Gomo
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Controlling a pwm fan outside of a computer
Gomo replied to Letgomyleghoe's topic in Hobby Electronics
I can recommend you two solutions: 1. PWM signal generator where you can also adjust the frequency (if needed). Aliexpress URL here. It needs its own 12 volts (low current) to function, and sends out the PWM signal for your BLUE wire on the fan. Which means, you connect your fan to 12 Volts (red wire on the plus, black on minus) and blue one goes to the PWM pin on the generator. With "Duty Cycle" you can adjust the RPM. 2. PWM signal generator which is at the same time power source for the fan -> pulses 12 Volts without the need for the BLUE fan wire. Aliexpress URL here. All you need to do here is make sure you have a PWM fan, and connect its plus and minus on the corresponding spots of this PWM signal generator. No need to connect blue fan wire anywhere. With this one, you can only adjust the duty cycle (via the knob), frequency cannot be changed. Benefit is that you don't need a special power supply for the fan, and it can handle up to 120 watt (DC) fans. I've used both, for different use cases. -
"On carpet, it lifts its mop pad safely away and continues with powerful vacuuming avoiding wet carpet messes." Powerful vacuuming == suction + rotating.
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Hey there, does anyone know of a smart robot vacuum cleaner which for example turns off the "spinning" cleaners and only uses suction when on carpet? I didn't have much luck googling as it is kind of specific thing I'd like to find out. I've had one vacuum from iRobot and Roborock, but my specific models didn't have such functionality, they'd detect the carpet and ramp up the suction as well as the spinning (rubber cylinder). Which always resulted in the rubber cylinder pulling bits of carpet out. Disabling the "ramp up" fuction on carpets only made it slightly less bad. But yeah.. long story short, I'm looking for a smart vacuum which has an option to detect carpets and disable "spinning" bits (I know, one "solution" is to mark the area and let the vacuum avoid it) Does such thing even exist? Any suggestions? Thank you!
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Hello guys, I've got few Cisco AIR-CAP3602I-E-K9 access points from a friend and would like to set them up in autonomous mode. They currently in the lightweight mode / WLC operating system. The problem is, I can't download the image I need without having a contract / puchased APs directly from Cisco. Getting an original cisco image from the internet is nearly impossible.. soo. I was wondering if any of you with Cisco access could download this image for me ->> https://software.cisco.com/download/home/284362257/type/284180979/release/15.3.3-JF14i I know it says "Aironet 2600i Access Point" but according to the product page (https://www.cisco.com/c/en/us/support/wireless/aironet-3600i-access-point/model.html#~tab-downloads) that's the right image. I would appreciate it A LOT! Thanks!
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Don't want to be rude, but you're not reading / understanding what I was asking.. Either way, I tested my wiring from the first post (drawing) and it worked as expected.
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I appreciate the reply, but it doesn't answer any of my questions. This fan will not be used in a PC environment, so no point getting a desktop type fan controller. As for the wiring, it doesn't have 4 wires like a standard PWM fan, it has 6. The above mentioned spec sheet is from a similar fan (4 wire model), so I can't relay on it 100%. My main question is still the wiring which can be seen in the first post..
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Anyone? :X
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Uhm, okay .. So, does that mean I should get a similar PWM motor controller, but with 25kHZ (I think mine is 13kHZ) and not use the blue wire at all. Or use the PWM signal generator that I ordered and wire it as shown? Is that wiring schematic okay?
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Hello guys, I have a following fan -> DC Brushless PFM1412DE-SP02 (couldn't find any spec sheets online) which I'd like to use / control using PWM signal. The problem is that the fan has 6 wires and I'm not really sure how to control it. 2 are red, 2 black, 1 blue and 1 yellow. I know that the blue one is for PWM signal, yellow reports the RPM, just not sure about the double red and blacks, if maybe one set of them is supposed to be used differently .. So far I've been using it with this PWN "controller" but the problem is that I cannot get my fan to run at low RPM's. I connected two reds together, as well as two black wires (to have 2, instead of 4) to this PWM motor controller and can only get it to run at what I'd say is 60% of the RPM. If I lower the duty cycle on the knob, at some point it just stops, the RPM's don't go down enough. I assume this is due to the frequency -> no fan spec sheet = guessing the frequency. I ordered this PWM signal generator the other day (it didn't arrive yet) to try and figure out PWM frequency for my fan. My concern is.. the wiring. Should it be connected like this? I'd appreciate your suggestions & tips! Thanks
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Thanks! that's pretty much what I was looking for @SauronThanks as well!
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Clearly I am a bit clueless on how to do that.. would the parameter / placeholder part work?
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Hello guys, does anyone know how to create a script which would do the following: "fail2ban-client set web-manual-jail banip {x}.{x}.{x}.{x}" I have a decent list of IPs that need to be added to that jail (web-manual-jail) and was wondering if something like this could be made? So that for example I only need to run "mb x.x.x.x" (mb - "manual ban"). Your help would be appreciated! Thanks!
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Hello guys, I've been trying to setup a VPN hotspot on my RaspberryPi 4 (running Ubuntu 20.04 LTS) but no success so far. My RaspberryPi is connected via its own integrated wifi to the router, from where it gets internet connection. I have an IpV**ish VPN tunnel set-up & can successfully connect to it. I have purchased a usb wifi adapter which I'd like to use to "beam" the IpV**ish VPN connection. Is this possible, and if so, what's the easiest way to do it? My current attempt: Your help would be greatly appreciated! Cheers!
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I think you didn't understand my question.. I was asking if I could use my drives as they are without formatting them (every drive is in RAID 0 or well, without a raid). And creating multiple RAID configurations is possible on almost every single raid controller card.
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Hello all, I've recently purchased a "new" (used) raid controller "LSI 9260-8i" and was wondering if I there's a way to use my normal HDD's & SSD's as they were (each in raid 0, separately) without formatting the drives? I'd like to have all my drives connected to the raid controller & setup raid 1 and whatnot later. If it's possible, how? Thanks in advance!
