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Questions tagged [monitor]

The tag has no usage guidance.

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0answers
40 views

Black lines on laptop appear even laptop is switched off? [closed]

This definitely doesn't make sense, but the persistent black horizontal lines on my laptop appear even when my laptop is switched off. The normal Color of laptop screen when switched off is a bit ...
0
votes
1answer
51 views

How to connect a 3 phase 240V machine on a 415V supply

I have a challenge in connecting a 240 V 3 phase 9kw machine to a three phase 415V supply in Uganda. The machine is from South Korea. The phase monitor trips. Below is the brief precaution ...
0
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2answers
76 views

Is there equalizer on the monitor's HD-SDI interface

Is there usually an equalizer on the monitor's HD-SDI input interface? In fact is it an requirement for HD-SDI monitors? Maybe HD-SDI signal is attenuated too much at the input of monitor, but ...
0
votes
1answer
16 views

Use different adapter for LG 25UM65-p [closed]

My LG monitor (25UM65-P) has original adapter (19V, 1.7Amp), can I use a different adapter (14V, 2.14Amp) for it? Has this any side effects or negative points?
1
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2answers
42 views

Connecting two wires to a DC 12v port on a controller board with 4 pads for a monitor

Sorry, the question was difficult to word. Basically I recently bought a controller board for a monitor and the DC cable I got wasn't correct. So until I get the right part, I just want to test the ...
1
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2answers
56 views

ADC conditioning for Lead-Acid monitoring? [duplicate]

I want to monitor a 12V lead-acid battery using an ADS1110 ADC. This ADC has a reference voltage of 2.048V. Thus, I (think) need to condition my input from, say a 10V-15V level range to 2 volts (0.4 ...
0
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0answers
58 views

Why is this transistor failing?

I have a Sharp LC-19SB24U Monitor that tends to blow a fuse on the power supply. Every time it does, the FET (FQP8N60C) has also gone bad. So I replace the FET (with thermal paste) and the blown ...
0
votes
1answer
39 views

How can I measure the charge current into a small LiPo battery?

I have a SparkFun USB LiPoly charger that by (default) is set at 500mA. If I try and measure the charge current with my DIY multimeters, the charging LED goes out and the meter reports zero current? ...
0
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2answers
65 views

Best way to monitor on/off state with a microcontroller

I have 3D printer with a cooling fan that by design is on constantly, however it only needs to be on when there is something to cool! I have no idea why they have it on all the time since it is loud ...
1
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0answers
38 views

How Backlit LCD Moniter Works, How it Looks Without a Backlight

I'm thinking about repurposing an lcd backlit monitor's front panel as an 'overlay' type panel over something else without a backlight. My understanding of the function of a backlit monitor that the ...
0
votes
1answer
92 views

Should I continue experimenting or not? [closed]

Good day to you all. I just accidentally stripped off the thin lining of metal that is found on the eDP cable of a Lenovo laptop (Lenovo IdeaPad 320-14IAP). The thing happened when I removed it from ...
0
votes
1answer
50 views

Reasonable Li-Po Battery Protection Circuit?

I'm designing a circuit to monitor the voltage of a Li-Po battery (single cell 3.7v, 2500mAh, 25A) and switch off the battery when the voltage drops to a certain threshold. The Circuit will also ...
0
votes
1answer
69 views

Monitor displaying negative colours [closed]

I found an LCD monitor on a rainy day and I had to completely disassemble it in order to remove all the water. When I dried everything and reassembled it, its colors were inverted! I wasn't really ...
0
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0answers
27 views

LiPo Monitor IC vs MCU

I am planning to build an electric bike powered by a 12S LiPo battery, and I am trying to decide how I should implement monitoring of the individual cell voltages. Manufacturers like TI provide a ...
0
votes
1answer
250 views

What lvds connector do I have

Can someone help me find out what type of LVDS cable I have and point me in the direction of an adaptor to HDMI. Thanks. Backstory: I recently had to throw out an old Sony Vaio All in one PC and ...
0
votes
1answer
95 views

Temperature sensing bee hive

I am a honey bee researcher and I want to build a temperature sensing system to monitor the temperature changes in the three dimensional space within the hive body using 5 sensors on each hive frame (...
1
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0answers
67 views

LED-Monitor-Firmware reverse engineering / disassembly => replace manufacturer startup logo

I have a display from a disassembled led-monitor (Wortmann Terra 2446W), that I want to use for a SmartMirror-project. Unfortunately, the monitor shows a big manufacturer logo when connected to power, ...
0
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0answers
44 views

Safe to use StepUp-Converter to power LED-Monitor?

I would like to use the following setup, since I already have the meanwell-powersupply. Can anybody tell me if this should be safe as long as I care for good cooling of the Step-Up-Converter, good and ...
0
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0answers
80 views

Li-pol battery voltage measurement

I want to measure Li-pol battery voltage with STM32 MCU. I power STM32 with 3V so I need a voltage divider for battery connection (Li-pol max voltage is 4.2V). Moreover, I'd like to add N-channel ...
0
votes
2answers
91 views

How sensitive are the DVI sync signals?

We're trying to output a full mono-colored screen signal in 640x480 resolution over DVI to a Samsung monitor from an FPGA board. The problem we have is that we don't get any picture showing, instead ...
0
votes
1answer
622 views

Can I replace a 33uF 100v Electrolytic Capacitor with a 47uF 400v Electrolytic Capacitor? [closed]

I'm -Extremely- new in the DIY Electrics. So go easy on me as I have 0 Electrical Engineering background. Handle me like a 5yo, haha. I recently decided to give self-repairing the old electronics I ...
0
votes
2answers
61 views

RS232 Bridge cable stopping after some time

Im trying to reverse engineer a very old DOS program that connects with a machine using RS232, for this i setup a typical in the middle connection like this: From Computer A to PC A connection im ...
5
votes
1answer
117 views

How do LCD screens repair themselves?

Hey, electronics people: A few months ago, I cleaned a spot on an LCD flat screen. Whatever it was, it was stuck on there pretty good and I guess I pushed down on it too hard (actually wasn't hard at ...
0
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2answers
72 views

What happens if I use a DC adapter with a15v output with a PC monitor with a 14v rating?

I have a PC monitor with a 14v rating but it's original DC adapter is broken. Can I safely use a similar DC adapter from a similar monitor, but with 15v output instead? How likely is the 14v monitor ...
0
votes
1answer
68 views

Do cold cathode fluorescent lights (CCFLs) degrade as a function of idle time?

I have a HP LP2475w display with a cold cathode fluorescent light (CCFL) backlight. It is approximately 8 years old. However, it has only 9041 backlight hours, meaning it has been used for only 12.9% ...
0
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2answers
74 views

What is the best way to design voltage monitor with tri-colour LED?

I've built a power supply with regulated +15v, +12v, +5v, -12v and -15v outputs and I'd like to build a voltage monitor to let me know if any of the rails are above or below their stated voltage. I ...
0
votes
2answers
44 views

current monitoring

In my camper I have standard 3 wire power coming in. 2 are 120vac and 1 neutral. Since the wires feed separate sides of the circuit breaker box with the neutral being common to both. Can I place 1 ...
0
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2answers
120 views

Remotely monitor condition of fuse

I am installing five 12V batteries in a motorhome. The batteries will be wired in parallel for a 12V system and will be contained across three different enclosures. Each positive cable link between ...
1
vote
1answer
592 views

A novice question about 60Hz vs 50Hz frequencies in monitors [closed]

In laptop and desktop PCs monitors have parameters such as 50Hz 60Hz ect. What is this frequency about? Is there a DC AC converter inside the computers?
-1
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1answer
757 views

Can I use an arduino as a LCD controller?

I saw this video where a person used a graphical LCD as a very rudimentary monitor for his computer using an Arduino... I was wondering whether it is possible to use an Arduino as a controller board ...
1
vote
1answer
1k views

Low power battery voltage monitor

I would like to measure the battery usage of my ESP32 device. As my device runs in deep sleep mode 99% of the time, it's important that the battery monitoring circuit does not add too much to the ...
0
votes
1answer
181 views

How to connect LCD backlight wires [closed]

I have bad caps in my LCD monitor. While taking it apart, I disconnected the LCD backlight wires to get to the power supply. I blame bad product design and my own stupidity for not checking how the ...
0
votes
1answer
147 views

What are these values on this capacitor?

As you can see from the images, this capacitor needs replacement, however I do not know what the top 2 values mean. It doesn't state it's capacitance either... I assume the first value is decijoule ...
1
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1answer
751 views

EGA display converting to VGA - screen's shaking

I've recently tried to make conversion from EGA (probably, couldn't get scope to verify) to VGA to replace an old factory CRT monitor to LCD. Screen displays fine but it appears to shake vertically ...
11
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2answers
3k views

Do LEDs require more power to function as they age?

I have a strange issue with the LED backlights of the LCD monitor i'm using. I have had it for about 5 years and up until this time have run it at only 10% brightness to reduce eye strain. However ...
0
votes
1answer
54 views

Deflection coil/yoke needed - any ideas on where can I get it? [closed]

One of our molding machines screens has stopped working well. We've found out that the deflection coil has been burnt at glueing area and few wires have disconnected. Maybe somebody here knows if ...
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2answers
471 views

How to figure out what DC power jack I need? [closed]

so my monitor's power jack has burned up and was wondering if there is anyway to identify what jack I need to replace it? On the PCB it says J101 but Google is not coming up with anything.
0
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1answer
362 views

Modifying VGA Controller For My Monitor

I saw this VGA demo for a 640x480 monitor http://pumpingstationone.org/2013/04/nerp-fpgaok/ and I would like to run it on my monitor using a Basys-3 FPGA. The GPIO demo code for the Basys-3 board ...
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1answer
75 views

Cost of early color monitor versus TV [closed]

Back in the seventies and eighties, an important design choice for a desktop computer was whether to use a television or a dedicated monitor for display. A monitor could give better resolution; on the ...
1
vote
2answers
776 views

What advantages do CRTs still have over more modern display technologies? [closed]

Are there any uses for Cathode Ray Tubes in modern world. TVs and Monitors were first, then Oscilloscopes, I am not sure about Radar but are there any applications which will only work with CRTs or ...
1
vote
2answers
4k views

Wiring a 3.5mm Audio out jack where Speakers were previously

I'm stumped on this one. My monitor has these cruddy un-amplified speakers that you can barely hear when there is any other sound in the room you are in. My solution was to wire an audio out jack to ...
-2
votes
3answers
137 views

Monitoring signals on a bus with LEDs

I'm looking for a way to visually monitor logic signals on a bus with use of LEDs of different colours. The conditions are: I want to be able to visually distinguish the following states: a) Logical ...
1
vote
1answer
293 views

Why do large PCB traces have solder points/islands/stripes on them?

This is from a power supply for an old PC monitor. I opened it up to see if I could fix it (likely bad caps) and saw this rectangle matrix. What's the purpose?
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3answers
715 views

How to measure 6S LIPO battery juice in percentage from Raspberry Pi?

I've got a Raspberry Pi and I want to use it to measure the percentage of charge which a 6S LIPO battery pack has left which I then send to a server over the internet. I assumed there would be easy ...
0
votes
1answer
179 views

Foam on bottom of monitor motherboard [closed]

I am currently trying to repair my LG 27MP35 monitor and came across these foam blocks on the bottom of the motherboard: At first I thought they were just something like spacers, but then it didn't ...
2
votes
1answer
296 views

How can I convert a VGA signal to work with an old CRT monitor

I'm wondering if it's possible to convert a VGA signal to use as an input to an old CRT monitor (which I believe is monochrome), and if so how I'd go about doing this? The monitor has a 6 pin DIN ...
1
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0answers
2k views

LCD driver board M.NT68676.2 issue: Screen compressed, fills only part of display

I am trying to build a portable Raspberry Pi/Retropie system with an LCD screen I got from my old laptop (the idea is to have a portable gaming console to be used in a car). To drive the screen, I am ...
0
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3answers
905 views

How to power 12V 1A device with two 6V lantern batteries (1209)? [duplicate]

I have 2 EverReady 6 volt batteries model number 1209. I also have a 12 volt 1 amp screen that I need to power. How can I power the screen with these batteries?
0
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1answer
604 views

hookup a scope to monitor serial i/o

First off, I searched for this question and while I found other similar questions, none had an answer for this. I've got a serial cable from a (Linux) PC supplying data to a PCB (AVR XMEGA). I'm ...
1
vote
1answer
39k views

LVDS 30 pin cable confusion [closed]

I'm trying to salvage a Samsung LTN154AT07 LCD from a laptop. I've ordered an MT6820-B rev.3 universal LVDS driver and a 5A step-down module (XL4005), and I think I have a decent grasp of how ...