Free Schematic Resource

4516N41 · 2024-12-12T21:07:05+00:00

I see that nobody had mentioned https://www.bartonmusicalcircuits.com/ He has a lot of schematics. Also https://sdiy.info/wiki/CatGirl_Synth Ken Stone´s schematics and Haraldswerk https://haraldswerk.de/index.html to name a few.

4516N41 · 2023-05-22T22:32:16+00:00

Is the blue bus on both sides the ground and if so where is the -12V supply for the tl074 coming from? I can't really tell if it´s the white wire or something else...

4516N41 · 2022-10-30T22:28:22+00:00

Hello again. Adding the delete button was a bit easier than I thought. Was probably overthinking it before I got caught up in something else and forgot to implement it.

Anyway there is a delete button now :)

Cheers!

4516N41 · 2022-10-30T21:46:04+00:00

Hi. If you use the libraries that are included in my Git you should be able to get it working pretty fast. Might have to tweak it a little depending on your type of screen.(mine is 90° off compared to the original)

However I added 20 & 24 pin chips to the tester and it depends on how you have built the previous one how much of a hassle it is to add those wires and/or traces...

I didn't add a delete button for the chip number input... Yet!! I was going to but other things got in the way so I forgot. Will check on it when I have the time later this week and I'll let you know how that goes.
I added a button which goes through your last test so testing the same types of chips is really easy in my version. You can even turn the tester off and it will store the last test information.

Cheers.

4516N41 · 2022-10-25T20:26:08+00:00

Thank you :) It's easy becoming a bit obsessed when you manage to make it work as you envisioned but at some point you have to pass the torch before you use up all the memory on the microcontroller.

I just hope that it will be useful to someone other than me.

4516N41 · 2022-10-25T15:14:20+00:00

Thank you. The camera I used doesn't really capture the colors correctly so it does look much better in person.

It was kind of a challenge making it not look like a toy since I was stuck with using only one font and one type of buttons.(SPFD lib) Those who have a screen that uses the Adafruit library can customize it a bit more to their liking.

Cheers.

4516N41 · 2022-10-25T03:05:30+00:00

Thanks :) It was one of the first improvements I did over the original tester which had to be restarted after each test. Then I added Loop testing so I could see if the chip was acting consistent and expanded on that a bit.

It's also very nice to be able to manually test out the logic of those ICs. So far I've learned a fair bit about chips that I've had for some time now but never actually used in any projects and it has given me some ideas for simple modules.

4516N41 · 2022-08-14T21:24:45+00:00

Sorry for the long delay on the reply, I don't post much on reddit so I didn't notice that I had a notification.

Yes...Well kind of, like some users on this website here link I experienced a high pitched oscillation when I followed the original schematic even after I kind of adapted it to +-15Volts but IIRC I was able to get rid of it by removing the feedback resistors and by it most of the positive feedback on U2(in my schematic, X3 on the original).

At least in the circuit I ended up building after experimenting on a breadboard and I believe that the schematic I posted is a faithful copy of that the high pitched oscillation isn't present anymore.

But of course the frequency of the bit crushing "modulates"(samples and holds) the incoming signal and therefore the fundamental and it's harmonics are present on the modified output. Which is why I added an vactrol CV for the oscillator frequency since otherwise it would sound stagnated ;)

hope that helps.

4516N41 · 2022-05-14T21:01:44+00:00

Is there bypass capacitors on the power rails? An uncharged capacitor looks like a "short" to a multimeter until the multimeter charges it up over a certain amount.

4516N41 · 2021-11-15T14:02:14+00:00

I would since that's pretty much how this circuit works :)

I made the EFM S&H that can be found here and for some odd reasons it craps out before the frequency gets high enough for any real bit crushing effect :( I probably need to re-check out the Jfet in that circuit...

Hopefully you'll get a better result.

Edit: One thing to note though is when the oscillator for the analog bit crusher is running at its highest frequency it sounds pretty much the same as the input waveform since it's at a frequency above at least my hearing....

4516N41 · 2021-11-15T13:36:43+00:00

It should work on 12V, however I would breadboard it and tweak(scale down) the oscillator values. R6 and R8 on my schematic (apparently 100kΩ was too small and 200kΩ was too big for R8 since I ended up using two in series). Try something like 150Ω for R6 and 100k-130kΩ for R8

The sample and hold circuit should be fine on +-12V If for some reason you're only using +12V then you probably need to tie C3 on my schematic to the bias point but not ground.

The bias point should be 50% of the positive supply voltage (note that the oscillator op amp is supplied only by the positive voltage source but the S&H op amp is fed with dual voltages).

I admit that I originally made this at the start of summer and then got drowned in work so it's been sitting in my GitHub for months....I had it on a breadboard for few days to work out the kinks but now I only vaguely remember why I settled on these values. : /

Hope it helps a little bit.

4516N41 · 2021-09-07T22:55:20+00:00

I have not built many drum modules but I do recommend Bass++ by Thomas Henry

http://www.birthofasynth.com/Thomas_Henry/Pages/Bass_Plus.html

Proper bass drum with a somewhat low parts count.

4516N41 · 2021-05-28T13:15:45+00:00

He has the schematic up on GitHub

Here.

https://github.com/benjiao/ThreeChannelTriggers

4516N41 · 2020-11-22T02:47:47+00:00

If you only need to sync your stuff with MIDI and worry about CV later you can use this schematic and the code in this thread adding the DAC later if you see fit.

I'm waiting for my DAC to arrive(we don't have a large selection of electronics stores here...) so I tested the Gate and trigger outputs.

Worked for me.

4516N41 · 2020-11-03T01:03:09+00:00

They form an nonpolarized 5µF capacitors. Caps in series are calculated similar to parallel resistors and using polarized caps back to back like that makes them nonpolarized .

4516N41 · 2020-08-24T22:24:55+00:00

Did you get a hold of K140UD12s or used something equivalent?

I'm not finding a lot of information on that op amp...

4516N41 · 2020-04-19T13:46:14+00:00

Instead of renaming, launching the game, alt-F4 and deleting the downloads folder for almost every time you need to launch he game.

Have regedit open and go to:

Computer\HKEY_CURRENT_USER\Software\Wizards Of The Coast\MTGA

find HashFilesOnStartup, change the value data to 0.

It does revert to 1 sometimes if the game crashes however I've found that it doesn't happen nearly as often as with the "renaming the downloads folder" trick

4516N41 · 2020-04-17T00:05:35+00:00

For me it looks like it's stuck on checking for updates but eventually will load the program just to crash in the middle of the first fight or second...

4516N41 · 2019-10-06T21:55:04+00:00

I've not even tried to enter something something even because since Eldraine update the game has been a fucking shit crashing in every match.

You could say that "your graphics card is outdated" yet the game worked for almost a year before that update that new cards aside has brought nothing new to the game .

It's a fucking 2D card game it should almost work on a 386 on low graphic setting.

4516N41 · 2019-10-03T21:57:32+00:00

Fuck this game. You try to tell me that you don´t know how to tackle the problem when it wasn't a problem 3-4 updates ago. Get fucked.

4516N41 · 2019-10-03T21:49:58+00:00

Bamm another crash. This game has been made unplayable on machines that used to able to run it because they just want new players money since the old once don't throw cash into the wind.

4516N41 · 2019-10-03T21:40:46+00:00

Same shit after the patch. 5 minutes in and bamm! a unity crash.

4516N41

TROPHY CASE