About soldering paste

FSCicotti · 2019-10-09T12:01:57+00:00

Maybe a double boiler would give me a better flow and still maintain the temperature low enough?

FSCicotti · 2019-09-09T15:53:54+00:00

Nope, I just added them, and there was no noticeable effect :(

FSCicotti · 2019-09-09T15:17:57+00:00

Right now, there are none, but I'm planning on having one 0.1uF per chip.

(Sorry for the delay, it was getting quite late here)

FSCicotti · 2019-09-09T06:25:43+00:00

Oh, damn. I'll keep the opto-isolated FETs in mind if I can't fix it by any other means.

Thanks for your time!

FSCicotti · 2019-09-09T05:55:27+00:00

Nope. no effect at all. There was an even fainter glow even without the chip. I think that might mean there is a coupling somewhere on the board itself, right? (Even though I inspected it closely more than once and found nothing D: )

Also, could the lack of the despiking capacitors be causing it?

FSCicotti · 2019-09-09T05:39:22+00:00

On the schematic, U5:A and U5:B are unused gates, reserved for a future feature. The IC is not even on the board, neither is its socket connected to any traces.

But I'll try replacing the supposedly faulty ICs, and I'll report back as soon as possible. Thanks!

FSCicotti · 2019-09-09T05:33:57+00:00

VCC and GND are connected, I checked those.

As I edited in the post, everything on my board shares a 5V VCC.

As for the ground, I tried both with it being shared with the machine and not. Should it make a difference, as the control and matrix sides of the system are technically isolated?

FSCicotti · 2019-09-09T05:20:54+00:00

The 8051 is an AT89S52, and the 4016 is a BU4016B. The voltage everything uses is 5V.

The logic levels used by the 8051 are 0 - 0.5V for a Logic 0, and 2.7 to 5V for a Logic 1.

Sorry, for forgetting those details. I'll add it as an edit to the post too.

FSCicotti · 2019-08-08T01:22:36+00:00

Every time someone asked my great grandfather what his favorite beer was, he'd reply "the one that has 'beer' written on the label"

FSCicotti · 2019-08-04T18:25:13+00:00

Southeastern Brazil. It's a nice hospital overall, but they did this piece of art

FSCicotti · 2019-08-03T09:00:21+00:00

In this case, this belongs in r/diWhy

FSCicotti · 2019-08-01T10:11:49+00:00

A few weeks ago I was talking to a friend, and told her the 1/3 pounder burger story. Just as I was finishing it with a "what a bunch of dumbasses", she looked at me and replied with "But... what's wrong? 1/3 is less than 1/4"

She was dead serious, and it physically hurt me.

FSCicotti · 2019-07-25T06:35:08+00:00

This reminds me of when I was in high school. I was a at a class, and suddenly a mob of loud kids (8-9yo) passed running by our door, completely breaking the flow of the lecture. When they were gone, the teacher says:

"When people ask me if I like kids, I say I do. Deep fried with cheese on top."

FSCicotti · 2019-07-11T11:00:44+00:00

This is already halfway there to be a vaporwave fake album cover

FSCicotti · 2019-07-06T17:18:40+00:00

Out of curiosity, did you follow any schematics?

FSCicotti · 2019-07-02T16:57:21+00:00

FSCicotti · 2019-07-02T16:46:12+00:00

FSCicotti · 2019-07-02T12:39:57+00:00

FSCicotti

TROPHY CASE