Questions tagged [controller]

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46 views

Wireless RGB led controller circuit with motion sensing - design feedback

Beginner hobbyist here. I would appreciate some design feedback. Purpose of this circuit: It controls an RGB LED strip (5 Meters, SMD 5050) via an IR remote and also automatically powers on/off the ...
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30 views

USB 2.0 Signal Integrity Using HSETT

I am trying to test USB 2.0 Signal integrity (Eye Diagram). For doing that, USB IF Forum lets you download the EHCI HSETT Software from their website. However, I am not able to use it due to one ...
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1answer
39 views

RS-550 DC motor controller 24V (35-70) A working range and a stall of 120A

I am currently designing a motor controller for a SUMO robotics challenge. Each of a two motor setup exhibits a (0.15-0.40) N.m torque resulting them pulling (35-70) Amps nominally and a peak of 120 ...
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33 views

LED room lighting 15m

I want to decorate the ceiling of my room with LED strips. This would be a total of 15 meters (3 * 5 meters) of LED strips, The led stripes have 60 leds per meter IP30. my plan was that I could ...
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1answer
69 views

What is this IC “30=70H”?

I'm hoping to identify the IC on this Philips Hue lightstrip controller in order to replace it. The IC blew after a barrel connector head used had it's polarity reversed, so 24V went in the wrong way ...
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0answers
55 views

Using Solar Charge Controller with AC Power instead of Panels

I'm working on a project here which needs to have a small SLA backup battery. I have a cheap PWM solar charge controller already and I want to use plugged into an AC power supply (48V DC out) in ...
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1answer
34 views

Low voltage switch (12v)

I am looking to build a circuit that will control a 120v battery charger through a relay, the circuit should turn the relay on when the battery goes below 11 volts and turn off the relay when it gos ...
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1answer
29 views

Power Factor Correction Controller IC limits

I've been considering throwing in an active PFC circuit into a high power PSU (about 5kW max surge at 240Vrms, 1400W typical), and while looking for an easy to use, low passive count controller, I ...
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1answer
33 views

Difficulty stabilizing a system using sisotool on Matlab

I am trying to design a controller for a synchronous buck converter by using the siso tool on Matlab. The inductance value is 1.28mH, the filter capacitance is at 4.8uF and the load is a 240Ohm ...
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1answer
44 views

Lag compensator vs pi controller?

Although Lag compensator and pi controller have apparently samd function of improving steady state response But how can we decide?which one to use?
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0answers
15 views

Lead compensator vs pd controller?

I have already studied that lead compensator is apparently similar to pd controller for both improve transient response But how can we decide?which one to use?
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1answer
48 views

Equivalent compensator of pid controller?

As we know that pi controller is equivalent to lag compensator and pd controller is equivalent to lead compensator, so what will be equivalent of lead-lag compensator?
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0answers
34 views

lithium ion charge controller with data pins

I have a Samsung powerbot vr9000 vaccumme cleaner. It stopped working one day and I found that the battery terminals do not have any voltage. I opened it and doubled the battery count with the same ...
0
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1answer
110 views

How can I get/build a current controller/amplifier?

Background: I have a Lorenz-actuator (coil+magnet) that I need to control precisely using a computer. The computer signal is output from a dSpace microLab box as an analog ±10V signal. This signal ...
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2answers
46 views

SMPS controller duty cycle resolution

when reading the datasheet for some SMPS controllers like the lm25116, I can see that they operates around 1MHz, but nowhere we can find their duty cycle resolution: 8bits, 12bits, 16bits ? So I'm ...
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1answer
53 views

Powering ETH Controllers

I began working with Ethernet controllers and there is a recurring theme that keeps confusing me. Currently I am incorporating the KSZ9031RNX into my design. The data sheet calls for digital and ...
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2answers
75 views

Looking for a button-controlled on/off PMIC akin to those in laptops [closed]

I'm designing a circuit for a custom event console (SMPS', chip reader, screen, controllers, NFC,..) which I would like to power on/off in the same way a laptop or tablet is powered on/off (hold ...
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1answer
119 views

Does the drive strength of a GPIO pin alter with change in temperature?

In low temperatures the functionality of the I2C is being affected, but the slave is working properly and the temperature is also within limit of slave. For that reason I suspect the drive strength. ...
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0answers
61 views

How to calculate the rotation of stepper motor for winding a thread on a reel

A machine which can be used to wind the thread of exact length on a reel using two stepper motors, one for rotating the reel(Ymotor) and other one is used for traverse back and forward(Zmotor). So ...
0
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1answer
73 views

high current UPS ish design

This is my latest attempt to try building a ups ish system for my 3D printer the printer is custom-designed with 5 meters (no, it's not a typo) on each axis. we use MKS Gen v1.1 with custom marlin ...
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0answers
27 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 :) ...
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0answers
37 views

Are there cerifications needed to bring 5VDC LED Controller to the US market? [duplicate]

We are producing LED programmable controler, the power supply is 5VDC. Do we need any certification (UL or similar) for the US market?
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0answers
30 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 ...
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2answers
125 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, ...
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0answers
33 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
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1answer
201 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
345 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
218 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
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1answer
99 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
78 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
156 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 ...
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1answer
275 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
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1answer
65 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
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1answer
478 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 ...
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0answers
400 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
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2answers
289 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
78 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
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1answer
1k 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 ...
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0answers
152 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
32 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
310 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
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1answer
179 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
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2answers
881 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
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5answers
545 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
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4answers
4k 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
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1answer
627 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
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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
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1answer
186 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
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1answer
316 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 ...
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3answers
4k 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 ...