Questions tagged [controller]

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Relay contact arcing

I use a relay with an 80 amp contact rating to start and run a 1 1/2 hp AC pump motor. The points arc badly and soon become unusable. Is there a way I can add capacitors to the points in this AC ...
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Solar charge controller

I have a question related to pwm charge controller .If I have 120W,22V PV pannel and i have to charge a 12.8V ,54Ah battery,which solar controller to use, pwm or MPPT?
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How do I configure the DDR controller in an FPGA?

I am a beginner with FPGAs and I am trying to run a 'Hello world' project on a Zynq Ultrascale+ SoC (my SoC is the ZU3EG). The ZU3EG is mounted on a development-board which contains the following ...
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Using a varying DC voltage signal to trigger an on/off signal?

This question is for automotive use. A system monitors a constant voltage of 3.3 to 5 V (this voltage is fixed but varies from vehicle to vehicle) to indicate an "okay" status, when there is ...
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Integral Compensator Realization from Transfer Function

I am trying to design a compensator based on the transfer function below Gc(s)=(1.017E6s+4.969E9)/(s^2+4.884E5s) The transfer function has a constant that is offsetting circuit gain, followed by a low ...
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PID controller question

I came across this PID controller that drives a motor, which I understand well. For my application, I need to drive a load in both direction (two electromagnets in series with poles opposed). The ...
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Brushed DC Motor Closed Loop Speed Control Under Load

I've designed a PI controller to control brushed DC motor speed between 0.6Hz - 6Hz (RPM:36 - 360). When I control the motor speed at 0.6Hz (approximately 4.0V supply and 60% PWM duty), it can rotate ...
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Is it possible to modify 8-pin Christmas tree LED controller's functions?

Intro I have an 8-function artificial Christmas tree. The 2-wire LEDs have eight different lighting settings. The control box of the tree has a pushbutton that I can depress to cycle through the ...
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DE-9 female to usb male conversion of gamepad for PC

I have an old game console which had Mario and contra old games . It has two controllers,they have db 9 female at there end but i want it to run it in my PC via USB. I want to know how i can convert ...
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Pre-charge resistor and contactor power dissipation calculation

I am building my e-motorcycle. I am planning to use only one contactor instead of using three contactors. In my plan, pre-charge resistor and contactor circuit will be main contactor too. I am curious ...
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Quick state feedback controller question

If two estimators where used in a state feedback system, one with error dynamics poles at -10 and -9 and another one at -80 and -90. Which system will give you a better overall performance?
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Identify a component in a picture of a motor controller

I have the picture below of an electronic component I want to identify and get the meaning of the code marked on it. There are two of them pointed with arrows. The code on the visible one is J1K. The ...
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Designing a controller (control systems)

I have to propose a controller C such that the entire closed loop system would be stable and the error approaches zero as time goes to infinite. I'll now explain in more detail. I need to find a ...
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Problem with TRIAC-TDA1085c circuit

I have a problem with a TDA1085c circuit. The board has 2 terminal switch with a moving shaft.There are 3 positions. Position 0 (motor stopped) position 1 (right-handed rotation) and position 3 (left-...
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1 vote
2 answers
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What are the limits of Peltier cells?

I am doing a project for the university. The project consists of a temperature controller in a glass chamber. The objective is a controllable temperature in a range of 0 - 100 degrees Celsius. The ...
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DIY Ebike BLDB motor controller, low torque, is it my motor?

I've designed a 3 phase inverter for driving a BLDC hub motor. The design (if anyone wants to look at schematics, is here). This works well, the motor spins up and down fine, no worries. However, if I ...
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3 answers
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What is "Reference" that leads to the controller block?

I am currently reading the textbook Fundamentals of Power Electronics, third edition, by Robert W. Maksimovic and Dragan Erickson. In the introduction, the authors say the following: Control is ...
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Throttling of Electronic Speed Controller with 6S lipo

Thanks for having look at this. I had an turnigy 150A ESC and 2000KV bldc motor. I calibrated ESC and it happened perfectly. I connected 3S lipo to ESC and increased the throttle from 1100uS to 2000uS....
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Need help figuring out 8 heater PID controller circuit

I am building heater controller system for 8 heaters using PIDs and contactors. Heaters are divided into 4 groups i.e. 4 pairs of heaters. Each group has its seperate thermocoupler, PID and contactor. ...
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Arduino/motor shield like controller for 24V DC motor

I have a bunch of small 6V DC motors that I'm running off of an Arduino board and its motor shield. I am able to control the speed via PWM pins and the direction via DIR pins. I wrote a code that ...
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12V to 5V regulator for PWM fan controller

I am planning on building a PWM fan controller using a 555 chip. I have found the following schematics for it: The fan I will be using is a Noctua NF-A14 Industrial 3000. From the data sheet, I see ...
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Confusion in proportional controller

I was revising proportional controller from here and got confused in following figure which is common in many books also. Since output of controller is proportional(by factor K) to error function but ...
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Methods to measure output variable in a feedback system

\$R(t)\$ is reference signal, \$U\$ is controlled input, \$Y\$ is output of the plant, Ts=1 s is sampling time (i.e. after each 1 sec output and reference is compared) and input output relation of the ...
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Combine two UART inputs to one averaged UART output?

My thought with this project was to combine two UART gps receivers to one board that would then average the GPS position and output a UART GPS signal. I have no idea if this is even possible. I've ...
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DRV8313 Brushless DC motor controller output voltage to motor is zero

I have installed two DRV8313PWP in a custom PCB and I have followed the schematic in the datasheet to control BLDC motors. After researching how to program them, i have concluded that pins EN1, EN2 ...
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Voltage Controller Pulse Delay

I want to make, as simples as possible, a circuit that I could control how much delay it can add to a pulse. My goal is to make a anti-wheeling system for motorcycle with cdi. It basically sends a ...
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How do I make a voltage switcher using transistors?

I have a 12V battery connected to an electromagnet. I need to be able to change the input voltage from 12V to 9V using a transistor. I was thinking of something that changes the voltage path to a more ...
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Converting an analog controller into a digital controller... Theory

I have created a stable PI s domain controller for my system. When I go to digitize it in PSIM by adding a ZOH and a delay block and by converting the PI controller into the z domain using backward ...
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Solar powered bilge pump [closed]

Thanks in advance for any assistance you provide. My system does everything correctly as expected, but its performance is abysmal. The lift of the pump is very poor, it manages about 50cm before ...
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2 answers
147 views

Are electrode based, water level monitoring systems safe?

I want to install a pump control with water level monitoring system. I've seen all kind of sensors, ultrasonic, infrared, mechanical (Based in pressure switch's / float valves), etc. One of the most ...
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How to attach wires on a keyboard controller PCB

I want to make a module with 3 momentary buttons that will be record the numbers of pushes on a pc. For this first i though about using an arduino but also I am trying to use a keyboard motherboard/ ...
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Stiffness in bldc position loop

I implemented a position loop using lead lag compensator on bldc motor drive. I am not getting stiffness at required position. Can anyone help with the issue. Max tolerance 0.01deg with the reference ...
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3 votes
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Custom USB Gamepad Working But Not Detected In-Game

I've created a custom HID gamepad using an STM32L151C8T6 (probably irrelevant) and my computer recognizes the device using the gamepad tester application built into Windows 10. I can verify the ...
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1 vote
1 answer
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PWM Fan Controller for heat exchanger with timed defrost cycle

I am building my own heat exchange ventilator and trying to figure out the best control board options. The first part is simple. I want to enter custom parameters for fan speed based on a temperature ...
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Does anyone know what this SMD IC labelled "HuANA" is? I'm having a hard time finding its datasheet on the internet

I am troubleshooting a Xiaomi M365 e-scooter. After checking for problems in the dashboard, I found the BLE controller's supply pin is grounded/shorted with the ground. I found this SMD IC "HuANA&...
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What are these pull-ups for on BLDC driver reference schematic?

I'm trying to design a simple BLDC motor controller using L6234 driver IC. Looking at its application reference schematic I came across some weird pull-ups (highlighted in green, I assume these ...
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I want to make a temperature controller, but the heating element didn't work

My schematic circuit from controller to heater (12V) When I connect the heater, the voltage drops to zero. When I try it in a simulator with a DC motor, it works: This is my 12V heating element:
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Can you help identify the controller of smps

Found on smps it is probebly the controller - but couldnt find it on google Looks like it is writen 9202 834p4
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What is a "discrete time controller"?

I'm reading a paper, and the first sentence is: Most dynamic systems are controlled by discrete time controllers What is a discrete time controller ? Thanks
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2 votes
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How can I make a 'PD' battery port pass 9v instead of standard 5v?

I wanted to get a standard lightweight phone charger to power my DIY portable device. I have tested it with 9v which works but I'm realizing that for those 'PD' chargers I'll need something on my ...
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Dc controller fuse keeps blowing

I am using a dc controller like this: https://www.amazon.com/SZMWKJ-Wireless-Controller-Positive-Inversion/dp/B07CG4Y3N9 to control a linear actuator. The controller has a 10A fuse, and the linear ...
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DIY LED controller

I am building a LED controller using an ESP 32 and IRLB8721 mosfets. I have 3 RGB LEDs hooked in series. The whole thing is powered by a 12V power supply which says it is set into outputing only 350mA ...
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Universal motor torque measurement

I would like to control AC universal motor (brushed). I would like to know the load torque, but I cannot measure the torque directly. I have to calculate it from motor parameters. Please let me know ...
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Is it ok to connect the output of a solar controller to a fused outlet on a fuse panel?

The fuse panel is breakered to a battery and is used to power other low amp equipment. The model is the 6 gang blue sea panel with blade type fuses. Since the fuse panel is just a couple pieces of ...
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1 vote
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Replacing an analog pot with a digi pot in a flying drone controller

I'm working on a project at the moment and I'm supposed to change the analog pot on the controller with a digi one. My question is does installing the digi pot changes anything in the controller ...
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Star Delta Starter control with Arduino

I don't have any experience with star delta starters but on doing some research I concluded that 2 push buttons(NO and NC) are required to turn on or off the system. I have a pump which is star delta ...
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Model reference adaptive controller

I have designed a model reference adaptive controller for which I have obtained the step response for different values of adaptation gain. I have attached the output graph obtained. Can anyone please ...
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1 answer
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Problem in selection of state variables of inverted pendulum

I was reading about controller design from the book Control System Design, An Introduction by Bernard Friedland. In one of the examples of controller design for an inverted pendulum, the author ...
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Controllability and observability from given transfer function

Is it possible to determine whether system is uncontrollable or unobservable or both from given transfer function in which there is pole zero cancellation? for ex.transfer function like this Or it ...
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What is significance of these variables in given block diagram of system

This figure is from book by Norman S. Nise and can anyone explain me following variables and their effect on the system 1.'r' , as far as I know it is reference and here author considered its value ...
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