Questions tagged [controller]
Tag is very generic and a bad choice. Please consider a more appropriate and directed tag.
92
questions
-1
votes
0answers
48 views
Stable PWM during Control Voltage Loss
I have a system as below, controller runs at 200 kHz. I have a requirement of interruption at the controller voltage PWM signal for 5 μs, still during that I need to have the PWM running. So I was ...
1
vote
0answers
23 views
RGBW 4 channel LED strips: Do I need externalpower supply or is the LED controller enough?
Not a beginner but still a novice :)
Main goal is to find out if the LED controllers I have chosen can drive my LED strips or if I need external power supply. And to understand ofcourse :)
...
0
votes
0answers
37 views
Are there cerifications needed to bring 5VDC LED Controller to the US market?
We are producing LED programmable controler, the power supply is 5VDC.
Do we need any certification (UL or similar) for the US market?
0
votes
0answers
20 views
Help for design simple heating circuit using Temperature controller MH1210W
I have to warm at 33-37 Celsius degree a small wood box , volume 600 x500 x800 mm
placed at 25 Celsius degree.
For maintain this interval 33-37 Celsius degree - I can use Temperature controller ...
-3
votes
2answers
105 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
vote
0answers
31 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
99 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 ...
0
votes
2answers
170 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
votes
0answers
117 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
54 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
vote
2answers
63 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
votes
0answers
107 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
votes
1answer
181 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
57 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 ...
2
votes
1answer
409 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
votes
0answers
302 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
236 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
vote
1answer
66 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
765 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
votes
0answers
111 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
votes
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
vote
1answer
291 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
708 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 ...
0
votes
5answers
492 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
473 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
140 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
236 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 ...
-1
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
vote
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
vote
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
votes
2answers
801 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
171 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
124 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
397 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
174 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
349 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
180 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
115 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
votes
1answer
119 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
202 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
984 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. ...
