Reddit mentions: The best mosfet transistors

Awesome, thank you. I called it a relay but I meant a transistor. It was this one in fact. Do you think this is okay for the two fans? Should I do one for each to be on the safe side? Or should I buy something different?

Also, do you know of any videos I could watch or books I could read that would help me understand the electricity side of things?

Two years at 30 times a day is 21900 cycles, pretty good for running DC on the chinesium relays that are on that board. You'll get a few more years out of a good relay if you're only doing 1A, but they're still going to wear out on the order of a few years.


You might get better longevity out of an SSR board or something like this: https://www.amazon.com/Diymore-Channels-MOSFET-Button-Arduino/dp/B01MRQFYJN/

Yeah, absolutely. Those aren't even that tiny for a three pin surface mount package, and can be hand soldered with a fine-tip iron. Do you know what the surface markings were before you clipped 'em? I can't clearly tell what type of component it is from the photo, but I did find some other pictures of a KC60 that I'm trying to use to identify the component and values so you can get a replacement.

Edit: It looks like you clipped an A09T transistor. It shouldn't be too hard to find a replacement.

Edit2: Found 'em on Amazon. AO3400 is the same transistor as A09T (in fact, they're labeled A09T).

> IRL520

Got you. For some reason, I thought the Mega could output up to 12v. So I will get an IRL520 and run it off the board like seen in a few youtube videos. Then get an adjustable sound sensor to control it from the same board. Use two separate power supplies 5v/Arduino; 12v/fan with connecting grounds to the ground in the outlet. Thanks very much all!

You're going to probably want to put a three of them in parallel, and use something like this.

That's a pretty heavy current draw on a circuit board, so make sure you reinforce your traces to be able to handle it. If you're putting this in a car, be prepared to deal with the electrical noise it's going to create. If it's something old without fuel injection it may not matter, but a modern car with an ECU may not react well if you don't filter it properly.

Since you'll have a 12V supply already, you can use that to switch the relays by hooking up some MOSFETs to your NodeMCU. The 12V power and NodeMCU will need to share a ground.

Here's an example of the wiring: http://bildr.org/2012/03/rfp30n06le-arduino/ You would be replacing the motor with your relay

I will. Is this an acceptable mosfet? IRF5210 P-Channel Power MOSFET Transistor 100V 40A 60m Ohm https://www.amazon.com/dp/B00HR6AWPI/ref=cm_sw_r_udp_awd_.FA2tb0J9P8B8P9W

Apologies,

mosfets

Heatsinks $11
Sonoff switch $14.00
N-Channel MOSFET $8.88
Stickable Breadboard $9.99
LED lights $11.25
Google AIY Voice Kit $12
HDMI $6.99
5V Power Supply $7.99
12V Power Supply $9.99
Raspberry Pi $38
Monitor $69.99
Mirror $129.99

Total : ~$330

Sample relay or mosfet

You are correct. These are logic level MOSFETs. They are Bridgold IRLB8721 N-Channel MOSFETs: https://www.amazon.com/dp/B07LG5BCDY

I'm not sure if you're looking for something specific, but this is what I found:

https://amazon.com/dp/B07SQBRTZC/ref=cm_sw_r_cp_apa_i_7rlPDbVCD42C7

2N7000

100 pcs of 2N7000 MOSFET N-CHANNEL 60 Volts 0.2 Amps https://www.amazon.com/dp/B00KLBGJL2/

Notice they are not very high power though. I got them for 3.3 to 5V logic level conversion, not power switching, and didn't plan to use them with anything close to 200mA.

So probably not the best thing but I figured I'd mention it anyway.