u/Siberianhut — reddlx

Can anyone figure out what the issue is?

Im trying to test the first part of the ram module, however, whenever I turn on power it either instantly or slowly shuts off like in the video or a few LEDs randomly light up and any change to the data or address inputs don't do anything, and another thing is, the power supply module that Im using INSTANTLY heats up so much that I can literally smell the metal the second I turn it on, that also includes the 74LS189s slightly heating up too.

I tried other power supply modules I have, and on other circuits it all works fine so I can't tell if its a wiring mistake on the breadboard or a defective chip or I'm just missing something, I spent 2 hours trying to figure it out but still don't know...

Update: It seems that my 74LS189 chips are actually just defective. After some troubleshooting and testing the chips on separate breadboards, it seems that the A0 input is causing a short and rapid overheating ensues, I'm purchasing new ones and other ram chips so hopefully it works out fine later.

u/Siberianhut — 3 days ago

▲ 92 r/beneater

Do you really need resistors on the output LEDs?

Ive seen a lot of people confused or annoyed that ben doesn't use current limiting resistors in his build and it creates a lot of inconveniences for people following along which is true, I had to design a lot of my modules with this in mind, but he explains this in the ram module video that the ICs used, have built in resistors for the outputs therefore It isn't really necessary.

I tried this myself and my LEDs worked just fine even the small ones that instantly burn up and explode if there wasn't a resistor going through lit up and worked alright. Some people said it's still problematic because after a while it damaged the ICs themselves and Im just not sure of that claim. Can anyone give any better insight on this?

u/Siberianhut — 3 days ago

▲ 167 r/beneater

just started the 8 Bit computer build and finished the clock module, just several more to go.

after a whole day of wiring I finally got it. Third photo for first draft

also is there any suggestions on the bistable timer? the toggle switch seems to be problematic for me, I tried inverting the connections so many times, I think I got it to work somewhat but feels like its gonna inevitably fail..

u/Siberianhut — 13 days ago

▲ 22 r/FPGA

Are FPGAs just breadboards you can program?

Are FPGAs basically a software to hardware version of a breadboard? where, instead of placing individual logic gates or chips and circuits, and connecting them with wires to inputs and outputs, etc, you program them directly to be reconfigured on the board?

I'm sorry if this description sounds very wrong or reductive, but I just learned about FPGAs and got hooked, but still not sure how it really works so this analogy came to mind.

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u/Siberianhut — 19 days ago

▲ 6 r/UTMapp

Is it possible to emulate a 32 bit linux distro on an M chip Mac?

I tried using UTM with a debian iso file, but I just kept getting deadlocked at 'Display output not active'. I'm not sure if it's a mistake in the settings or if it's just straight up not possible to do so

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u/Siberianhut — 28 days ago

▲ 1 r/Sat

Is the Panda's SAT math book even worth it?

Pretty much what the title says, I wanna buy it to study more effectively and raise the bar on my skills for the August SAT, its 50$ on Amazon, including the 15$ customs fee, and I'm not really sure if it would even be of help?

For context, my base math scores are 700+. I'm mainly weak on analysis questions and multiple unknown constants type of questions. Does it cover those? Does it cover regression techinques etc? Could it really get you to 780+ consistently? After the ridiculous math module 2 on june i had to guess like 6 or so questions because I ran out of time. Would this be a good investment?

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u/Siberianhut — 2 months ago

▲ 1 r/Sat

dawg what is this...✌️(same day tests)

Scores literally make no sense. What am I missing?

u/Siberianhut — 3 months ago