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4 votes
Accepted

LED always on while using FET

The most likely cause for BS270 (or any n-channel JFET) to continue conducting is, as you said, "G leg not connected to anything". The capacitance in the Gate junction stores a charge ...
Seamus's user avatar
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3 votes

Which of those listed logic level MOSFET to choose for driving a heater

I'm a bit unclear on your exact question, but here's a couple of thoughts based on what it seems you're trying to do: Re. power dissipation in a semiconductor: You may be all over this already, and ...
Seamus's user avatar
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3 votes
Accepted

Issue with a 12v switch via GPIO output

You didn't specify your load current requirements. This is a critical piece of information to select a proper transistor to switch your load. Once you learn what your load is, here's a rough guide to ...
Seamus's user avatar
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2 votes
Accepted

Driving a WS2815 (12V, addressable) LED strip

VCC is 5V VDD is 12V you need both. the logic is referenced to VCC, so driving this will be similar to driving a WS2812 strip.
Jasen's user avatar
  • 193
2 votes

Which of those listed logic level MOSFET to choose for driving a heater

I just wanted to draw your attention to the fact that your schematics will not work and will likely kill your electronics. In your first schematic, you apply +12V to RPi GPIO pins (through R1, D1 ...
Dmitry Grigoryev's user avatar
2 votes

Power MOSFET Driving Big Motor Problem

This might work, but it won't work well. The parameter you've asked about (Vgs(th) is 2V minimum and 4V maximum) means this: The threshold voltage at which conduction begins from Drain to Source is ...
Seamus's user avatar
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1 vote
Accepted

IRF530, can I put LED+resistor on input?

It probably won't work - for 2 reasons; The LED will have a voltage drop (1.5V - 2.5V depending on type - independent of "size"). The current through the LED will be ~0.5mA - you may or may not even ...
Milliways's user avatar
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1 vote
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Can I sink the 5V+ pin into a GPIO in open drain mode?

libgpiod is a hardware independent interface to the GPIO driver. AFAIK the Pi SoC do not support open drain the pin is either INPUT or OUTPUT. The Pi is a 3.3V device so connecting a pin to 5V risks ...
Milliways's user avatar
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1 vote
Accepted

Detect if a raspberry zero is turned on

If you want to shutdown a Pi (regardless of whether it uses SD Card or HD) you should run poweroff which enables a controlled shutdown, flushing buffers etc. If you do not do this you risk corruption ...
Milliways's user avatar
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1 vote

Detect if a raspberry zero is turned on

This is the tasks you need to perform: you need to unmount the drive then power off the USB hard drive shut down the Raspberry Pi OS. Other ways to achive the funtion you describe will involve a ...
MatsK's user avatar
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1 vote

What mosfet should i use for controlling a 24V 48W RGB ledstrip with a Raspberry Pi?

Since you did state if all the colors were in one strip I will assume one LED strip for each color. There are many choices for the MOSFET. Since I do not know your resources or skill set I can only ...
Gil's user avatar
  • 1,238

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