Hello, for arduino what would be the best way of switching on and off 12v 15a? I have a computer that is 300w power supply it is 12v coming into the computer and the rest is internal. I just wanted to be a way to switch it off and on remote if I need to using an arduino. I was looking at one of th…

I did manage to find one. Will this work? https://www.newark.com/vishay/sqd40061el-ge3/mosfet-p-ch-40v-100a-175deg-c/dp/81AC2812 I understand I would need to heat sink it because of the current. Joseph

[image] josephchrzempiec: Will this work? No. That's a MOSFET only, not a high-side switch.

[image] DrDiettrich: MOSFET high-side switch I have found this one https://www.mouser.com/ProductDetail/Vishay-Siliconix/SUB75P03-07-E3?qs=5FikLrW7sTsx9CrHXnBGIw%3D%3D Which is no longer available but mouser said that There is this one That is a Similar Product. https://www.mouser.com/Prod…

[image] josephchrzempiec: Will this work? https://www.newark.com/vishay/sqd40061el-ge3/mosfet-p-ch-40v-100a-175deg-c/dp/81AC2812 That is quite a good P Channel mosfet with an RDS(on) of 0.0042 ohms. At 25 amps, the heating effect will be about 2.5 watts so will require a heat sink. To make …

Hello 6v6gt, Which transistor would I need and resistors? Joseph

[image] josephchrzempiec: Which transistor would I need and resistors? In the diagram below: T1 is 2N3904 R1 is 10K Base resistor of T1 (not shown) is 1K [image]

Hello 6v6gt, Wow thank you. This will help me a lot. I don't have 3904's, I do have a lot of 2N222's. Would that work as well? Joseph

[image] josephchrzempiec: I don't have 3904's, I do have a lot of 2N222's Yes more or less any low power NPN transistor would do. It is not critical at all here.

Thank you very much. I have them on order they be here by sat. Joseph

12v 25a switching off and on?

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DrDiettrich June 6, 2022, 5:44am 2

Look for a "MOSFET high-side switch".

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12v 25a switching off and on?

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