob/32/215663_2.png) [@UKHeliBob](https://forum.arduino.cc/u/UKHeliBob)\ **Post date:** [December 3, 2024, 7:44am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/4 "2024-12-03T07:44:08Z")
That's right Why do you want to use 500 ? A servo cannot move to an angle of 500 degrees ---
**Author:** ![ouroboros-twinstrokeoftheend](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ouroboros-twinstrokeoftheend/32/1099504_2.png) [@ouroboros-twinstrokeoftheend](https://forum.arduino.cc/u/ouroboros-twinstrokeoftheend)\ **Post date:** [December 3, 2024, 8:12am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/5 "2024-12-03T08:12:29Z")
I think i misread something because i thought it would stand for the speed at which it rotates so i just used a convenient number. Im not that familiar with these things. ---
**Author:** ![UKHeliBob](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ukhelibob/32/215663_2.png) [@UKHeliBob](https://forum.arduino.cc/u/UKHeliBob)\ **Post date:** [December 3, 2024, 8:20am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/6 "2024-12-03T08:20:13Z")
Try using numbers in the range 0 to 180 to get a feel for how it works. Assuming, that is, that you have got a conventional servo and not a continuous rotation "servo" unless that is what you really want You cannot control the angle of the latter type, only its speed and direction. Which type do you have/want ? ---
**Author:** ![TomGeorge](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/tomgeorge/32/215261_2.png) [@TomGeorge](https://forum.arduino.cc/u/TomGeorge)\ **Post date:** [December 3, 2024, 9:36am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/7 "2024-12-03T09:36:49Z")
Hi, @ouroboros-twinstrokeoftheend Welcome to the forum. Thanks for using code tags. 👍 👍 👍 > [@ouroboros-twinstrokeoftheend](#): > > I think i misread something because i thought it would stand for the speed at which it rotates so i just used a convenient number. Im not that familiar with these things. Can you post a link or image of your servo. Usually a **servo motor** is one that rotates continuously with encoder feedback. Then there is a **servo** , which generally is the type used in remote control for 0 to 180 degrees back and forth operation. Tom.. 😃 👍 ☕ 🇦🇺 ---
**Author:** ![UKHeliBob](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ukhelibob/32/215663_2.png) [@UKHeliBob](https://forum.arduino.cc/u/UKHeliBob)\ **Post date:** [December 3, 2024, 10:03am UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/8 "2024-12-03T10:03:29Z")
> [@TomGeorge](#): > > Usually a **servo motor** is one that rotates continuously with encoder feedback. In my experience it is unusual for a continuous rotation "servo" of the type used by members of this forum to have any form of encoder feedback ---
**Author:** ![alto777](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/alto777/32/317385_2.png) [@alto777](https://forum.arduino.cc/u/alto777)\ **Post date:** [December 3, 2024, 8:49pm UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/9 "2024-12-03T20:49:11Z")
The _write_() method is fairly smart as it converts to the internal use of microseconds. ```arduino void Servo::write(int value) { if(value < MIN_PULSE_WIDTH) { // treat values less than 544 as angles in degrees (valid values in microseconds are handled as microseconds) if(value < 0) value = 0; if(value > 180) value = 180; value = map(value, 0, 180, SERVO_MIN(), SERVO_MAX()); } this->writeMicroseconds(value); } ``` _MIN __PULSE__ WIDTH_, 544 unless changed, is threshold for seeing the argument passed as a value in time, not degrees. So both 200 and 500 are constrained to 180 degrees, then mapped into a range of pulse widths. I'm not sure that is such a good idea. I like constraining to 0 .. 180, and I do not see the advantage to the flexibility afforded by allowing, say, 1000 .. 2000 to be used and interpreted differently, mostly because anyone doing would know enough to use _writeMicroseconds_(). Chicken door openers use degrees, more sophisticated code like found in radio control stuff happily uses pulse width. _writeMicroseconds_() similarly constrains the input value, which is always nice to see but should probably not be why something works. a7 ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [June 1, 2025, 8:49pm UTC](https://forum.arduino.cc/t/need-help-with-this-code/1328348/10 "2025-06-01T20:49:52Z")
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