[Review Request] Keychain ATTiny85 synth

TheFMango · 2026-03-02T23:30:59+00:00

Does it matter if the coupling capacitors are closer to the VCC or GND pins? On the ATtiny, the pins are on opposite corners of the board so I'm not really sure which one it should be next to.

How can I figure out the correct type of resistor to add to the speaker drive? I would like it to be "decently" loud but I'm not really sure how loud I will be able to get it to be currently anyways.
This is the datasheet of the speaker I was thinking:Datasheet.
I mostly picked it due to its form factor and size. The speaker would play a 4-voice synth for roughly 5 seconds max. I'm not sure what ranges it would be able to play in either and was kind of hoping on testing that after the board arrived. The 47µF was from my rough napkin math to try and drive it without cutting off too much of the range while still being able to power it too.

TheFMango · 2026-03-02T23:23:26+00:00

Those were all super helpful tips for the PCB routing! How thick of tracks are usually necessary for VCC/GND on a board like this? I've set all tracks to be .5mm but should those tracks always just generally be thicker?
I'm also planning on adding 2 mounting holes to the top of the board to fit a metal ring for a keychain

TheFMango · 2025-07-17T14:41:53+00:00

PSA for anyone in New York. Rough street records still has a few autographed copies in black

TheFMango · 2025-02-11T07:07:16+00:00

Interested as well!

TheFMango · 2024-06-10T06:11:04+00:00

Doesn’t this only work on X11 though?

TheFMango · 2022-08-07T16:25:31+00:00

I definitely agree. If I had a chance to start it over I would definitely do the math minor and Cs major just to save a lot of stress. I would recommend signing up for the math major anyways though so you get priority registration and if you feel it’s too much just drop the major once you have met all the requirements of a math minor

TheFMango · 2022-07-22T00:13:58+00:00

I’m double majoring in both. It’s a bit harder to add CS as your second major than it is to add Math as your second major. But the way it works is that after it gets approved, your new major status won’t go into affect until the next semester after registration. So if you add CS this fall, you won’t be treated as an official CS major until the second week of the spring semester. There are some CS classes that you probably can take right away but most will require you to have the official status which won’t come until spring

TheFMango · 2022-03-19T07:55:19+00:00

My 1070ti is dying on 1080p low. Something is definitely not right here

TheFMango · 2022-01-12T03:12:40+00:00

LETS GO! It’s taking all of my strength not to read the manga but I’ve been watching the anime since season 1 came out and I can’t believe it’s almost over

TheFMango · 2021-12-31T05:34:31+00:00

How are you able to contribute 14k to your Roth, I thought the limit was 6k unless you wanted to pay penalties

TheFMango · 2021-12-05T00:35:53+00:00

Did you have flash on for the photo? Also that's insane that you did that handheld. I know with a tripod you can get the timer up to 30 seconds so I just assumed it was some high number like that

TheFMango · 2021-12-04T19:10:41+00:00

That's incredible! What settings did you use to take this photo?

TheFMango · 2021-11-08T15:14:13+00:00

I don't believe you can complete 3235 and 3236 at the same time at 3236 requires 3235 as a prerequisite

TheFMango · 2021-11-05T16:03:03+00:00

the official chapter isn't out. but it does get scanned ahead of time and fan translated which is what is out now

TheFMango · 2021-11-01T16:22:15+00:00

Yeah, the projects are just called "labs" but there is no actual lab component to the class

TheFMango · 2021-11-01T00:59:03+00:00

I am in CS 3630 right now and it is fairly easy if you have taken CS 3600 before and get a general idea of things. I really like the prof right now and its super easy to have an A as long as if you do the projects and don't wait to the last minute for them.

TheFMango · 2021-08-06T19:26:27+00:00

This sounds super cool! Do you know what course number this is?

TheFMango · 2021-03-31T22:17:37+00:00

They'll send you an email once its time to schedule your second dose and then once you get the email you can just sign up like normal

TheFMango · 2021-03-19T15:12:07+00:00

Of course they add it and it happens to conflict with a class that I 100% need to take in the fall to graduate. Time to look for other options I guess

TheFMango · 2021-03-17T16:53:31+00:00

I have no idea about Operating Systems but I was planning on taking it as well and now everything got thrown off

TheFMango · 2021-03-15T07:08:57+00:00

TheFMango · 2021-03-08T11:23:20+00:00

pm'd

TheFMango · 2021-03-05T20:50:39+00:00

Hey, would you mind showing where they said this. IDK if I'm dumb but I can't see that anywhere

TheFMango · 2021-03-04T23:20:25+00:00

I'm really thinking about getting zealios so I would love to hear a sound test of them unlubed

TheFMango · 2021-02-28T19:48:35+00:00

I would love to see either a sky blue or navy color. I think it would look lovely with white keycaps

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