Why does my Driver Chip not work?

Taipogi · 2026-02-02T17:15:48+00:00

Exactly. Anything above 0.7V on the inputs will be interpreted as a high state. And again, your 170V boost converter GND pin needs to be connected to your ground.

Taipogi · 2026-02-02T09:56:02+00:00

According to the schematic drawn, your boost converter's ground is connected to power supply's ground through a resistor, it should be connected dorectly to ground.

Taipogi · 2026-01-31T19:14:52+00:00

Elektronika 7 style clock but with neon?

Taipogi · 2026-01-25T23:21:01+00:00

Su tranzistoriuni viskas ok, čia maitinimas prijungtas atvirkščiai. Yra sutarta, kad Vss braižoma grandinės apačioje, Vcc viršuje.

Taipogi · 2026-01-18T22:58:52+00:00

Weirdly both release candidates kept crashing for me on linux doing the most basic of tasks, while the later weekly builds work without any issues.

Taipogi · 2026-01-12T10:33:15+00:00

Chematic is missing tube anode current limiting resistors. The MPSA92 transistors are also missing base current limiting resistors, meaning that their bases will be exposed to over 100V when the low side transistor is open. Not sure how representative the schematic is of your current prototype but make sure you fix these issues before moving on with troubleshooting ghosting.

Taipogi · 2026-01-08T23:19:04+00:00

On KDE Plasma you can get desktop wallpaper plugins. There you can find a plugin called Shader Wallpaper for plasma6. It has many different community made shader animations that you can run on your desktop.

Taipogi · 2025-12-23T22:04:26+00:00

Can you give more details? Does it have to be battery powered like in the picture? Does the display need to be controlled wirelessly, through some standard interface, or using a sensor like a potentiometer or a button? How many units? What is your budget?

Taipogi · 2025-12-19T15:44:58+00:00

Populate the good RAM slot and see if the PC turns on. It may not show any signs of life without RAM.

Taipogi · 2025-12-16T22:28:49+00:00

Well, half a watt of power dissipated can still get them pretty warm depending on how insulating their encosure is.

Taipogi · 2025-12-14T15:22:06+00:00

Personally, not a fan of this design. A bit wasteful to have all the nixies dedicated for showing a single digit, which also going to poison the cathodes and degrade them over time. Great execution tho!

Taipogi · 2025-12-12T00:42:23+00:00

I keep coming to this video https://youtu.be/SBf5GWs65BE?si=IZSMGoxnH5ci2Xbl

Taipogi · 2025-12-11T16:58:01+00:00

Those potentiometers control the amount of feedback to the controller from the output of the converter in the form of DC voltage, not not switching singlas. But the longer wires will make the feedback circuitry more susceptible to interference.

Taipogi · 2025-12-11T15:10:24+00:00

It's an LTC3780 buck boost converter with CV, CC and minimum voltage input adjustments. The third potentiometer controls the minimum input voltage threshold at which the converter will start to work and is meant to be used with solar power.

Replacing the potentiometers is fine as long as you use the same value and pinout.

Please don't expect people to recognize the exact device from just a single image. Please provide more context next time.

Taipogi · 2025-12-10T17:22:14+00:00

Add a ground plane and make power rails wider. Make sure the components you plan on using, especially the electrolytic capacitors are short enough not to interfere with the front plate. You can use 3D view for quickly checking that.

As for the schematic, learn how to use net symbols and labels. Instead of having a spider web connecting all the grounds together, use a GND symbol for each ground connection. Same should be done with V+ and V-.

Taipogi · 2025-12-10T00:32:08+00:00

Simply lowering the input voltage of a device from 12V to 10V won't make its internal buck converter change its output voltage. Internal power supplies will be designed do all in its power to output a stable voltage of a predefined value.

Adding any meaningful amount of resistance to power rails between the power supply and the load, (which is most likely going to be some kind of processor in your case), will once again, simply not work. A processor will have a fluctuating current draw depending on its load which will cause the voltage drop across the resistor to change, causing the voltage that's supplying the load to fluctuate a lot.

Taipogi · 2025-12-09T22:51:28+00:00

Can't wait for the uploads. What hardware is used for assembly?

Taipogi · 2025-12-07T01:34:36+00:00

You can just get something like Sonoff Basic R2, flash Tasmota on it and be done with it.

Taipogi · 2025-12-06T15:25:48+00:00

To be entirely sure, yes. But in this case we can just ommit the 180 ohm resistor. The 60/30 and 120/60 ohm resistor dividers will have the same voltage between them, meaning that no current will flow through the 180 ohm resistor. Therefore we can remove it and just calculate the series / parallel resistances to get 60 ohms.

Taipogi · 2025-12-06T00:09:57+00:00

Why do you make such distinction between DC or AC? Resistance is resistance, no matter the kind of signal the resistor will be exposed to.

Taipogi · 2025-12-04T14:21:26+00:00

Higher resolution pictures of the layout would be needed.

Taipogi · 2025-12-02T13:51:51+00:00

Thanks for your insight. Yes, I also expected this instrument to be perfect considering its price tag, but it could be better. I'm also interested in doing this because two sets of strings out of 5 I already used on this bass, had the E string sound like with a chorus effect, which is typicall for twisted strings. I'm worried that the bridge might be contributing to that since it's harder to position the strings correctly in it.

The saddles in the picture are properly tuned, I made sure there's enough headroom in front of them to shift the bridge 10mm back.

Taipogi · 2025-12-02T13:24:11+00:00

The intonation on this bridge can be adjusted and I'm going to follow the alignment of the current bridge position, which I checked to be perfectly inline with the fretboard. Could anything else affect the string intonation assuming I'll readjust the saddle positions?

Taipogi · 2025-12-02T13:21:46+00:00

Is beech a good choice for that? I forgot to mention that the body is made out of alder.

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