Hello. I'm new to all this, and I'm trying to get a servo (pin 6) to loop movement after it receives input from pin 2. However, the servo starts the loop as soon as setup finishes.
// C++ code
//
#include <Servo.h>
int poop = 0;
Servo servo_6;
int counter;
void setup() {
servo_6.attach(6, 500, 2500);
pinMode(LED_BUILTIN, OUTPUT);
pinMode(2, INPUT);
servo_6.write(0);
// countdown to active- sleeby mode
delay(1000); // Wait for 3000 millisecond(s)
// wakey mode now primed-wait for power to commence
digitalWrite(LED_BUILTIN, HIGH);
delay(500); // Wait for 500 millisecond(s)
digitalWrite(LED_BUILTIN, LOW);
}
void loop() {
if (digitalRead(2) == HIGH) {
;
servo_6.write(90);
delay(1000); // Wait for 1000 millisecond(s)
;
servo_6.write(0);
delay(1000); // Wait for 1000 millisecond(s)
}
}
How is pin 2 wired to the switch ?
is there a pull up somewhere?
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Unexpected servo behavior is usually due to an inadequate power supply, like trying to use the 5V Arduino output for servo power. A separate power supply is the solution, but don't forget to connect the grounds.
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This may keep some money in you pocket and save the trash haller some work.
Gil's Crispy Critter Rules for Processor Hardware:
Rule #1: An Arduino is NOT a Power Supply!
Rule #2: Never connect anything inductive (motors, speakers) directly to an Arduino!
Rule #3: Avoid connecting or disconnecting wires while the power is on.
Rule #4: Do not apply power to any pin unless you are certain of what you're doing.
Rule #5: Do not exceed the maximum voltage ratings.
Rule #6: Many Arduinos cannot power transmitters directly.
Rule #7: Before powering your project, take a break and double-check the wiring.
LaryD’s Corollaries:
Coro #1: When starting out, add a 220Ω resistor in series with both input and output pins to protect against shorts.
Coro #2: Invest in a Digital Multi-Meter (DMM) to measure voltages, currents, and resistance.
Note: Violating these rules can turn your Arduinos into crispy critters. For optimal performance, keep your wires under 25 cm (10 inches).
Additional Tips:
The L293 motor driver, though common, is inefficient as it can lose around 3V as heat when driving both legs of a motor. Consider using a motor driver with MOSFET outputs to reduce heat loss and conserve battery power.
For more on powering Arduino boards, explore this guide: Powering Alternatives for Arduino Boards.
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I change my design just a little. The 4N35 is triggered by an alarm clock i hijacked (12v, 2a) Before I do something incredibly stupid...
