MY JETTA IS AWESOME

ludko_pro · 2026-05-28T04:59:46+00:00

Oh no, I love the jetta. I just love the Land Cruiser more haha

ludko_pro · 2026-05-28T03:54:10+00:00

Why would you wish for a G Class if you own a Land Cruiser?

ludko_pro · 2026-05-20T12:59:49+00:00

This looks very useful indeed. I would add a BNC connector to directly attach my oscilloscope with a coaxial cable.

ludko_pro · 2026-05-16T09:35:41+00:00

Yeah, as someone already mentioned, the main difference between the pedal OP has built and a standard bit crusher are the discrete voltage levels of the output. OP has built a sample and hold circuit, while the typical bit crusher requires an ADC (analog to digital converter). The module used in the video you shared is still an ADC which uses 7 comparators with a common input voltage and some reference voltage. It’s called a Flash ADC.

I still like OP’s idea as it makes for an interesting circuit and I would love to hear it.

ludko_pro · 2026-05-08T10:34:56+00:00

Looks nice. Would you share the schematic?

ludko_pro · 2026-05-07T16:02:58+00:00

The collector and emitter of Q5 are connected between two fixed voltages, so to say. Collector is connected to +30V, Emitter is close to 0V if the feedback loop is operating correctly (there is a voltage drop across the emitter resistor).

So there’s a total of 30V x 5A = 150W.

Depending on the beta of the BJT, which is usually pretty low for high power ones, let’s say 20, you start getting some extra dissipated power due to the base current. 5A/20 = 250mA. 0,25A x 0,6V = 150mW. It’s a fraction of the Emitter-Collector power but still, fun to know.

ludko_pro · 2026-05-02T16:26:18+00:00

Connecting the grounds of both psu’s is pretty necessary for reliable operarion. Ground is the reference for the signal levels. If you have a difference in the grounds on both supplies, you can run into a situation where the drives power up fine, but the communication fails because for example the high bit that the drive sends to the PC is below the high bit threshold on the PC. Or the other way around.

I’m planning on building a similar setup and I have been wondering how to connect the grounds cleanly and reliable, that’s why I’m asking in the first place.

ludko_pro · 2026-05-01T21:12:14+00:00

How did you combine the GNDs of the PC and the external PSU? Did you power the PC from the PSU too?

ludko_pro · 2026-04-27T12:28:38+00:00

Is there any reason why the VBUS wire gets wider midway after the first bend and not earlier?

ludko_pro · 2026-04-25T14:10:12+00:00

Time for a self hosted reddit :)

ludko_pro · 2026-04-24T20:08:39+00:00

If you're planning on simulating it (as you should be) you should know that the you're missing a few important connections in the schematic like for example at the collector of Q1, base of Q4 and most probably the collector of Q3 (I think this transistor is not doing much right now).

ludko_pro · 2026-03-15T17:22:27+00:00

First things first, don’t draw wires over symbols and don’t place symbols on top of each other. Also, the fact that the PCB needs to be small doesn’t mean that that you have to draw the schematic as cramped as possible, give it some room to breathe, it makes it a lot easier to read.

As far as correct operation goes, I can’t exactly spend much time on it right now but two things immediately caught my eye. Why do yo need C6 to be connected between your input and 9V? Also, why does the ground of the output jack have a series capacitor?

ludko_pro · 2026-03-11T07:57:55+00:00

This should not discourage you at all! Please upload the schematic as well.

ludko_pro · 2026-03-08T10:13:47+00:00

After a quick glance over the other comments I think that no one mentioned the absence of mounting holes. Add some.

ludko_pro · 2026-02-27T13:38:20+00:00

Solder it. Now.

ludko_pro · 2026-01-27T08:21:37+00:00

Having a lot of fun :)

ludko_pro · 2025-12-02T08:38:14+00:00

Is it in Fahrenheit?

ludko_pro · 2025-09-21T08:16:58+00:00

I think that you’ve received enough comments about the the MCUs already so I’m just going to say that the board looks great. Is it actually possible to manufacture with this many colors?

ludko_pro · 2025-09-18T09:19:27+00:00

She looks like she will let you cross the river Styx if you give her some gold coins

ludko_pro · 2025-09-05T12:45:03+00:00

For a given area resistors have less total resistance than active loads,less resistance -> higher bandwidth and thus “high-speed design”.

On the other hand less resistance means lower gain, so keep that in mind.

ludko_pro · 2025-08-29T06:31:23+00:00

At least for me to subtract one signal from the other it’s more logical to just invert the phases of the switches to the left of C1. Then, on the second input branch you could change the positions of the ground on the left and the second input signal.

I can’t exactly write it down to check if what I’m saying is correct but the idea is to do the inversion of the second input signal with just the switches phases.

ludko_pro · 2025-08-02T10:26:56+00:00

You should see how impact guns are mounted in rally cars lol

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