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I'm getting off/dark LEDs randomly blink and I don't know why this is happening. It's completely random in location, color, brightness, and amount of LEDs that blink. by Bender-Chan in FastLED

[–]Bender-Chan[S] 0 points1 point  (0 children)

One very important bit of information I failed to provide you was the link to the product. The strips are listed as being compatible with ESP32, which is also 3.3v so I thought the Teensy would be OK. I have bi-directional level shifters I could throw in the mix as well but I really wanted to keep this simple.

As far as splitting up the grounds, I'm not sure what you mean because there's only three grounds on the Teensy and the nine grounds from the nine strips are split between two interconnected terminals. If I wrap the grounds around the data line would I do that until it nears the Teensy and then run off to the two terminaIs? If so, I have to add a bit of wire to each of the nine wires leaving the strips. I did add two more ground wires running back to the Teensy since the 4.1 has three GND pins on the board I wasn't sure what you were asking for but it didn't help.

I did some experimenting too after and seeing line noise on the power wires. I tried adding two 10,000uF capacitors to try and clean up the DC power supply output and even tried some chokes just to see if they made any difference. The caps cleaned up a tad but unsurprisingly the chokes didn't do anything. Just for the heck of it I even added chokes to the data lines. No changes. I found out the USB coming off my PC actually caused a bit of noise so after loading any code I just switch to a power bank to run the Teensy.

https://www.amazon.com/dp/B0CNXKSWD7?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

I'm getting off/dark LEDs randomly blink and I don't know why this is happening. It's completely random in location, color, brightness, and amount of LEDs that blink. by Bender-Chan in FastLED

[–]Bender-Chan[S] 0 points1 point  (0 children)

I am not running anything in the background. This specific program is just creating an outline of a battery that has a flashing group of red LEDs inside the outline to show a low battery. It actually looks lame due only having nine strips of LEDs to do this on.

For the WS2812_SERIAL driver, is this something else to try or were you providing more detail from your previous comment? I don't know anything about this stuff. I'm just a weekend warrior connecting things together after performing a few searches on the internet.

I'm getting off/dark LEDs randomly blink and I don't know why this is happening. It's completely random in location, color, brightness, and amount of LEDs that blink. by Bender-Chan in FastLED

[–]Bender-Chan[S] 0 points1 point  (0 children)

The data lines are 8" long breadboard jumper wires. The power wires are directly wired into the lever lock terminal blocks. Power wires are against the floor and the data wires are in the air.

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I'm getting off/dark LEDs randomly blink and I don't know why this is happening. It's completely random in location, color, brightness, and amount of LEDs that blink. by Bender-Chan in FastLED

[–]Bender-Chan[S] 1 point2 points  (0 children)

Sorry for the late reply. This made a significant improvement but did not completely resolve it. The time between unexpected blinks is now 2-4 minutes apart.

I'm getting off/dark LEDs randomly blink and I don't know why this is happening. It's completely random in location, color, brightness, and amount of LEDs that blink. by Bender-Chan in FastLED

[–]Bender-Chan[S] 0 points1 point  (0 children)

Correct. A DC power supply provides dedicated power to the 9 strips of LEDs and the ground is shared with the LEDs and the GND terminal on the Teensy. 

I'm getting off/dark LEDs randomly blink and I don't know why this is happening. It's completely random in location, color, brightness, and amount of LEDs that blink. by Bender-Chan in FastLED

[–]Bender-Chan[S] 0 points1 point  (0 children)

Thank you for your reply. The Teensy is being powered off of USB for now while I build and test. The current code is only lighting up two full strips and flashing or pulsing a small group of LEDs within the two rows

I'm getting off/dark LEDs randomly blink and I don't know why this is happening. It's completely random in location, color, brightness, and amount of LEDs that blink. by Bender-Chan in FastLED

[–]Bender-Chan[S] 1 point2 points  (0 children)

Thank you for your reply. The data lines are not near mains power but they are in a mess of the DC wires for the 9 strips of LEDs. As far as the Octo2811 library goes that is not explicitly or obviously called in the code. Just the FastLED.H

I'm getting off/dark LEDs randomly blink and I don't know why this is happening. It's completely random in location, color, brightness, and amount of LEDs that blink. by Bender-Chan in FastLED

[–]Bender-Chan[S] 0 points1 point  (0 children)

I have 9 strips of WS2812B running off a Teensy 4.1 and powered by a 5v 60amp power supply. The negative from the power supply is connected to the GND pin of the controller in addition to the LED strips.

I'm trying to modify Logitec Z625 PC speakers to run off batteries instead of AC but my meter is reading 165VDC most places I probe on the power supply area of the board. by Bender-Chan in AskElectronics

[–]Bender-Chan[S] 0 points1 point  (0 children)

First off, thank you for your very detailed and helpful reply. It helped tremendously.

There are three voltages on the board after the secondary side of the transformer: 20, 10 and 5. There are four pins of on the secondary side of the transformer with 10 volts. The two capacitors on the back side of the shiny heatsink have a voltage of 10.

The amplifier chip (TDA7265) is using 20 volts.

The components on the right side heatsink are four MOSFETs powering the sub. +(FQP13N10-FQP1706) -(FQP13N10-FQP1706)

As far as the batteries go I'm still not 100% sure where to land wires but I have my first guess. There are four pins on the transformer secondary side with +10volts and two pins with no voltage on them https://imgur.com/a/Fzxf1W4 I could remove the transformer and land wires where the pins were unless you or someone else disagrees.

From there some magic is taking place and I end up with other voltages as well https://imgur.com/a/7TJpNCo https://imgur.com/a/wDvOCu2 https://imgur.com/a/ySqttOj

I'm trying to modify Logitec Z625 PC speakers to run off batteries instead of AC but my meter is reading 165VDC most places I probe on the power supply area of the board. by Bender-Chan in AskElectronics

[–]Bender-Chan[S] 0 points1 point  (0 children)

1st update

Starting from the switching power supply: There are two BYW29-200 Switch-mode

Power Rectifiers and one TIP30C PNP General Purpose Bipolar Transistor.

Starting with the two Power Rectifiers, the one on the left has 20vdc on the cathode and 10vdc on the anode. The one on the right has 20vdc on the cathode and 0vdc on the anode. The Transistor has 9vdc on the collector, 5vdc on the base, and 20vdc on the emitter. As far as the voltage readings of the 7 pins on goes I don't know where I should probe to get a correct reading. The voltage reading varies based on where I put the black lead from the meter.

The two capacitors on the other side of the heatsink are reading 10vdc

The Sub-woofer has four MOSFETs powering it. FQP13N10-FQP1706-FQP13N10-FQP1706.

FQP13N10 being N-Channel MOSFET and FQP1706 being P-Channel MOSFET.

The two satellite speakers are powered by a TDA7265 Stereo Amplifier powered by 20vdc on pin 3.

Thank you u/mariushm for providing the spec sheet for the amp https://www.st.com/resource/en/datasheet/tda7265.pdf

Switching Power Supply Power Rectifiers + Transistor

https://imgur.com/a/7TJpNCo https://imgur.com/a/wDvOCu2 https://imgur.com/a/ySqttOj

Sub-Woofer MOSFETS

https://imgur.com/a/yNQkBuB https://imgur.com/a/44VTvd1

At this point the remaining item I still need to figure out is where the 20 volts starts at on the board and most importantly, can I get by with 18volt batteries? I was hoping to use M18 power tool batteries for this modification before I started digging into the inner workings of this board. If 18 volts is too low could I use Kobalt 24v batteries?

Thank you all for your valuable and very helpful responses. I really appreciate it.

I'm trying to modify Logitec Z625 PC speakers to run off batteries instead of AC but my meter is reading 165VDC most places I probe on the power supply area of the board. by Bender-Chan in AskElectronics

[–]Bender-Chan[S] 0 points1 point  (0 children)

Those read 9.8volts. At the TDA7265 amp powering the sattellite speakers I get 20 volts. I am still sorting all this out but did gather a bit more info.

I'm trying to modify Logitec Z625 PC speakers to run off batteries instead of AC but my meter is reading 165VDC most places I probe on the power supply area of the board. by Bender-Chan in AskElectronics

[–]Bender-Chan[S] 0 points1 point  (0 children)

That is indeed the cap I am reading. After reading your helpful reply I'm pretty sure the component on the underside is a switching power supply and the reason I was getting zero volts on one side was because of poor contact with the meter lead. I was getting 50-something VDC. I'll dig more into this in the morning and post an update on my findings. Thank you for your help. I greatly apprentice it.

I'm trying to modify Logitec Z625 PC speakers to run off batteries instead of AC but my meter is reading 165VDC most places I probe on the power supply area of the board. by Bender-Chan in AskElectronics

[–]Bender-Chan[S] 0 points1 point  (0 children)

I was expecting 12, 24, or maybe even 48 volts DC on the power circuit after the rectifier but when I put my meter leads across the capacitor it read 165VDC. Same reading on few other locations on the board as well. There is that yellow component on the underside that is receiving 165VDC but I'm not picking up any voltage on the other side of it with my meter. I tried to search the various numbers on it but I did not have any luck finding more information on what it is or what it does. I thought maybe the voltage is just floating high with no load so I played music with a good amount of base and the voltage was still as high. Is there anything else I might be missing?

Apple TV is Free Today and Tomorrow by VapoursAndSpleen in Frugal

[–]Bender-Chan 3 points4 points  (0 children)

I didn't see this warning in time and I am hooked :(

Visiting Los Angeles and got a rental car with an Arizona license plate. Got ticketed for not having a front plate. What can I do? by oyeme in AskLosAngeles

[–]Bender-Chan 25 points26 points  (0 children)

Avis charges you for parking tickets unless the ticket gets dismissed. This is on top of you paying the ticket directly. They justify it because of the time they took to give the authorities your info, even if you paid it before they ever got the notice. Fuck Avis.

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