A kind of motor with automatic feedback, such as a hobby RC servo.

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VirtualWire and ServoTimer2 on an Arduino Mega

I faced some problem in using VirtualWire and ServoTimer2 on a same Arduino Board. The RF module on the board work well, but the servo did not execute its operation as stated. Anyone had solution on ...
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1answer
19 views

Closing circuit from wire on a pully [closed]

I got a pulley with a wire that i wind using a little servo motor i removed the potentiometer from, when the wire is in place i want a circuit to be connected so a resistance is placed where the ...
2
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2answers
560 views

Will a large capacitor damage a circuit

I have 32 servos running from a 7.5V battery rated at 2500mAh and I'm sure that it has enough power to handle the servos, but it doesn't look like it can handle all of the servos pushing at once. I ...
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1answer
55 views

How to power servos externally in Arduino

I tried to control 2 servos with my arduino. It worked fine but if I try to control 5 servos with my Arduino, it doesn't work. I want to power up the servos externally but I don't know how to do it. ...
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1answer
88 views

Will motors cause more noise when connected to a ground plane instead of directly to batteries?

I am making a small robot using an Arduino and two servo motors. There are two ways that I can provide power to the motors: 1) Run power and GND wires from the battery holder to the motors, then ...
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1answer
66 views

Control a servo motor

I'm learning to control a servo (SG90), I read at this tut: http://www.seattlerobotics.org/guide/servos.html "The servo expects to see a pulse every 20 milliseconds (.02 seconds). The length of the ...
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1answer
84 views

Safely driving a SG90 servo with AVR PWM

I've read that servos tend to draw anywhere from 10mA to 200mA. Is there a standard configuration to drive servos using MCUs without directly connecting them to the output pins of the controller? Or ...
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1answer
33 views

Do servo motor specifications take into account the gear ratio inside?

I know this question may not belong here but I assume this is most likely where the most well informed people can help me. I am looking at buying a servo motor for a an application that must be able ...
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2answers
154 views

How many servos can I run on an ATtiny85?

This is my first time asking a question on this website, so please correct me if I'm doing something wrong... I have been working on a small project which runs three Servo motors on an ATtiny85, ...
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2answers
109 views

Why is OCR1B values are not stored?

I have following program to control two servo motors: ...
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1answer
72 views

How to increment OCR1A value in ATmega16 through hardware?

For my project I am controlling servo motors through ATmega16 micro controller. The OCR1A determines the position of motor. I want to increment the OCR1A value through a hardware switch. I tried ...
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2answers
66 views

limiting servo current consumption

The tl;dr version of my question is - how can I trade off ability to hold an exact position for current draw. The full version - I've got a battery-powered system with a servo. the servo is ...
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0answers
53 views

Need Help in creating a driver for a 220v AC Servo Motor

I am a new to electronics and have been working on to design a Motor Drive for comonly available Serveo motors like: http://www.alibaba.com/product-gs/1580332915/servo_motor_used_in_CNC_machine.html ...
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1answer
68 views

How can I determine if a servo motor is in the commanded position?

Once I have set PWM to move a servo to a particular angle, is there a way to detect that the servo has finished moving? I am concerned about situations where the servo is encountering extra ...
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0answers
70 views

Measuring 0.9V across circuit when switch is open

I have a basic circuit which is basically 4 servos connected to a 6vdc battery, and their signal is controlled by an Arduino. However, I noticed that I could measure around 0.8-0.9V across the power ...
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3answers
222 views

How does a servo hold its position without drawing too much current?

In a standard DC motor if you supply a voltage and stop it from rotating i.e. applying a heavy load, it will draw a lot of current. How is this not the case with a Servo? How does it hold its position ...
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2answers
72 views

How to select the correct DC servo motor

I have to buy DC servo motors for a project. The problem is, I dunno how I'm supposed to pick the correct one. I'm going through the datasheets from different companies, and the models they sell are ...
2
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1answer
168 views

Servomotor takes too much power so the µController (ATMEGA328P-PU) resets all the time

I have got the following circuit diagram. For a little explanation. When the button is pressed the µC is powered for about 10 sec. The µC contains code that moves the servo. When the servo is ...
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3answers
68 views

RC Servo motor power supply

In my RC servo motor datasheet the shall current is 600 mA. My Arduino cannot supply that much of current so, I decided to use an DC adapter to supply the power and arduino to control the Servo. My ...
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1answer
417 views

Problem with arduino servo

This is my first attempt to work with a servo and I'm using this tutorial. I have a "TowardPro MG996R DIGI HI TORQUE" servo directly connected to my arduino uno as follows: I also created the ...
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1answer
78 views

Holding voltage high, for monostable 555 timer pulse

First I'll mention I am an amatuer in electronics and therefore I ask for easy to implement answers. Thanks. Straight forward to my question: I want to know if there is a simple (and cheap) way to ...
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1answer
75 views

How can I isolate a servo in this circuit [closed]

I have a PIC which I am using to control a servo, I have a 5v supply for the PIC. I wish to isolate the servo from the PIC as the noise the servo creates can cause the PIC to malfunction. NOTE: I only ...
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1answer
70 views

Driving a Servo a Motor

I want to drive a servo rc motor I just purchased, I am a newbie in the electronics world. I would just like to test out the servo motor first and actually get it to move. So far I have figured out ...
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3answers
216 views

What is the difference between stepper motors and servomotors?

I am not sure I understand what the difference between a stepper motor and a servomotor is. Could someone explain this to me? Also how do these motors behave when they are paused or turned off, do ...
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1answer
138 views

Useless Machine geared motor

I am attempting to build a “Useless Machine” from scratch. Here is a video of the device: http://www.youtube.com/watch?v=Z86V_ICUCD4 . Also [if you want to], Google "The Most Useless Machine EVER! ...
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1answer
246 views

Weird servo mechanism

I want to use a servo taken by a radio-controlled car. However, I found out that wheels' rotation (front wheels) is not performed by a servo, but from a motor to move the wheels and a mechanism for ...
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2answers
93 views

How to control a servo

As servos use PWM and duration pulse determines the angle, the way to control a servo is via programming or an IC component is required?
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1answer
279 views

How do I get 5V for a Raspberry Pi from 4 D batteries?

I'm hoping to run a Raspberry Pi and a hobby servo off 4x1.5V D size Alkaline batteries. The batteries are brand new and at the moment I am measuring 6.5V from the 4 in series. I'm guessing each cell ...
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3answers
226 views

How do I easily power a “mashed-up” project?

I'm working on a hobby project that involves a Raspberry Pi (with a powered USB hub for reliable wireless), an Arduino (driving a hobby servo, controlling some LEDs, etc.), and an audio amplifier (not ...
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0answers
159 views

Analogue Hall sensored brushless outrunner motor position control

I would like to produce a low cost high power:weight servo drive using a brushless outrunner motor, like those use in radio control planes: Some of these motors leak enough magnetic flux out the ...
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1answer
324 views

How can I understand a servo well enough to build one?

I am trying to understand exactly how a servo works, so that I can build one. I bought and built a small robot arm kit, and it has five geared DC motors to actuate it. I would like to control the ...
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2answers
293 views

How to fix servo motor broken by wrong polarity [closed]

I accidentally plugged in my servo with the wrong polarity (with the order of wires being signal, ground and power). It immediately started releasing the 'magic smoke', but I managed to unplug it ...
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2answers
132 views

I need guidance with this circuit

This is the circuit i'm creating. BTW: The light pink area is a D flip flop. (From left to right) The green area is a microphone with a preamp. The signal passes through a low pass filter, with ...
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1answer
223 views

How to stop two DC motors simultaneously using limit switches

I need some help - I'm building a machine but I'm not sure of the best way of doing it. Thanks a million for your help Just to refresh my point - I've made one or two changes I have two large wire ...
3
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3answers
167 views

Determine rc servo motor resolution

I want to make a low thrust linear actuator with a cheap continuous rc servo motor and then control it with a microcontroller. The thing is, I want to find out what the minimum degrees is that a motor ...
3
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1answer
537 views

Servo amplifier for DC motors

I have an Harmonic drive and would like to design a PLL (phase-locked loop) controller for speed control of it. Here is a block diagram of a motor-speed control system based on PLL techniques: My ...
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2answers
3k views

Is there a way to stop servos from “shaking”?

Very simply, I am controlling servos(9g Micro Servos) based on some data read in from elsewhere. Everything works fine except that the servos will constantly "shake." That is, they vibrate back with ...
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2answers
231 views

Why did my laser die?

I recently hooked up a cheap laser module to a mircrocontroller (via a MOSFET), mounted on top of a couple servos. simulate this circuit – Schematic created using CircuitLab This worked ...
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3answers
413 views

Are there any microcontrollers with integrated H bridge for DIY servo?

I want to build my own servo system. It will get a PWM as input then move an object according to this input. I have a motor, potentiometer feedback, microcontroller with separated H-bridge. Since I ...
3
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1answer
188 views

How to move lot of items with one microcontroller?

How to build a project that move lot of objects like this one http://www.youtube.com/watch?v=go2mZnRPqnQ ? Note : This question was different at the begining, but it was confusing and Anindo Ghosh ...
3
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1answer
205 views

What component should I use to build my own servos?

I want to create an array of linear actuators for an art installation. The easiest thing for me would be to send a PWM for each actuator. I think of using chips like TM1809 or WS2811 those chips are ...
0
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1answer
344 views

Transistor as switch dropping voltage

I'm using an Arduino to drive two hobby servos but they draw too much current when not in use so I'm trying to use a transistor as a switch to cut the power to them when not needed. simulate ...
2
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0answers
84 views

Alternative to Digital Servo?

I recently picked up a high torque digital servo for a project I'm working on, where the servo needs to lift a bar about an inch, and hold it there, and then set it back down. The issue is that the ...
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2answers
90 views

Precision with a continous servo motor

Ok, here's my problem: I need to create a needle that can rotate continously in both directions and an infinite amount of "loops". I guess the ideal is to use a servomotor, isn't it? I couls use ...
2
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1answer
215 views

Raspberry Pi: driving Servo with PWM

I'm experimenting with a small servo motor with the raspberry pi using PWM (pulse-width modulation). My understanding is that the servo should respond to different length of pulse. I should be seeing ...
2
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1answer
589 views

How can I use arduino to control 4 motors speed and direction?

I consider this question different from others because of the variety of things I need this setup to be able to do. Description: I want to build a minimalistic motor controller capable of controlling ...
2
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2answers
220 views

Servo not working with Arduino

I've connected a servo(AS-18 acoms) to my arduino and I've uploaded the sweep example onto it. But nothing happens . Here's a pic. I've connected the positive terminal of the servo to 5V on the ...
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1answer
135 views

creating a switch using arduino's digital outputs

I'm trying to charge a simple servo that only has + and - pins. Usually I would connect it's - pin to the ground and + pin to the digital output from Arduino. This works, but the servo turns weakly ...
2
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1answer
238 views

Servo position with no pulse

I am using a PIC 16F884 to run 2 motors and 2 servos. The motors are using the onboard PWM module, and I am bit banging PWM for the servos on Timer 2. With only one servo being controlled, it ...
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0answers
558 views

Servo controlled by potentiometer using atmega328

I'm trying to control a servo using a potentiometer. I'm using an atmega328p with internal 1Mhz. The servo is on OCR1A and the potentiometer is on ADC0. I'm getting a 50Hz PWM on OCR1A but it ...