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1
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0answers
74 views

Regulating voltage at end of 200 foot 120 V AC extension cable [migrated]

I am needing to drill some anchor bolts into concrete using an electric Hammer Drill (Electrical Rating 120VAC / 60Hz / 10A). I am working in a warehouse, and the worst case scenario, the furthest ...
1
vote
0answers
41 views

How to learn Control systems? [closed]

I have been astonished by Control theory and, its applications like the inverted pendulum, and the various control projects that use gyroscopic effect for stabilization, and i am avidly trying to ...
2
votes
2answers
112 views

First two byte of Transmit Buffer which sent by STM32 to Motor Controller is transfered wrong

I want to use STM32F407VET6 board to send commands to Roboteq Motor Controller MDC2230 and I'm very newbie in embedded systems. Firstly, I created my project via ...
0
votes
1answer
25 views

How to find system overshoot (Mp) from Bode diagram

In some questions (in linear control theory) it is desired to design a controller to change the system overshoot (Mp), my question is: Is it possible to find Mp or damping factor directly from ...
0
votes
1answer
35 views

Connecting a computer fan controller for multiple 12V DC fans to 120V AC

I would be interested to control multiple fans in an application that is outside a computer. I didn't find any interesting product for controlling multiple 12V 120mm fans that I could connect to 120V ...
1
vote
0answers
45 views

Micro controllers with high speed switching capabilities

I am planning a ESC for use with a 5500KV brushless motor, running on duel 4 cell Lithium Polymer batteries, I have noticed that in most speed controllers they use an Atmega to control the switching ...
0
votes
4answers
159 views

Why is zero represented by 4mA in 4 - 20 mA industrial control systems?

Ideally, to drive a controller the required current must be just above 0 mA. However, practically we consider readings only taken from 4 mA as the valid data sets. Now, my question is why do we take 4 ...
1
vote
4answers
117 views

Electronic switch with negative and positive voltage

I want to use a micro-controller to send data through a max232 that will convert the 0v/5v signals into -12/+12v signals. The problem with this IC is that when there's no signal, it sends a +12v ...
-3
votes
2answers
68 views

How do you find the transfer function of a controller?

Below is a block diagram of the system. I thought the circle symbol with the plus and minus sign was an op-amp but I'm not sure whether that's the case. I want to find the closed loop transfer ...
0
votes
0answers
37 views

Voltage stepdown spikes in solar power system during night time

Intro: I have a personal weather station out in the mountains, so going out everyday to fix things is difficult, and it runs on solar power. I have a pro star charge controller, which has low and high ...
1
vote
2answers
112 views

DC Motor Speed Control Board

I have a 120VAC DC motor speed controller (diagram attached as picture) it works very well, however in the circuit there is a 5000K POTENTIOMETER that controls the actual speed/voltage - The ...
0
votes
1answer
75 views

One battery discharges faster than the other in my solar power system

So, I have solar power system and it is as follows: 2 AGM batteries each 100 Ah 2 solar panels 24-Volt , 250 Watts each a controller an inverter the batteries are connected in series to give a ...
0
votes
1answer
39 views

A question about a speed-controller

I need to use this controller with an external applied voltage to control a fan: http://docs-europe.electrocomponents.com/webdocs/1394/0900766b81394cac.pdf Currently it is controlled manually by a ...
1
vote
1answer
75 views

Difficulty in understanding charge controller for solar and wind energy

I am having difficulty in understanding one control box which is used to charge the battery using solar and wind energy as well as power the load at the same time. I have attached the picture below ...
0
votes
1answer
124 views

How to improve my digital filter to extract DC from noises?

Digital filter description: The filter's input are sensor data and output will be provided to a PID controller. Sampling rate: 64kHz Noises spectrum: from DC to 10kHz Filter target: to get DC ...
-5
votes
1answer
79 views

How to build an Electric Vehicle (explain like I'm five) [closed]

I'm a business major investing time to learn more about Electric Vehicles. For starters, I wanted to understand the elements that come together to make a simple Electric Vehicle, maybe a scooter. I ...
-3
votes
1answer
77 views

Terabyte memory controller ICs [closed]

I am thinking of creating a PCI-Express card to support from 1TB up to 8Terabytes of RAM (for servers). I will have to modify glibc in order to use it, but it is not a problem. The problem is to make ...
0
votes
3answers
144 views

Is it possible to directly interface a MEMS ADMP541 microphone over I2S with any Microcontroller?

I have bought a MEMS ADMP541 Evalution kit to record voice samples with arduino controller MEMS microphone will produce digital o/p , I2S communication protocal My question is should I directly ...
0
votes
3answers
105 views

Looking for right component in my simple diagram

I am not electical engineer therefore stumbled upon this simple issue. In need to activate a 120VAC 1HP motor from sprinkler timer that has 4 individual channels providing 24VAC up to 400mA voltage ...
0
votes
1answer
88 views

designing PID controller using Ziegler Nichols algorithm

I'm trying to use Ziegler Nichols algorithm to design PID controller for the following transfer function: G=w^2/(2*xws+w^2), w=1 , x=0.2. so since the step response for this function is a second ...
0
votes
1answer
67 views

digital controller design and mapping analog signal to digital integer values

I have a specific situation i am trying to wrap my head around but i think it should have a general formalism to address the problem. I have designed a BiQuad controller for a buck converter and i ...
-5
votes
3answers
321 views

9-pin mini-DIN - zero resistance between some pins [closed]

There's a volume knob connected to a speaker system with 9-pin mini-DIN. The volume knob contains potentiometer to control volume and is also in charge of turning the system on and off (by turning the ...
0
votes
2answers
115 views

3.3 powered microcontroller interface with 5V powered ADC

I want to use uC LPC1769 (3.3V powered) for interfacing with 5V or 3.3V powered ADC. Controller --> LPC1769 ADC --> AD7705 If we power ADC7705 with 5V, then Vref = 2.5V. But, if we power ...
0
votes
1answer
408 views

Is it possible to control a DC motor with Microstepping driver?

Today I found that electronics dealer have shipped me a Microstepping controller (A4988 -module: http://www.robotshop.com/media/files/PDF/datasheet-1182.pdf -on-board chip: https://www.pololu.com/...
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votes
1answer
117 views

charging batteries with automatic car charger through solar charge controller [closed]

Rustic cabin off grid. Seperate wiring for 110AC and 12VDc. Using solar panel through a Steca PR1515 charge controller to charge 2 12v batteries in parallel. If not enought light (at night) to charge ...
1
vote
1answer
72 views

Unused Ethernet pins

I want to use the LAN9500AI controller in an application. This is a USB <-> Ethernet bridge with access to the MII interface. Since I just need the USB and MII interface, the ethernet interface (...
0
votes
2answers
64 views

PWM led controller

I need to control 12V/10W led brightness by a pwm signal. I know I can do it with an arduino and some TIP120 or another power transistor, but the question is, is there another method to generate a 95% ...
0
votes
2answers
194 views

Self-Tuning PID Controller to implement in a PLC without having the plant model?

I need to implement a Self-tuning PID controller in a PLC. I know the behavior of the plant (I mean, I know that if the speed is reduced the tension get high and vice versa), but I do not have a ...
2
votes
5answers
530 views

Understanding a PID controller

I have a couple of questions regarding the PID controllers; maybe it is that I have not understood the concept very well. I will formulate my question with a case: I have a system which consists of ...
0
votes
1answer
57 views

How Home HVAC controller send commands for Cooling, Heating?

i want to know how the Hvac controller sends commands to the hvac for cooling and heating. i mean when we push on + or - button for example to adjust the temperature, what happens on the other side? ...
0
votes
1answer
180 views

Gradually increase and decrease voltage on this circuit

I am using this circuit for a model lift up and down functionality. Vin is +12V. The output voltage is controlled by the 10K linear potentiometer that varies the final output from 3V to 12V. The DPDT ...
3
votes
8answers
424 views

Why are there only PID controllers, no PIIIDDD (higher order) controllers?

Transfer function of a PID controller is: \$I\cdot s + P+\dfrac{D}{s}\$ Are there controllers like: \$A\cdot s^2 + B\cdot s + C+\dfrac{D}{s} + \dfrac{E}{s^2}\$ ? If so, are they common? Why do ...
3
votes
1answer
86 views

Use different footprint for a SATA connector

I am designing an Linux Board which needs a SATA connector. Now im faced to choose between 2.5 HDD SATA connectors and the new mSATA (mini PCI express) connectors. For compatiblity and usuabillity ...
1
vote
1answer
101 views

How to calculate solar panel setup?

I have an equipment which draws 550W at a constant level, no peaks. I want to power this unit with solar cells only during the day when there is light using a simple car battery. Because I don't want ...
0
votes
1answer
622 views

Difference between a controller (e.g PD) and a compensator(e.g Lead)?

Really.What is it?Can't find anything anywhere related to it...Please don't give fancy examples.Just tell me the difference
0
votes
1answer
175 views

microphone to a microcontroller. very simple

I want to take a microphone and send it to a micro controller. I then want that microcontroller to evaluate if the audio is above a set db reading and then send a yes or no single to turn on a light. ...
0
votes
2answers
243 views

Drum trigger controller

I'm planning to make a drum controller (something like arduino) for pc using a piezo transducer as sensor, some electronic circuit, keyboard PCB connected to usb and sampler for drums in pc. I found ...
-2
votes
1answer
49 views

Ethernet Generic Controller [closed]

I am a Software engineer and I need to make some program (TCP/IP client) that connect to Ethernet with more than one Ethernet controller devices (TCP/IP Server) that control some electrical components ...
-3
votes
1answer
84 views

How to controlle a motor with arduino

I have 2 og those 12v motor and a 12v battery http://www.enigmaindustries.com/Motors/Bosch_EV_Warrior.htm I want to know what s the best solution to controle the motor with an arduino Uno. Is the ...
1
vote
1answer
110 views

What do I need A0 in a USB Controller (PDIUSBD12)?

I'm reading the datasheet of the USB controller PIDUSBD12, but I can't understand what the goal of the A0 pin. In the controller there is a data bus (D0-7) and this A0 pin, the datasheet says that ...
2
votes
1answer
1k views

What is the difference between a Controller and Microcontroller?

I read, that I need to use a controller, if I want to communicate with a device over Input/Output Adressessing. It is sad, that I need 3 steps: Put the I/O-adress on the motherboard bus The hardware ...
0
votes
1answer
53 views

What is a disable input for on a motor controller for?

I'm trying to figure out this motor controller I recently got and it has two pins called PWM / D2 and PWM / D1, disable inputs. I don't understand the description for them and don't know what they are ...
0
votes
3answers
141 views

Two voltage sources - selecting with digital signal

I'm trying to build a fan controller based on Arduino. It will be (at least I hope so) possible to either control with pure PWM or voltage regulator based on buck converter. Now what I'm trying to do ...
0
votes
1answer
996 views

Solar Charge Controller Function Details

I am planning to make this controller: I would like to understand the way the components work to switch from charging to dumping and vice versa at set points. Note that the 555 timer is not being ...
0
votes
1answer
95 views

isolation between lcd 20*4 lcd and tm4c123 [closed]

power suply required for my launchpad is 3.3 v and that required for lcd is 5 v. I want to isolate lcd and launchpad. What should I do? do i need to put optoisolator between each pin of lcd and ...
0
votes
1answer
70 views

Designing Or Customizing A HDD/SSD Logic Controller

I read this post which answered most of my questions, but was a bit disheartening. So, this one may need to be deleted. I have also done my other research looking through articles like this. Is it ...
-2
votes
1answer
100 views

Lead-lag process control

What is the locus of the following system, and for what value of \$\alpha\$ is the damping ratio 0.5?
-1
votes
2answers
50 views

finding a system behaviour [duplicate]

Why is step response so important? for finding properties of a system we use step response of a system why we don't use other basic signals such as impulse or ramp? thanks for your responses.
3
votes
2answers
606 views

Using a TFT display that has no controller

I have been using LCD screens (with the controllers) for my projects for a long time. Now I thought of learning how these screens actually work, the part before they go to the controllers. Well ...
1
vote
1answer
408 views

What is the difference between disturbance and noise for dynamic systems?

In most references from dynamic system theory, the following linear continuous dynamic system is considered. $$\frac{\text{d}x(t)}{\text{d}t}=Ax(t)+Bu(t)+Dd_{1}(t)\quad (1)$$ $$y(t)=Cx(t)+Ed_{2}(t) \...