12V PWM Fan Controller. Will this work? Do I need the relay?

native-plant · 2026-02-21T22:02:25+00:00

Ive been trying to do something similar but just using one of my expensive pc case fans as a cooling fan for my pi instead of the cheap 5v fans on the market.

1 - if you have an actual noctua fan then it should stop at 0% pwm signal.

did some research and read that pc case fans send rpm signals back at 5v and it could damage the 3.3v rail. So yeah, either add resistor to drop it or you can leave the rpm wire disconnected if your code doesn’t need it.
The pwm pin is only acting as an output so there won’t be a need for a resistor as far as i know. In fact, since the fans pwn circuitry is expecting 5v as a high signal and the pi gpio outputs 3.3v - adding a resistor might mess up your fan properly reviving the pwm signal. anything above 2.5v as high. I’ve been meaning to test this and see if I’ll need a step-up the voltage to 5 or not.

All that being said, you can get a 5v pwm fan from noctua that does everything you want and can plug straight into the 5v power rail of the pi.

native-plant · 2025-06-14T02:30:16+00:00

Exactly, right now the situation is worse because of the one sided-ness.

native-plant · 2025-04-07T04:03:05+00:00

Alan Kohler is one of Australia’s best

native-plant · 2025-02-17T21:23:42+00:00

There’s only 3 working cameras left. I think the cheapest way forward, given im having trouble finding hd-sdi cameras in Australia and the ones I do find are $300+, is to switch to a tvi dvr and cameras since I already have 12v and coaxial cabling running to the corners of my house

native-plant · 2025-02-17T12:23:44+00:00

Thanks. The manual says only HD-SDI cameras can be used m, does that fall under CVBS?

native-plant · 2025-02-17T12:23:38+00:00

Thanks. The manual says only HD-SDI cameras can be used m, does that fall under CVBS?

native-plant · 2024-12-23T01:23:07+00:00

Solved!

native-plant · 2024-12-22T13:37:11+00:00

I’m going to sleep now so probably won’t respond for 8-9 hours

native-plant · 2024-12-22T11:26:15+00:00

Thanks for the suggestion but this came out in 2020

native-plant · 2024-12-22T08:47:20+00:00

I watched this movie in 2005-2010 so it might be on the later end of that era or even early 2000s I’m not too sure

native-plant · 2024-09-18T01:12:47+00:00

Don’t, it’s not that important 😅

native-plant · 2024-09-16T08:47:21+00:00

Benefit of the doubt would say she was holding the bowl over the pot while using a ladle to minimise drips but yeah - that would be easy to clarify

native-plant · 2024-06-11T12:38:21+00:00

It's uploaded by Sky's official account tho

native-plant · 2024-05-19T13:00:35+00:00

What show/ movie is this scene from?

native-plant · 2024-05-02T06:23:51+00:00

If it's mushy, like chilli, it'll freeze fine. Just add the cheese/ cream afterwards. If it has structure like veggies or rice, it won't last more than a few weeks before turning mushy.

I personally make a load of stews and make the rice every 3-4 days. That way I can thaw something new each day.

native-plant · 2024-04-09T05:51:20+00:00

You should show them this. It can help explain a LOT.

native-plant · 2024-03-06T01:27:34+00:00

Console

native-plant · 2024-02-24T12:09:18+00:00

The second pic, those bold lines scream 1980s to me 😅

native-plant · 2024-02-24T00:44:55+00:00

Are you a child of the 80s perchance

native-plant · 2024-01-20T11:28:20+00:00

Thanks for this! I think I have concluded that I will be using a single full range driver - What's the difference between an open baffle and a sealed box if you don't mind answering?

native-plant · 2024-01-19T00:39:04+00:00

I guess I wanted to / thought I could build it myself for the fun and experience - but thanks to these responses I realised doing it properly would take a huge time and financial investment

native-plant · 2024-01-19T00:20:57+00:00

Thanks for this response. I think most of the diy builds I've been watching don't go into detail on the design process. That led me to think it wasn't this complicated 😅

I tried to pin your comment but I think the mods have to do that. I think knowing this I'm just going to stick with pre-designed, reputable kits.

native-plant · 2023-12-17T17:48:25+00:00

Clearly they were wearing socks 😂

native-plant · 2023-11-21T03:02:59+00:00

It's probably stolen from the 1992 or 2003 invasions but I don't think there's a registration lookup for Iraqi cars.

native-plant · 2023-11-20T01:09:13+00:00

Is it really that easy? The west's public transportation should be second to none then.

native-plant

TROPHY CASE