Questions tagged [monitor]

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votes
1answer
36 views

Non-rechargeable Battery Gauge circuit / Coulomb counter

I'm trying to find a cheap implementation/circuit to monitor the remaining capacity of a non-rechargeable battery to be specific Lithium thionyl chloride LiSOCI2 batteries. I am aware of TI and Maxim'...
1
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1answer
32 views

Need help identifying capacitor values from monitor PCB

I am trying to replace the SMD electrolytic capacitors from an LG E2442 but I am getting confused in regards to determining the correct values. I am trying to determine three different cspacitors ...
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3answers
66 views

How to control LCD monitor with micro controller?

I would like to control my PC monitor. After disassembly I found the control buttons are implemented like this (just more data line and buttons) I would like to control it (with ESP2866) With the ...
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0answers
31 views

How do I disconnect this ribbon cable?

Please help. This is a ribbon cable inside of Benq Q22W6 monitor connecting main circuit to the panel.
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1answer
67 views

Can I change 1000 uF, 16 V for 1000 uF, 10 V?

Few days ago my main monitor did not turned on. I opened it and discovered three capacitors, of 1000 uF/16 V each, in bad shape. Since all stores here in my town are closed due the quarentine, I'm ...
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0answers
29 views

Asus Pg278q mainboard component

Hi I'm looking to repair the mainboard of my gaming monitor but I'm having a hard time finding the name of the burnt out components. I can't even find the schematic. Please help Asus pg278q monitor.
0
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1answer
63 views

LCD screen: can this problem be caused by the inverter?

I'm repairing a HP 530 laptop with bad screen image. The image does not flicker, the corruption pattern is static. If I connect an external monitor through the VGA port the image is fine, therefore I ...
0
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2answers
687 views

Routing power and HDMI signal into usb type-c for DIY computer monitor

I am starting a project to build a DIY monitor. I have a spare lcd panel (model # LP156WF6) taken out of a laptop. I plan on buying a controller board for it and building it into a homemade enclosure. ...
0
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1answer
39 views

Calculating Energy Consumption Using a Current Sensor and Voltage Sensor

I'm creating a PCBA that uses a hall-effect sensor to measure current and a transformer rectifier design to measure the mains voltage. The voltage is 110-240 V, ~60 Hz. I wrote a digital filter and ...
0
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2answers
61 views

HP 1740 monitor stay on 2-3 seconds, turn off and repeat

I have an HP 1740 monitor that, when I turn it on, just remains 2-3 seconds to display and turns off completely (even the pilot). It seems to me that the problem is not in the backlight. I opened the ...
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2answers
53 views

Old monitor’s internal power supply works only when heated from the outside…fixable?

I have this old LG Flatron w1934s that worked fine until it‘s power indicator led started flashing, and after a long while the monitor turned then on, if I heated the monitor’s back with something ...
0
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1answer
350 views

How do I configure the wires in the LVDS 30 pin cable?

I explain: I have a screen that I want to use as a monitor. I have purchased an LCD controller board and a LVDS cable I need someone to help me to rewire the LVDS cable. I have the input terminal pin ...
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2answers
378 views

Spoofing or hiding monitor serial number

A MAC address of a computer can be spoofed by an FPGA which can be programmed as a network controller. I can set a custom MAC address to it. I turn off the motherboard's network interface controller ...
0
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1answer
22 views

monitor tp4056 charge current on a scope

I assembled a li-on charger with the TP4056 module as I've repaired a few solar lights for friends and a lot of the times the batteries are just low. Recently I purchased an Oscilloscope to use with ...
1
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0answers
61 views

Noise generated by monitor from Word document

I was zooming in and out of Word documents of only text and noticed that a noise was produced. The noise increased in pitch as I zoomed out and decreased as I zoomed in. I tried changing the font ...
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0answers
25 views

How to find out which Linear Polarizer Film Angle is right for repair?

I recently bought a broken monitor on eBay. The seller partially tore off the polarizing film thinking it was a protector of sorts. Now I want to replace that film. How can I find out which angle (90°,...
0
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2answers
185 views

Trick monitor into receiving signal [duplicate]

I have the plan to convert a few old LED backlit monitors into false windows. While I theoretically could buy direct LED drivers to power these panels, I'd prefer to keep the existing circuitry, since ...
0
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1answer
221 views

How does Mains Isolation work with the ACS71020 IC?

In the datasheed for the ACS71020 IC, it shows the typical application of the device in which current is passed through the chip and voltage is measured on the opposite side. I do not understand how ...
2
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1answer
102 views

ESD Mats failing with constant monitoring system

Good afternoon, This is my first time posting here, and I apologize if I am doing anything incorrectly. I'm already a member on StackExchange so I thought I would stick to this website for this ...
0
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0answers
41 views

Splitting a power supply to two monitors

I'm working on a project that requires 2 (identical) LED monitors, each of which has a separate power supply that outputs 19V 1.3A. To save space, I would like to instead use a single power supply ...
0
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1answer
188 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
122 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
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1answer
19 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
67 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
62 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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1answer
82 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? ...
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2answers
69 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
57 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
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1answer
118 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
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1answer
109 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
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1answer
76 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
41 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
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1answer
540 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
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1answer
104 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
131 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
53 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
124 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
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2answers
199 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 ...
1
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1answer
2k 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
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2answers
125 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
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1answer
581 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
197 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
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1answer
142 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
90 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
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2answers
46 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
219 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
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1answer
2k 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
1k 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
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1answer
2k 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
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1answer
408 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 ...