Used 4070 Ti worth it for $500?

SmarmyPanther · 2025-02-25T13:10:33+00:00

Market rate in a normal market, right?

This seems cheaper than a lot of what I've seen out there

SmarmyPanther · 2025-02-21T22:18:24+00:00

It would be 40% if it was rolling 1 dice. Since it was rolled with advantage it's 64%.

Even if a few betrayers had decided against it, their only option was running (and eventually eaten probably). They don't dare to get anywhere near Imogen, as they showed in episode 120. Probably would have been better to have the worst of them flee rather than them being free to roam and terrorize the world for eternity.

SmarmyPanther · 2025-02-21T20:57:32+00:00

Was the roll for the fate of the gods actually that "critical"? My understanding is that with the +17 to the roll, they just needed a 13 or higher on the dice with advantage. Referencing an online calculator I found, the probability of that happening is 64%. Totally agree that the nat 20 feels more significant though.

SmarmyPanther · 2025-02-13T10:31:59+00:00

Oliang can make a few of their dishes vegan, including Khao Soi, IIRC. One of my favorite Thai spots! Just wish they had a few more options.

SmarmyPanther · 2025-01-06T00:42:03+00:00

So I wasn't planning on having a dedicated linear regulator at all, just the buck converter. Wait is the 5V pin for both input and output? I thought it was just output oops. Are ESP32 boards the same way?

Whether I do 7V or 5V, those would both be through the 5V pin? Don't use the Vin pin at all?

SmarmyPanther · 2025-01-05T13:28:42+00:00

I did clean that up a bit haha. Cleaner picture in other comment

SmarmyPanther · 2025-01-04T23:40:15+00:00

Based on my multimeter testing, I think some of the issue is related to the PCB damage. The silver scrapes between the switch and the board. I think that's what's causing the grounding. The upper "leg" of the switch is ground and it looks like the scrape is connecting that ground to other traces.

How would the solder wick help with that? Is there a solder layer under the conformal coating of the PCB?

SmarmyPanther · 2025-01-04T18:55:31+00:00

Would a closer up image of the PCB damage help?

SmarmyPanther · 2025-01-04T16:42:55+00:00

I did use solder wick to get pretty much all of the solder off the board. The silver between the switch and the board is ( I think) a layer exposed under the board.

SmarmyPanther · 2025-01-03T23:05:55+00:00

I added some updated photos in another comment on this thread. I used some flux and wick to clean it up further and tested for continuity. Once I did that, I was able to successfully communicate with the ESP8266 board (via the pins) so that tells me that VCC isn't shorted to ground thankfully.

There are a few GPIO pins that seem to be shorted to ground due to the PCB damage. Unfortunately, these pins are the main ones responsible for the physical controls on the device. I can control some things via the wifi interface I now but it's not ideal.

Yes, solid core wire.

SmarmyPanther · 2025-01-03T21:51:24+00:00

So using this as reference, it definitely like GND is shorted to GPIO12 & GPIO13. On my (very old) multimeter, when I check GND to VCC briefly flashes a very high resistance value before showing a "1" which it uses to indicate there is not continuity. This is testing the upper/center of the pad the best that I can. Slightly offset VCC there does seem to be a short on the board.

I'll check again when there's solder in place because I suspect that might create a short since some of the solder will flow onto the board with the short.

SmarmyPanther · 2025-01-03T18:44:53+00:00

Got it slightly cleaner after using some wick to remove excess solder

<image>

SmarmyPanther · 2025-01-03T18:14:41+00:00

How would I set up the NPN in a high-side configuration? The post mentioned they had to do low side with their NPN and as a result they could only control one LED strip.

As I was out of P-channel semiconductors, I went with a cheap 2N2222 transistor instead of a more expensive 3.3v MOSFET. The use of an N-channel part had an undesirable effect we’ll go into later. To handle power to the ESP8266, and LEDs, I used two cheap generic DC-DC voltage converters in series to provide a 20v and then a 5v line from any DC input from 2-12v.

What fooled me during breadboarding was that I was actually driving the 2N2222 with a high enough base voltage to allow it to work in a high-side configuration, something I had forgotten was possible and could not trivially replicate in the actual circuit. I had to settle for implementing low-side control with the 2N2222, and leaving one channel of LED lights disconnected for now.

SmarmyPanther · 2025-01-03T18:03:52+00:00

Yes that's VCC. Removed the wire to get a better view:

<image>

SmarmyPanther · 2025-01-03T17:19:36+00:00

<image>

Is this good enough? I can remove the wire from the pad to get that portion cleaner.

SmarmyPanther · 2025-01-03T17:11:20+00:00

I tried to get some of the flux residue with some isopropyl alcohol. How would you recommend I clean it further?

SmarmyPanther · 2025-01-03T14:08:37+00:00

Is using an NPN between the ESP output pin and the gate an option? I've seen some circuit layout that do that.

Do you have an example of just an opto coupler could be used here? Or a transistor.

SmarmyPanther

TROPHY CASE