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Questions tagged [controller]

Tag is very generic and a bad choice. Please consider a more appropriate and directed tag.

0
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0answers
17 views

Controller for RC Filter

My class was asked to implement in MATLAB, a controller for an RC filter configuration with output response: 4/(s+3) The controller should give an output response whose steady state is 1 to unit ...
-3
votes
2answers
104 views

Is it possible to connect a smartphone/tablet OLED screen directly as a PC monitor? [closed]

why? Why OLED? mainly because of best contrast by having no backlight annoying leakage. Why smartphone or tablet screen? because of size, resolution and price. usage requirements, previous tests, ...
1
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0answers
29 views

Can I connect 2 power supplies for 16 meters LED RGB strip?

I've bought 2 sets of 10 meter LED RGB strip (7.2w/m) for a room. Then I've cut them to around 8 meters each to get 16 meters. Everything seemed fine but one thing, because it's 2 separate controllers,...
1
vote
1answer
77 views

What do terms half-rate and quarter-rate mean for DRAM memory controllers?

DDR3 Memory controller are often presented as being half rate or quarter rate, but what does this mean? e.g if I have a DDR3 SDRAM that is x16, what does the half or quarter rate imply in that case ...
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2answers
128 views

DMX Control - 50W COB LED

I have a DIY project, with the aim of building an (LED-based) stage/theatre light from scratch. One of the challenges I've hit with this is getting DMX control to dim the LED. I spent some time ...
2
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0answers
94 views

How to connect the Peltier module to TEC W1209?

I am trying to control my Peltier module using the W1209 TEC. I set the P0 to H, so that it should provide voltage to my Peltier module until the temperature reaches the set temp. The LED turns on ...
1
vote
1answer
52 views

Designing an PCIe ethernet NIC with built in ethernet switch

I am trying to design a ethernet network card that will plug into a PCIe slot and have 2 etherenet ports visible to the user that are connected by a unmanaged layer 2 switch. My architecture ...
1
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2answers
61 views

Which components for flat waterproof buttons controller

I'm trying to build a waterproof controller to mount on a motorcycle, to interact with a Raspberry PI Zero. I'm looking for the best way to build something flat (it has to be mounted on the handlebar),...
2
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0answers
97 views

How to calculate a voltage/current controller bandwidth based on their gains Kp and Ki?

I am doing some experiments with voltage and current controllers, but sometimes my results are not matching what I expected. At the moment, to calculate the bandwidth of a controller, I am taking the ...
-2
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1answer
166 views

Where to place a diode - DC 12v motor controller [duplicate]

I'm building a controller for a DC motor. I'm using a 12V DC motor from windscreen wipers. Here is my circuit diagram and a video of the simulation I made. https://www.youtube.com/watch?v=...
1
vote
1answer
53 views

Is it necessary to use a specific switch controller for a flyback converter circuit?

For example, this DA2077 is labeled as design for use with the NCP1027 switching controller. I have some TNY290 switches I order a while back but did not use. I do not see any problem with using the ...
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0answers
133 views

Help needed, am I on the right track with this airsoft build?

I'm building a backpack feeding system for a custom airsoft gun. These are my requirements: 1) the gun is a high speed, high rate of fire build 2) the gun operates off an 11.1v lipo 3) the gun's ...
2
votes
1answer
382 views

Are there any pci-e controllers that take like a SPI signal, or USB and then lets me hookup a pci-e x1 card to it?

I am wondering if such a thing exists, as I could really use one to hookup to a SoC I am designing a board around, as it would allow me to take like a pci-e tv controller, pci-e ethernet card, pci-e ...
0
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0answers
283 views

What happens to inverter if running motor controller without load (motor)?

Consider running a 3 phase BLDC motor controller having 20KW inverter fed by 100V whence designed for high amperage. What happens if we turn it on and start gradually increasing duty cycle of the ...
1
vote
2answers
228 views

Problem testing a DC Motor Controller

I want to build a robotic arm for a project, but I got stuck while testing the motor driver on the breadboard. I have followed the instructions from this instructable: https://www.instructables.com/...
1
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1answer
65 views

Spliced LED Strips with Pre-Fab Controller [closed]

I need 2 meters of high density LED strip for a project, but high density strips are often only sold in 1 meter increments. I'm thinking of buying two strips -- of one meter each -- and soldering ...
3
votes
1answer
690 views

Simple CAN bus design, communication issues

I am trying to get some simple communication between two boards that I've designed with an ATmega328P microcontroller and MCP2515/MCP2551 combination. The design is as follows: I have both ends ...
0
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0answers
93 views

dc brushless motor shuts off automatically

I'm trying to see whether my electric bike's dc brushless motor controller (input 24 V) is repairable. The problem is that when I adjust the throttle to the highest power and release, the motor ...
0
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2answers
30 views

Transmitter max output when checking ohms in parallel

To make my question simple and easy to understand I am giving an example below. I have an RTD (platinum 100) which change resistance with increase in temperature, for checking that rtd is showing ...
1
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1answer
287 views

Silly serial adder design with control unit

I have designed a serial adder, with a small control unit which is supposed to synchronize all the ff states. I'm specifically interested in the state machine that does such stuff (you can see a block ...
-1
votes
1answer
177 views

4,2v 3,2w Solar panel [closed]

What is tje most efficient solution to power a 3,2w 4,2v solar panel? Addind a diode and using lifepo 4000mah battery? Or using a contoller and 4000mah lipo battery? In this case which contoller ...
1
vote
2answers
663 views

PCI Express powered fan controller

I would like to make a PWM fan controller that uses a 555 timer and be placed in a Gen 2 PCI Express x1 slot, while pulling the power from the slot as well. I'm not looking to send or receive any ...
-1
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0answers
404 views

Motor Controller Supply and Logic Supply Sharing Common Ground

I am working on an arduino powered project using DC motor linear actuators, and I have purchased a Cytron MDD10A dual channel motor controller to link my arduino controller to two actuators. The ...
0
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5answers
462 views

phase matching power supply circuit

I am trying to design an electrical generator that can supply power to my house but without cutting off the utility power supply. The idea is that I could put the generator in parallel with the ...
2
votes
4answers
3k views

Fixing electrical controller (with joystick) on Pride Quantum 600 power wheelchair [closed]

The momentary switch is bad on a Pride Quantum 600 power wheelchair. The picture is below. It turns on, but you have to hold the rubber button/switch in the correct spot with the right temperature ...
-3
votes
1answer
461 views

What is Cin and Cout in this design? [closed]

I am trying to build my first circuit which is a simple battery charger: I found the first components I need ( diode, fuse and regulator) but I don't understand what Cout and Cin are in this picture. ...
0
votes
1answer
67 views

Converting -48 VDC to +12 or +24 VDC 10 Amps or more

Good day, I would like the simplest way to reliably convert -48 VDC (Telcom DC Plant -42 through -56) to either +12 VDC or +24 VDC, the crux is I need at least 10 Amps. What I am trying to do is ...
0
votes
1answer
136 views

What does the FP2108T Ic do?

I have disassembled Parts of something (I think it was an old TV or RC controller). There I found an IC with this printed on top of it: "Futaba Japan FP2108T 9175K". I am not good enough that i can ...
0
votes
1answer
225 views

PCB components identification and reference designators?

This is a motor controller for evaporative air cooler. I'm new to electronics so I'm trying to understand this chip upside down. But I have a problem with these components. 1. Q2 , I think it's ...
-2
votes
3answers
3k views

How DRAM refresh cycles work?

Nano capacitors in RAM act as leak bucket and continuously lose charge. For this RAM has to be refreshed periodically in order to charge those nano-capacitors again. "During the refresh cycles memory ...
1
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0answers
56 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 ...
1
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4answers
1k 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
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2answers
780 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 ...
-5
votes
1answer
163 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
123 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 ...
1
vote
3answers
1k 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
114 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
392 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
173 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
2k 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
339 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 ...
-2
votes
1answer
2k 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
177 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
114 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% ...
3
votes
5answers
2k 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
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1answer
118 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
1k 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
1answer
198 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 ...
0
votes
1answer
961 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
1k 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 ...